| Station Name |
Months |
Country |
Earliest |
Most Recent |
| I-L RANCH | 69 | United States | Aug 1962 | Aug 1969 |
| I-LAN FORMOSA/NILAN | 37 | China | Sep 1956 | Oct 1959 |
| IASI | 754 | Romania | Jan 1951 | Oct 2013 |
| IAUARETE | 27 | Brazil | Jan 2008 | Oct 2013 |
| IBA | 628 | Philippines | Jan 1951 | Oct 2013 |
| IBADAN | 515 | Nigeria | Jan 1906 | Dec 1950 |
| IBADAN | 6 | Nigeria | Sep 2009 | Sep 2011 |
| IBAGUE/PERALES | 348 | Colombia | Jun 1973 | Oct 2013 |
| IBAPAH | 1092 | United States | Jan 1903 | Sep 2013 |
| IBAPAH NEAR | 32 | United States | Oct 1906 | Jul 1911 |
| IBARRA AEROPUERTO | 317 | Ecuador | Jan 1929 | Aug 1988 |
| IBAX | 22 | United States | Nov 1909 | Feb 1914 |
| IBB | 54 | Yemen | Oct 2008 | Oct 2013 |
| IBERVILLE | 520 | Canada | Jan 1963 | Feb 2011 |
| IBRA | 122 | Oman | Jan 2002 | Oct 2013 |
| IBRI | 87 | Oman | Oct 2004 | Oct 2013 |
| IBUKIYAMA MTN (AUT) | 836 | Japan | Jan 1919 | Dec 1990 |
| ICE HARBOR DAM | 654 | United States | Apr 1957 | Mar 2013 |
| ICE RUNWAY | 18 | Antarctica | Oct 2001 | Nov 2012 |
| ICE SKATE B | 10 | Iceland | Sep 1960 | Oct 1961 |
| ICECAP | 6 | Greenland [Denmark] | Jan 1954 | Dec 1954 |
| ICH'ON | 252 | Korea, South | Jan 1973 | Dec 1993 |
| ICHA / KAMCHATKA | 917 | Russia | Jan 1935 | Oct 2013 |
| ICHEON | 57 | Korea, South | Feb 2009 | Oct 2013 |
| ICHERA | 250 | Russia | Mar 1948 | Jul 1981 |
| ICHIGAYA | 22 | Japan | Aug 2007 | Oct 2013 |
| ICY BAY | 8 | United States | Dec 2012 | Oct 2013 |
| IDA (AUTO) | 107 | Canada | Apr 1975 | Mar 1987 |
| IDA GROVE 5 NW | 761 | United States | Nov 1902 | Dec 2007 |
| IDABEL | 1051 | United States | Apr 1907 | Sep 2013 |
| IDAHO CITY | 1226 | United States | Feb 1894 | Jan 2013 |
| IDAHO CO | 140 | United States | Apr 1990 | Oct 2013 |
| IDAHO FALLS - KIFI | 691 | United States | Jun 1952 | Oct 2013 |
| IDAHO FALLS 16 SE | 631 | United States | May 1960 | Oct 2013 |
| IDAHO FALLS 42 NW WB | 174 | United States | Mar 1954 | Jun 1969 |
| IDAHO FALLS 46 W | 711 | United States | Apr 1954 | Sep 2013 |
| IDAHO FALLS FANNING FIELD | 1246 | United States | Jan 1905 | Oct 2013 |
| IDAHO FALLS RGNL | 490 | United States | Jan 1973 | Oct 2013 |
| IDAHO SPRINGS | 830 | United States | Jan 1893 | Jun 1974 |
| IDALIA | 292 | United States | Sep 1987 | Oct 2013 |
| IDAR-OBERSTEIN | 390 | Germany | Jan 1973 | Jul 2013 |
| IDARADO | 313 | United States | Oct 1986 | Oct 2013 |
| IDKERBERGET | 548 | Sweden | Jun 1961 | Feb 2010 |
| IDLEYLD PARK 4 NE | 632 | United States | Nov 1960 | Oct 2013 |
| IDRE FJALL | 179 | Sweden | Jul 1998 | Oct 2013 |
| IDRE-STORBO_V | 183 | Sweden | May 1996 | Dec 2011 |
| IDRE_FJALL_A | 304 | Sweden | May 1985 | Dec 2011 |
| IDRIA | 642 | United States | May 1918 | Nov 1976 |
| IDRICA | 243 | Russia | Oct 1949 | Mar 1977 |
| IDRINSKOE | 510 | Russia | Apr 1948 | Oct 2013 |
| IDVATTNET | 152 | Sweden | Oct 1982 | Nov 1995 |
| IDVATTNET | 149 | Sweden | Mar 1983 | Oct 1995 |
| IDWEN USSR | 150 | Latvia | Aug 1853 | Oct 1867 |
| IDYLLWILD FIRE DEPT | 847 | United States | Nov 1901 | Sep 2013 |
| IEMA | 329 | Russia | Dec 1959 | Oct 2013 |
| IERAPETRA | 14 | Greece | Aug 1969 | Jan 1971 |
| IEZER | 184 | Romania | May 1983 | Sep 2002 |
| IFRANE | 21 | Morocco | Jan 1966 | Dec 1967 |
| IGARAPAVA | 360 | Brazil | Jan 1901 | Dec 1930 |
| IGARKA | 891 | Russia | Jan 1936 | Oct 2013 |
| IGARKA | 103 | Russia | Sep 2004 | May 2013 |
| IGDIR | 389 | Turkey | Jan 1961 | Oct 2013 |
| IGDIR AIRPORT | 13 | Turkey | Aug 2012 | Oct 2013 |
| IGIUGIG AP | 88 | United States | Jan 2006 | Oct 2013 |
| IGLOO | 39 | United States | Nov 1919 | Dec 1928 |
| IGLOO LODGE | 12 | United States | Jun 2002 | Jul 2003 |
