US Amateur Callsign System Rules & Examples


About Letters, Region Numbers, Prefixes & Suffixes

Each call sign has a one letter prefix (K, N, W) or a two letter prefix (AA-AL, KA-KZ, NA-NZ, WA-WZ) and a one, two, or three letter suffix separated by a numeral (0-9) indicating the geographic region. Certain combinations of letters are not used. When the call signs in any regional-group list are exhausted, the selection is made from the next lower group.

1x1 = 1 letter prefix + region number + 1 letter suffix. e.g. N7A (reserved for temporary special events)
1x2 = 1 letter prefix + region number + 2 letter suffix. e.g. W1CD
2x1 = 2 letter prefix + region number + 1 letter suffix. e.g. AC6V
2x2 = 2 letter prefix + region number + 2 letter suffix. e.g. WA4CC
1x3 = 1 letter prefix + region number + 3 letter suffix. e.g. N1CAD
2x3 = 2 letter prefix + region number + 3 letter suffix. e.g. WA6AEK

Also see here for more history on callsigns.

 

Group A - Amateur Extra Class
Primary stations licensed to Amateur Extra class operators.
Region Prefix Where Letters in Suffix Examples
1-10 K, N, or W, and two letter suffix; Continental US 2 (1x2) K0EE, N1EE, W2EE
two letter prefix with first letter A, N, K, or W Continental US 1 (2x1) AE0E, NE1E, KE2E, WE3E
two letter prefix with first letter A Continental US 2 (2x2) AE0EE
11 AL, KL, NL, or WL Alaska 1 (2x1) AL0E, KL1E, NL2E, WL3E
12 KP, NP, or WP Caribbean Insular areas 1 (2x1) NP2E, KP3E, WP2E
13 AH, KH, NH, or WH Hawaii and Pacific Insular areas 1 (2x1) AH0E, KH1E, NH2E
Group B - Advanced Class
Primary stations licensed to Advanced class operators.
Region Prefix Where Letters in Suffix Examples
1-10 Two letter prefix with first letter K, N, or W Continental US 2 (2x2) KE0EE, NE1EE, WE2EE
11 AL Alaska 2 (2x2) AL0EE
12 KP Caribbean Insular areas 2 (2x2) KP2EE
13 AH Hawaii and Pacific Insular areas 2 (2x2) AH0EE
Group C - General, Technician, and Technician Plus Classes
Primary stations licensed to General, Technician, and Technician Plus class operators.
Region Prefix Where Letters in Suffix Examples
1-10 K, N, or W Continental US 3 (1x3) K0EEE, N1EEE, W2EEE
11 KL, NL, or WL Alaska 2 (2x2) KL0EE, NL1EE, WL2EE
12 NP or WP Caribbean Insular areas 2 (2x2) NP2EE, WP3EE
13 KH, NH, or WH Hawaii and Pacific Insular areas 2 (2x2) KH0EE, NH1EE, WH2EE
Group D - Novice, Club, and Military Recreations Station
Primary stations licensed to Novice class operators, and for club and military recreation stations.
Region Prefix Where Letters in Suffix Examples
1-10 Two letter prefix with first letter K or W Continental US 3 (2x3) KE0EEE, WE0EEE
11 KL or WL Alaska 3 (2x3) KL0EEE, WL0EEE
12 KP or WP Caribbean Insular areas 3 (2x3) KP1EEE, WP2EEE
13 KH or WH Hawaii and Pacific Insular areas 3 (2x3) KH0EEE, WH1EEE

 

Geographic Region-based Numerals
Region States & Other Areas Numeral Examples
1 Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont 1 AE1E, KE1E, NE1EE, WE1EEE
2 New Jersey and New York 2 AE2E, KE2E, NE2EE, WE2EEE
3 Delaware, District of Columbia, Maryland and Pennsylvania 3 AE3E, KE3E, NE3EE, WE3EEE
4 Alabama, Florida, Georgia, Kentucky, North Carolina, South Carolina, Tennessee and Virginia 4 AE4E, KE4E, NE4EE, WE4EEE
5 Arkansas, Louisiana, Mississippi, New Mexico, Oklahoma and Texas 5 AE5E, KE5E, NE5EE, WE5EEE
6 California 6 