| IGLOOLIK AIRPORT | 353 | Canada | Sep 1980 | Oct 2013 |
| IGLOOLIK,NW | 290 | Canada | Oct 1977 | Nov 2002 |
| IGNACE TCPL 58 | 181 | Canada | Dec 1969 | Apr 1993 |
| IGNACE,ON | 655 | Canada | Jan 1914 | Jan 1971 |
| IGNACIO 1 N | 904 | United States | Mar 1914 | Jun 1993 |
| IGNACIO 8E | 153 | United States | Jan 2001 | Oct 2013 |
| IGNASINO | 529 | Russia | Jan 1959 | Oct 2013 |
| IGNATYEVO | 33 | Russia | Jan 2011 | Oct 2013 |
| IGRIM | 252 | Russia | Apr 1963 | Sep 1994 |
| IGUALA | 264 | Mexico | Sep 1955 | Oct 1998 |
| IGUAPE | 922 | Brazil | Jan 1895 | Mar 1988 |
| IGUAZU AERO | 504 | Argentina | Aug 1962 | Oct 2013 |
| IHOSY | 340 | Madagascar | Jan 1903 | Dec 1961 |
| IIDA | 1385 | Japan | Jan 1898 | Oct 2013 |
| IIE DE GROIX | 254 | France | Jan 1984 | Oct 2013 |
| IIZUKA | 910 | Japan | Sep 1935 | Oct 2013 |
| IJID-PATOK | 88 | Russia | Jul 1979 | Jul 1991 |
| IJMUIDEN WP | 277 | Netherlands | Nov 1953 | Jan 1995 |
| IKA | 804 | Russia | Nov 1944 | Oct 2013 |
| IKATEK GREENLAND | 52 | Greenland [Denmark] | Nov 1942 | Sep 1947 |
| IKEDA BAY,BC | 125 | Canada | Jul 1908 | Aug 1920 |
| IKEJ | 187 | Russia | Feb 1955 | Dec 1994 |
| IKEJA | 120 | Nigeria | Jan 1991 | Dec 2000 |
| IKERASASSUAQ | 485 | Greenland [Denmark] | Jan 1958 | Nov 2012 |
| IKERASASSUAQ (PRINS CHRISTIAN SUND) | 799 | Greenland [Denmark] | Jan 1943 | Sep 2013 |
| IKERMIIT | 292 | Greenland [Denmark] | Sep 1987 | Oct 2013 |
| IKERMIUARSSUK (AUT) | 96 | Greenland [Denmark] | Jan 1981 | Jul 1989 |
| IKERMIUARSUK | 327 | Greenland [Denmark] | Nov 1943 | Oct 2013 |
| IKI AIRPORT | 387 | Japan | Jan 1973 | Mar 2006 |
| IKI-BURUL | 8 | Russia | Oct 2012 | Oct 2013 |
| IKITSUKIJIMA | 112 | Japan | Jan 1953 | Apr 1962 |
| IKIZCEHAYMANA | 157 | Turkey | Jan 1965 | Dec 1978 |
| ILAM | 240 | Iran | Jan 1991 | Oct 2013 |
| ILAM | 93 | Iran | Dec 2004 | Oct 2013 |
| ILAN | 762 | Taiwan | Jan 1936 | Oct 2000 |
| ILAN CITY | 252 | Taiwan | Sep 1974 | Dec 1998 |
| ILCIR | 16 | Russia | Jan 1969 | Oct 1976 |
| ILDERTON BEAR CREEK | 349 | Canada | May 1971 | Jun 2001 |
| ILE ART (BELEP) | 130 | New Caledonia [France] | May 2002 | Oct 2013 |
| ILE AUX COUDRES | 358 | Canada | Oct 1968 | Dec 2001 |
| ILE AUX PERROQUETS, QUE | 171 | Canada | Feb 1994 | Dec 2010 |
| ILE BIQUETTE | 153 | Canada | Feb 1994 | Dec 2010 |
| ILE D'ORLEANS, QUE | 163 | Canada | Oct 1988 | Feb 2003 |
| ILE DE GROIX | 620 | France | Jan 1949 | Dec 2004 |
| ILE EUROPA | 711 | Europa Island | Jan 1951 | Oct 2013 |
| ILE LOOP /CHESTERFI | 222 | New Caledonia [France] | Jan 1978 | Oct 2013 |
| ILE ROUGE (MAPS) | 5 | Canada | Sep 1992 | Jan 1993 |
| ILE ROUGE, QUE | 155 | Canada | Jun 1993 | Dec 2010 |
| ILE ROUSSE | 202 | France | Oct 1988 | Aug 2013 |
| ILE ROYALE | 31 | French Guiana [France] | Jan 1901 | Jul 1903 |
| ILE SURPRISE | 264 | New Caledonia [France] | Jul 1977 | Oct 2013 |
| ILES DE LA MADELEINA | 33 | Canada | Jan 2011 | Oct 2013 |
| ILES DE LA MADELEINE A, QUE | 489 | Canada | Jan 1973 | Oct 2013 |
| ILES GLORIEUSES ILES GLORIEUSE | 608 | Comoros | Apr 1957 | Oct 2013 |
| ILGIN | 272 | Turkey | May 1968 | Dec 1990 |
| ILHEUS (AEROPORTO) | 439 | Brazil | Mar 1973 | Oct 2013 |
| ILIAD | 476 | United States | Aug 1959 | Jul 2001 |
| ILIAMNA/ILIAMNA AIRPORT | 865 | United States | Apr 1920 | Oct 2013 |
| ILIMSK (CLOSED) | 8 | Russia | Apr 1969 | Oct 1970 |
| ILINSKOYE-IN-TYUMEN | 204 | Russia | Jan 1969 | Aug 1988 |
| ILIRNEJ | 768 | Russia | Oct 1944 | Apr 2012 |
| ILIRNEJ | 750 | Russia | Oct 1944 | Oct 2013 |
| ILIYSK | 32 | Kazakhstan | Jan 1981 | Nov 1989 |
| ILLAHE 2 N | 784 | United States | Jul 1920 | Jun 2007 |
| ILLERBRUN | 172 | Canada | Jan 1935 | Sep 1949 |
| ILLESHEIM | 352 | Germany | Jan 1940 | Oct 2013 |
| ILLINOIS CITY DAM 16 | 170 | United States | Jun 1943 | Oct 2013 |
| ILLINOIS CREEK | 107 | United States | Feb 1991 | Nov 2004 |
| ILLINOIS VALLEY AIRPORT OREGON | 331 | United States | Feb 1985 | Oct 2013 |
| ILLINOIS VALLEY RGNL | 107 | United States | Jun 2004 | Oct 2013 |
| ILO | 33 | Peru | Nov 2007 | Jul 2013 |
| ILOILO CITY, ILOILO | 1198 | Philippines | Jan 1903 | Mar 2011 |
| ILOMANTSI KK | 485 | Finland | May 1959 | May 2000 |
| ILOMANTSI MEKRIJARVI | 167 | Finland | Oct 1999 | Aug 2013 |
| ILOMANTSI MEKRIJARVI | 127 | Finland | Apr 2003 | Oct 2013 |
| ILOMANTSI NAARVA | 176 | Finland | Nov 1989 | Jun 2004 |
| ILOMANTSI POTSONVAARA | 107 | Finland | Jul 2004 | Oct 2013 |
| ILOMANTSI VALIVAARA | 154 | Finland | Jan 1977 | Oct 1989 |
| ILOPANGO | 118 | El Salvador | Jan 1971 | Dec 1980 |
| ILORIN NIGI ILOR | 445 | Nigeria | Jan 1951 | Mar 2013 |
| ILOVLJA | 7 | Russia | Nov 2012 | Oct 2013 |
| ILULISSAT (JAKOBSHAVN) | 992 | Greenland [Denmark] | Jun 1877 | Aug 1992 |
| ILULISSAT /JAKOBSHA | 294 | Greenland [Denmark] | Oct 1988 | Oct 2013 |
| ILULISSAT MITTARFIK | 235 | Greenland [Denmark] | Nov 1991 | Dec 2012 |
| ILYINSKIY | 825 | Russia | Apr 1942 | Oct 2013 |
| IM OOINNAOTSATI LET OKTABRYA | 35 | Russia | May 1949 | Dec 1952 |
| IM. M.V. POPOVA | 618 | Russia | Jan 1937 | Oct 2013 |
| IM. POLINY OSIPENKO | 1108 | Russia | Jan 1911 | Oct 2013 |
| IM.E.K.FEDOROVA(BOLVANSKII NOS | 564 | Russia | Jul 1959 | Mar 2012 |
| IM.YU.A. HABAROVA | 230 | Russia | Nov 1957 | Oct 2013 |
| IMAM KHOMENI | 99 | Iran | Dec 2004 | Oct 2013 |
| IMATA | 310 | Peru | Jan 1936 | Dec 1963 |
| IMBIL FORESTRY | 132 | Australia | Nov 1966 | Mar 1993 |
| IMENI SHAVCHEMKO | 81 | Kazakhstan | Dec 1975 | Jun 1988 |
| IMENY_T.G.SHEVCHENKO | 33 | Ukraine | Jan 2000 | Mar 2004 |
| IMLAY | 1094 | United States | Mar 1914 | Oct 2013 |
| IMMIGRATION WASH NEVADA | 276 | United States | Jul 1990 | Oct 2013 |
| IMMOKALEE 3 NNW | 462 | United States | Jun 1970 | Oct 2013 |
| IMNAHA 2 | 19 | United States | Aug 1962 | Aug 1965 |
| IMNAHA 5 N | 63 | United States | Sep 1969 | Dec 1974 |
| IMPERATRIZ | 158 | Brazil | Oct 1987 | Oct 2013 |
| IMPERIA | 173 | Italy | Dec 1985 | Apr 2007 |
| IMPERIAL | 1433 | United States | Sep 1890 | Oct 2013 |
| IMPERIAL | 1114 | United States | Nov 1901 | Aug 2013 |
| IMPERIAL | 253 | United States | Feb 1961 | Nov 1983 |
| IMPERIAL | 27 | United States | Dec 1912 | Mar 1916 |
| IMPERIAL 13 N | 19 | United States | Sep 1997 | Apr 1999 |
| IMPERIAL BEACH NOLF | 454 | United States | Jan 1973 | Oct 2013 |
| IMPERIAL BEACH REAM FIELD NAS | 479 | United States | Apr 1945 | Jun 2003 |
| IMPERIAL BEACH REAM FLD NAS | 300 | United States | Jun 1945 | Apr 2002 |
| IMPERIAL COL | 59 | Trinidad and Tobago | Jan 1952 | Dec 1956 |
| IMPERIAL LO | 12 | Canada | May 2004 | Aug 2007 |
| IMPERIAL SAND DUNES | 31 | United States | Mar 1995 | Oct 1997 |
| IMPERIAL,SA | 350 | Canada | Dec 1911 | Sep 1966 |
| IMPERIAL/FAA AIRPORT | 643 | United States | Dec 1950 | Oct 2013 |
| IMPERIAL/FAA AIRPORT | 620 | United States | Feb 1962 | Oct 2013 |
| IMPFONDO CONGO PEOPLES REP | 822 | Congo | Jan 1941 | Oct 2013 |
| IMPHAL | 221 | India | Dec 1944 | Oct 2013 |
| IMSHIL | 252 | Korea, South | Jan 1973 | Dec 1993 |
| IMURUK LAKE ALASKA | 7 | United States | Apr 1945 | Oct 1945 |
| IMUS BROTHERS RANCH | 27 | United States | Mar 1915 | Jul 1917 |
| IN AMENAS | 661 | Algeria | Oct 1958 | Oct 2013 |
| IN AMENAS | 540 | Algeria | Feb 1963 | Oct 2013 |
| IN AMGUEL | 9 | Algeria | Mar 1966 | Nov 1966 |
| IN GUEZZAM | 12 | Algeria | Sep 2012 | Oct 2013 |
| IN SALAH | 766 | Algeria | Jan 1903 | Oct 2013 |
| IN ZIZA | 46 | Algeria | Apr 2009 | Oct 2013 |
| IN-EZZANE / ILLIZI | 49 | Algeria | Oct 2008 | Nov 2012 |
| IN-GUEZZAM | 109 | Algeria | Aug 1989 | Mar 2008 |
| INAQUITO | 21 | Ecuador | Jan 2012 | Oct 2013 |
| INARAJAN - NASA | 156 | Guam [United States] | Jul 1978 | Oct 1991 |
| INARI ANGELI LINTUPUOLISELKA | 58 | Finland | Oct 2008 | Aug 2013 |
| INARI IVALO AIRPORT | 649 | Finland | Jul 1957 | Oct 2013 |
| INARI IVALO LENTOASEMA | 655 | Finland | Jan 1959 | Aug 2013 |
| INARI KAAMANEN | 61 | Finland | Aug 2008 | Aug 2013 |
| INARI KIILOPAA | 54 | Finland | Jan 1972 | Feb 1978 |
| INARI KIRAKKAJARVI | 48 | Finland | Sep 2009 | Aug 2013 |
| INARI KIRAKKAJARVI SANILANLAMP | 208 | Finland | Nov 1993 | Apr 2011 |
| INARI LAANILA | 119 | Finland | Apr 1960 | Oct 1971 |
| INARI NELLIM | 242 | Finland | Jul 1993 | Oct 2013 |
| INARI NELLIM-1 | 485 | Finland | May 1959 | Sep 1999 |
| INARI PARTAKKO | 72 | Finland | Jan 1979 | Dec 1984 |
| INARI RAJAJOOSEPPI | 123 | Finland | Aug 2003 | Oct 2013 |
| INARI SAARISELKA | 61 | Finland | Aug 2008 | Oct 2013 |
| INARI SAARISELKA AWS | 62 | Finland | Feb 2008 | Oct 2013 |
| INARI SAARISELKA KAUNISPAA | 186 | Finland | Dec 1995 | Aug 2013 |
| INARI SAARISELKA MATKAILUKESKU | 404 | Finland | Jan 1980 | Aug 2013 |
| INARI SEITALAASSA | 27 | Finland | May 2011 | Aug 2013 |
| INARI SEVETTIJARVI | 38 | Finland | Feb 2008 | Apr 2011 |
| INARI SEVETTIJARVI-1 | 310 | Finland | Feb 1971 | Jun 2009 |
| INARI TOIVONIEMI | 439 | Finland | May 1959 | Nov 1995 |
| INARI VAYLA | 241 | Finland | Jul 1993 | Oct 2013 |
| INCHELIUM 2 NW | 270 | United States | Jan 1940 | Sep 1975 |
| INCHEON | 1293 | Korea, South | Jan 1905 | Oct 2013 |
| INCHEON INTL AIRPOR | 197 | Korea, South | Jul 1964 | Oct 2013 |
| INCY | 116 | Russia | May 1979 | Sep 1994 |
| IND SPRNG RANGE 63 | 59 | United States | Feb 1982 | Aug 2011 |
| INDEPENDENCE | 1498 | United States | Jan 1888 | Oct 2013 |
| INDEPENDENCE | 1422 | United States | Jan 1872 | Dec 1990 |
| INDEPENDENCE | 1273 | United States | Jan 1893 | Sep 2013 |
| INDEPENDENCE | 757 | United States | Feb 1905 | Dec 1990 |
| INDEPENDENCE 1 W | 668 | United States | Dec 1957 | Oct 2013 |
| INDEPENDENCE 2 | 437 | United States | Oct 1973 | Oct 2013 |
| INDEPENDENCE CAMP | 277 | United States | Nov 1983 | Oct 2013 |
| INDEPENDENCE CREEK | 209 | United States | Oct 1990 | Oct 2013 |
| INDEPENDENCE KANSAS AAF | 31 | United States | Jun 1943 | Jul 1947 |
| INDEPENDENCE LAKE | 167 | United States | Oct 1994 | Oct 2013 |
| INDEPENDENCE MUNI | 40 | United States | Jun 2010 | Oct 2013 |
| INDEPENDENCE MUNI AP | 1481 | United States | Mar 1883 | Oct 2013 |
| INDEPENDENCE PASS 5 SW | 394 | United States | Sep 1970 | Oct 2013 |
| INDEX | 2 | United States | Feb 1930 | Nov 1930 |
| INDIA (ULM) | 8 | United States | Oct 2012 | Oct 2013 |
| INDIAN BAY | 1140 | Canada | Apr 1915 | Sep 2013 |
| INDIAN BAY B.B. | 215 | Canada | Nov 1987 | Nov 2008 |
| INDIAN CANYON | 313 | United States | Sep 1986 | Oct 2013 |
| INDIAN CHUTE,ON | 221 | Canada | Feb 1950 | Jan 1972 |
| INDIAN COVE | 146 | United States | Nov 1912 | Jun 1937 |
| INDIAN CREEK | 316 | United States | Dec 1985 | Oct 2013 |
| INDIAN CREEK RANCH - DUCKWATER | 109 | United States | Jun 2003 | Oct 2012 |
| INDIAN GRAVE TENNESSEE | 184 | United States | Mar 1997 | Oct 2013 |
| INDIAN HEAD CDA, SASK | 1469 | Canada | Oct 1889 | Oct 2013 |
| INDIAN HEAD PFRA | 415 | Canada | Jan 1960 | Mar 1995 |
| INDIAN HOUSE LAKE QUEBEC | 221 | Canada | Sep 1944 | Dec 1964 |
| INDIAN LAKE 2 SW | 1348 | United States | Sep 1899 | Oct 2013 |
| INDIAN LAKE ESTATES | 233 | United States | May 1958 | Mar 1981 |
| INDIAN MILLS 2 W | 1342 | United States | May 1901 | Sep 2013 |
| INDIAN MOUNTAIN | 203 | United States | Aug 1966 | Jan 1985 |
| INDIAN MOUNTAIN AFS | 622 | United States | Aug 1951 | Oct 2013 |
| INDIAN RIVER (CGS) | 28 | United States | Oct 1975 | Jun 1983 |
| INDIAN SPRINGS GUNN | 471 | United States | Nov 1913 | Oct 2013 |
| INDIAN WELL CALIFORNIA | 169 | United States | Jun 1997 | Oct 2013 |
| INDIAN WELL HQS | 17 | United States | Aug 1948 | Dec 1949 |
| INDIAN WELLS TRADING POST | 7 | United States | Jan 1958 | Aug 1958 |
| INDIAN-LAKE-2SW | 1074 | United States | Sep 1899 | Dec 1990 |
| INDIAN-MILLS-2W | 1140 | United States | May 1901 | Nov 1996 |
| INDIANA 3 SE | 798 | United States | Oct 1946 | Sep 2013 |
| INDIANA CO | 168 | United States | Mar 1999 | Oct 2013 |
| INDIANA DUNES NATIONAL LAKESH | 290 | United States | Jun 1989 | Sep 2013 |
| INDIANA J STEWART | 435 | United States | Jun 1896 | Dec 2005 |
| INDIANAPOLIS EAGLE CREEK AP | 207 | United States | Jul 1996 | Oct 2013 |
| INDIANAPOLIS EXECUTI | 61 | United States | Aug 2008 | Oct 2013 |
| INDIANAPOLIS HOL PARK | 84 | United States | May 1942 | Apr 1949 |
| INDIANAPOLIS MNMT CITY | 191 | United States | Apr 1948 | Feb 1964 |
| INDIANAPOLIS NWFO | 22 | United States | Sep 2011 | Aug 2013 |
| INDIANAPOLIS SE SIDE | 738 | United States | Nov 1951 | Jul 2013 |
| INDIANAPOLIS/I.-MUN/WEIR COOK, IN. | 1712 | United States | Mar 1871 | Oct 2013 |
| INDIANOLA | 59 | United States | Apr 1901 | Nov 1908 |
| INDIANOLA 2 N | 53 | United States | Aug 1948 | Dec 1952 |
| INDIANOLA 5 NNW | 1489 | United States | Jun 1882 | Oct 2013 |
| INDIANOLA IDAHO | 281 | United States | Nov 1987 | Oct 2013 |
| INDIANTOWN | 97 | United States | Apr 1929 | Jan 1968 |
| INDIGA | 1056 | Russia | Nov 1923 | Oct 2013 |
| INDIN RIVER (MAPS) | 13 | Canada | May 1991 | May 1993 |
| INDIO FIRE STATION | 1479 | United States | Jan 1880 | Sep 2013 |
| INDORE | 1621 | India | Apr 1878 | Oct 2013 |
| INEBOLU | 613 | Turkey | Jan 1961 | Oct 2013 |
| INEZ 2 E | 234 | United States | Feb 1951 | Oct 2013 |
| INFANTA | 668 | Philippines | Jan 1951 | Oct 2013 |
| ING MANUELIT | 91 | Colombia | Jan 1957 | Aug 1990 |
| INGA | 824 | Russia | Nov 1937 | Oct 2013 |
| INGA | 81 | Zaire | Nov 1972 | Dec 1986 |
| INGEBRIGHT LAKE | 293 | Canada | Nov 1964 | Jun 1998 |
| INGENIKA POINT,BC | 158 | Canada | Oct 1972 | Oct 2004 |
| INGERSOLL | 73 | Canada | Aug 1872 | Nov 1888 |
| INGHAM COMPOSITE | 457 | Australia | Apr 1968 | Sep 2013 |
| INGLESIDE | 68 | United States | Nov 2007 | Oct 2013 |
| INGLEWOOD FOREST | 144 | Australia | Mar 2000 | Jan 2013 |
| INGLEWOOD TOBACCO RES | 146 | Australia | Aug 1972 | May 1985 |
| INGLIS | 90 | Canada | Apr 1950 | Sep 1969 |
| INGOLF | 150 | Canada | Nov 1927 | Sep 1941 |
| INGOLSTADT (FLUGPLATZ) | 440 | Germany | Nov 1939 | Oct 2013 |
| INGOMAR | 22 | United States | Jan 1914 | Sep 1955 |
| INGOMAR 14 NE | 675 | United States | May 1956 | Sep 2013 |
| INGOMAR 6 SE | 342 | United States | Apr 1924 | Jul 1954 |
| INGONISH BEACH CS, NS | 712 | Canada | Sep 1950 | Oct 2013 |
| INGOY | 120 | Norway | Jan 1941 | Dec 1950 |
| INGRAM | 113 | United States | Nov 1922 | Mar 1933 |
| INGUINCHO | 27 | Ecuador | Dec 1974 | May 1977 |
| INHAMBANE MOZA INHA | 1058 | Mozambique | Jan 1916 | Oct 2013 |
| INHAMINGA | 343 | Mozambique | Jan 1929 | Dec 1960 |
| INING | 20 | China | Nov 1956 | Jul 1958 |
| INISKIN | 88 | United States | Dec 1954 | Mar 1962 |
| INJE | 252 | Korea, South | Jan 1973 | Dec 1993 |
| INJUNE POST OFFICE | 545 | Australia | Mar 1967 | Sep 2013 |
| INKOO BAGASKAR | 608 | Finland | Sep 1962 | Aug 2013 |
| INNER CANYON USGS | 334 | United States | Jun 1935 | Jul 1966 |
| INNER WHALEBACKS | 101 | Canada | Jul 2004 | Oct 2013 |
| INNER WHALEBACKS, NWT | 238 | Canada | Sep 1988 | Oct 2013 |
| INNISFAIL POST OFFICE | 1258 | Australia | Jan 1908 | Sep 2013 |
| INNOKO FLATS ALASKA | 212 | United States | Apr 1988 | Oct 2013 |
| INNSBRUCK-FLUGHAFEN (AUTOMAT) | 2827 | Austria | Jan 1777 | Oct 2013 |
| INONGO | 396 | Zaire | Jan 1951 | Nov 1990 |
| INOWROCLAW | 123 | Poland | Jun 2002 | Oct 2013 |
| INOWROCLAW | 101 | Poland | May 2004 | Oct 2013 |
| INSANE ASYLUM | 257 | United States | Jan 1905 | Dec 1929 |
| INSINGER | 99 | Canada | Mar 1979 | Sep 1987 |
| INSKIP INN | 502 | United States | Mar 1907 | Apr 1954 |
| INST GEOGRAF A CODAZZI COLOMBI | 1040 | Colombia | Jan 1923 | Oct 2013 |
| INSTITUTE WERTZ FIELD | 127 | United States | Apr 1937 | Nov 1947 |
| INSTOW | 274 | Canada | Nov 1950 | Jun 1976 |
| INTERIOR 3 NE | 802 | United States | Nov 1897 | Sep 2013 |
| INTERLAKEN | 375 | Switzerland | Aug 1982 | Oct 2013 |
| INTERNATIONAL | 71 | United States | Feb 1910 | Mar 1929 |
| INTERNATIONAL FALLS INT'L ARP | 1009 | United States | Jul 1906 | Oct 2013 |
| INTORSURA BUZAULUI | 266 | Romania | Jan 1979 | Sep 2002 |
| INTRACOASTAL CITY | 116 | United States | Aug 1981 | Jun 1994 |
| INTRICATE BAY | 553 | United States | Aug 1959 | May 2006 |
| INUKJUAK | 51 | Canada | Jan 1973 | Jun 1977 |
| INUKJUAK ARPT(SAWR) | 1096 | Canada | Nov 1921 | Oct 2013 |
| INUVIK AWOS A | 79 | Canada | Jan 2006 | Jun 2013 |
| INUVIK CLIMATE NWT | 1047 | Canada | Jul 1926 | Oct 2013 |
| INUVIK CS /NWT. | 77 | Canada | Jun 2005 | Sep 2013 |
| INUVIK UA | 15 | Canada | Jan 2004 | Jul 2005 |
| INVERBERVIE NO.2 | 301 | United Kingdom | Dec 1987 | Oct 2013 |
| INVERCARGILL | 102 | New Zealand | Jan 1951 | Jun 1959 |
| INVERCARGILL AERO AWS | 72 | New Zealand | Jul 2005 | Sep 2013 |
| INVERCARGILL AERODROME | 1423 | New Zealand | Jan 1865 | Oct 2013 |
| INVERCARGILL AWS | 370 | New Zealand | Mar 1954 | May 1995 |
| INVERELL (INVERELL RESEAR | 1626 | Australia | Mar 1874 | Aug 2013 |
| INVERELL /RAGLAN ST | 83 | Australia | Mar 1998 | Feb 2005 |
| INVERGORDON HARBOUR | 198 | United Kingdom | Jul 1984 | Jan 2001 |
| INVERMERE,BC | 411 | Canada | Dec 1912 | Apr 1949 |
| INVERNESS | 96 | Canada | Jan 1973 | Jan 1982 |
| INVERNESS | 48 | United States | Sep 2009 | Oct 2013 |
| INVERNESS (MARS) | 170 | Canada | Mar 1973 | Oct 2000 |
| INVERNESS 3 SE | 1302 | United States | Feb 1899 | Oct 2013 |
| INVERNESS-3SE | 1030 | United States | Feb 1899 | Dec 1990 |
| INVERNESS/DALCROSS | 483 | United Kingdom | Jan 1973 | Oct 2013 |
| INVERWAY | 113 | Australia | Oct 1969 | Jul 1987 |
| INWOOD | 164 | United States | Jan 1923 | Sep 1948 |
| INWOOD 2 SW | 815 | United States | Jan 1904 | Jan 1973 |
| INYA-IN-KHABAROV | 70 | Russia | May 1959 | Jul 1976 |
| INYOKERN | 705 | United States | Jul 1948 | May 2010 |
| INYOKERN KERN COUNTY | 212 | United States | Jan 1995 | Sep 2013 |
| INZA | 861 | Russia | Jan 1936 | Oct 2013 |
| IOANNINA (AIRPORT) | 75 | Greece | Mar 1967 | Oct 2013 |
| IOLA 1 W | 1297 | United States | Sep 1905 | Oct 2013 |
| IOLI | 254 | Russia | Nov 1958 | Jun 1993 |
| IONE | 34 | United States | Jan 1915 | Apr 1918 |
| IONIA | 43 | United States | May 1945 | May 1968 |
| IONIA | 23 | United States | Jan 1894 | Dec 1895 |
| IONIA 2 SSW | 908 | United States | Sep 1896 | Oct 2013 |
| IONIA CO | 43 | United States | Dec 2009 | Jul 2013 |
| IOSEPA SOUTH RANCH | 146 | United States | Sep 1910 | Nov 1958 |
| IOWA CITY | 1423 | United States | Jan 1893 | Oct 2013 |
| IOWA CITY MUNICIPAL AP | 319 | United States | Feb 1944 | Oct 2013 |
| IOWA CO AP | 189 | United States | Mar 1997 | Oct 2013 |
| IOWA FALLS MUNI | 64 | United States | Nov 2007 | Jul 2013 |
| IOWA FALLS MUNI AP | 1426 | United States | Jan 1893 | Oct 2013 |
| IOWA HILL | 148 | United States | Nov 1904 | May 1948 |
| IOWA PARK EXP STN | 284 | United States | May 1939 | Mar 1964 |
| IOWA-FALLS | 1261 | United States | Nov 1863 | Dec 1990 |
| IPIALES/SAN LUIS | 470 | Colombia | May 1966 | Oct 2013 |
| IPOH AERODOME | 463 | Malaysia | Jan 1938 | Dec 1980 |
| IPOH MALAYSIA I | 240 | Malaysia | Jan 1961 | Dec 2000 |
| IPSALA | 311 | Turkey | Jan 1964 | Dec 1990 |
| IPSWICH | 1160 | United States | Dec 1894 | Oct 2013 |
| IPSWICH COMPOSITE | 832 | Australia | Jan 1913 | Dec 1993 |
| IQALUIT (FROBISHER BAY) | 859 | Canada | Apr 1942 | Oct 2013 |
| IQALUIT AIRP. CS /NWT. | 60 | Canada | Jan 2000 | Feb 2005 |
| IQALUIT UA | 35 | Canada | Jan 2004 | Apr 2007 |
| IQUIQUE (ISL | 560 | Chile | Jan 1886 | Dec 1969 |
| IQUIQUE DIEGO ARACENA | 971 | Chile | Jan 1900 | Oct 2013 |
| IQUITOS | 774 | Peru | Jan 1949 | Oct 2013 |
| IRA | 45 | United States | May 1900 | Oct 1904 |
| IRAEL | 621 | Russia | Jul 1959 | Sep 2012 |
| IRAEL | 130 | Russia | Aug 1975 | Sep 1994 |
| IRAI | 260 | Brazil | Jan 1979 | Dec 2010 |
| IRAKO | 796 | Japan | Jan 1947 | Oct 2013 |
| IRANSHAHR | 538 | Iran | May 1964 | Oct 2013 |
| IRAPUATO | 868 | Mexico | Aug 1903 | Nov 1998 |
| IRASBURG 1SW | 70 | United States | Oct 1893 | Sep 2013 |
| IRATI | 264 | Brazil | Dec 1978 | Dec 2011 |
| IRBED | 379 | Jordan | Jul 1978 | Oct 2013 |
| IRBEJSKOE | 349 | Russia | Jul 1961 | Oct 2013 |
| IRBID | 490 | Jordan | Jan 1955 | Oct 1998 |
| IRDNING/GUMPENSTEIN | 16 | Austria | Sep 1991 | Apr 1995 |
| IRECE | 5 | Brazil | Feb 1979 | Sep 1979 |
| IRENE | 83 | United States | Mar 1910 | Jan 1918 |
| IRENE - WK | 216 | South Africa | Jan 1975 | Jul 1993 |
| IRGIS | 1180 | Kazakhstan | Jan 1863 | Dec 2005 |
| IRHT | 7 | Tajikistan | Dec 1975 | Jan 1977 |
| IRIGOYEN AEROPUERTO ARGENTI | 108 | Argentina | Jul 1994 | Jul 2007 |
| IRINGA | 164 | Tanzania | Jan 1957 | Oct 2013 |
| IRIOMOTEJIMA | 133 | Japan | Aug 2002 | Oct 2013 |
| IRISH TAYLOR | 275 | United States | Oct 1989 | Oct 2013 |
| IRKUTSK OBSERVATORY | 1995 | Russia | Aug 1820 | Oct 2013 |
| IRON | 18 | United States | Nov 1895 | Dec 1897 |
| IRON BRIDGE DAM | 218 | United States | May 1975 | Dec 1993 |
| IRON MOUNTAIN | 935 | United States | Jan 1935 | Oct 2013 |
| IRON MOUNTAIN | 65 | United States | Jun 1899 | Jan 1906 |
| IRON MOUNTAIN FORD AP | 488 | United States | Jan 1973 | Oct 2013 |
| IRON MTN KINGSFORD WWTP | 1350 | United States | Feb 1899 | Aug 2013 |
| IRON RANGE AUSTRALIA | 22 | Australia | Oct 1942 | Sep 1944 |
| IRON RIVER | 405 | United States | Sep 1909 | Apr 1947 |
| IRON RIVER,AL | 576 | Canada | Jul 1925 | Aug 1975 |
| IRON SPRINGS AGDM | 108 | Canada | Jun 2004 | Oct 2013 |
| IRON SPRINGS AGDM, ALTA | 108 | Canada | Nov 2004 | Oct 2013 |
| IRON SPRINGS ARIZONA | 257 | United States | Feb 1986 | Oct 2013 |
| IRON-MOUNTAIN-KINGSF | 1077 | United States | Feb 1899 | Dec 1990 |
| IRONSIDE 2 W | 483 | United States | Dec 1955 | Jul 2004 |
| IRONSTONE LO | 8 | Canada | Jun 2005 | Aug 2007 |
| IRONTON 1 NE | 1015 | United States | Jan 1900 | Dec 1985 |
| IRONWOOD | 1336 | United States | Aug 1901 | Oct 2013 |
| IRONWOOD | 11 | United States | Jan 2005 | Dec 2005 |
| IROQUOIS FALLS,ON | 943 | Canada | Apr 1913 | Aug 1998 |
| IROZAKI | 888 | Japan | Jun 1939 | Oct 2013 |
| IRRIGATION HEADQUARTES | 8 | United States | Apr 1940 | May 1942 |
| IRUMA JOHNSON | 659 | Japan | Oct 1946 | Oct 2013 |
| IRUMKA-IN-KHABAROV | 105 | Russia | Jan 1969 | Dec 1981 |
| IRVINE AGCM, ALTA | 66 | Canada | Apr 2008 | Oct 2013 |
| IRVINGTON | 906 | United States | Sep 1897 | Dec 1973 |
| IRVINS RANCH | 57 | United States | Nov 1938 | Jul 1945 |
| IRWIN | 677 | United States | Apr 1941 | Nov 1997 |
| IRWIN | 659 | United States | Sep 1896 | Oct 1957 |
| IRWIN | 26 | United States | Jan 1893 | Mar 1896 |
| IRWIN 2 SE | 578 | United States | Jun 1909 | Jun 1960 |
| IRWINTON 4 WNW | 528 | United States | Oct 1956 | Apr 2011 |
| IS. DE PASCUA | 840 | Chile | Jan 1942 | Oct 2013 |
| ISABEL | 28 | United States | Nov 1920 | Jul 1925 |
| ISABEL MARIA | 240 | Ecuador | Jan 1961 | Dec 1980 |
| ISABEL MARIA | 118 | Ecuador | Jan 1961 | Dec 1970 |
| ISABEL RUBIO PINAR | 78 | Cuba | Aug 1974 | Dec 1982 |
| ISABEL RUBIO, PINAR DEL RIO | 119 | Cuba | Feb 1952 | Dec 1981 |
| ISABEL SEGUNDA / VIE | 30 | Puerto Rico [United States] | May 2009 | Oct 2013 |
| ISABELA SUBSTATION | 1209 | Puerto Rico [United States] | Jan 1901 | Sep 2013 |
| ISABELLA | 39 | United States | Mar 1902 | Dec 1905 |
| ISABELLA 1 W | 366 | United States | Sep 1957 | Jul 2005 |
| ISABELLA 14W | 44 | United States | Nov 2009 | Oct 2013 |
| ISABELLA 3 W | 45 | United States | Sep 2009 | Sep 2013 |
| ISABELLA MINNESOTA | 125 | United States | Jun 2003 | Oct 2013 |
| ISACHENKO ISLAND | 376 | Russia | Feb 1958 | Jan 1994 |
| ISACHSEN (AUT), NT | 40 | Canada | Aug 1997 | Dec 2000 |
| ISACHSEN (AUT), NU | 565 | Canada | May 1948 | Sep 2013 |
| ISACHSEN (MAPS) | 361 | Canada | May 1948 | May 1978 |
| ISAFJORDUR | 29 | Iceland | Feb 2011 | Oct 2013 |
| ISAMBAJ | 148 | Tajikistan | Dec 1975 | Oct 2013 |
| ISCHGL/IDALPE | 243 | Austria | Dec 1990 | Oct 2013 |
| ISCHIM AMSG | 904 | Russia | Jan 1936 | Jul 2013 |
| ISCIA BAIDOA | 392 | Somalia | Jan 1922 | Dec 1970 |
| ISEDOR IVERSON AP | 112 | United States | Jun 2004 | Oct 2013 |
| ISENVAD | 17 | Denmark | May 2012 | Oct 2013 |
| ISFARA | 187 | Tajikistan | Jul 1949 | Dec 1995 |
| ISFJORD RADIO SPITSBERGEN | 726 | Norway | May 1912 | Jun 1976 |
| ISHIGAKISHIMA | 1401 | Japan | Jan 1897 | Oct 2013 |
| ISHINOMAKI | 1511 | Japan | Sep 1887 | Oct 2013 |
| ISHKASHIM | 39 | Tajikistan | Dec 1975 | Mar 1995 |
| ISHUN' | 28 | Ukraine | Jan 2000 | Apr 2004 |
| ISHURDI | 210 | Bangladesh | Feb 1979 | Sep 2010 |
| ISILKUL | 515 | Russia | Nov 1948 | Oct 2013 |
| ISIRO | 355 | Zaire | Jan 1951 | Dec 1980 |
| ISISFORD POST OFFICE | 1117 | Australia | Jan 1913 | Sep 2013 |
| ISIT' | 904 | Russia | Jan 1936 | Oct 2013 |
| ISKELE | 57 | Cyprus | Aug 2008 | Oct 2013 |
| ISKENDERUN | 634 | Turkey | Jan 1961 | Oct 2013 |
| ISKUT RANCH | 147 | Canada | Jul 1976 | Apr 1994 |
| ISKUT RIVER | 59 | Canada | Jul 1992 | Aug 2001 |
| ISLA DIEGO RAMIREZ | 284 | Chile | Aug 1975 | May 2009 |
| ISLA GUADALUPE, B.C. | 139 | Mexico | Jan 1949 | Apr 1985 |
| ISLA GUAFA | 676 | Chile | Jan 1910 | Jan 2005 |
| ISLA HUAFO ( | 582 | Chile | Jan 1908 | Dec 1967 |
| ISLA JUAN FE | 564 | Chile | Jan 1901 | Dec 1970 |
| ISLA JUAN FER | 1308 | Chile | Jan 1901 | Oct 2013 |
| ISLA JUAN FERNANDEZ | 1308 | Chile | Jan 1901 | Oct 2013 |
| ISLA MARIA MADRE | 17 | Mexico | Mar 1989 | Sep 1994 |
| ISLA MOCHA ( | 367 | Chile | May 1899 | Dec 1981 |
| ISLA MOCHA ( | 241 | Chile | Apr 1899 | May 1925 |
| ISLA ORCHILA | 346 | Venezuela | Jun 1958 | Sep 2013 |
| ISLA PEREZ | 6 | Mexico | Feb 2012 | Oct 2013 |
| ISLA SANTA M | 372 | Chile | Jan 1899 | Dec 1970 |
| ISLA SOCORRO, COL. | 98 | Mexico | Mar 1977 | Aug 1998 |
| ISLA TRINDADE | 134 | Brazil | Aug 2001 | Sep 2013 |
| ISLAHIYE | 360 | Turkey | Jan 1961 | Dec 1990 |
| ISLAMABAD AIRPORT | 361 | Pakistan | Aug 1975 | Oct 2013 |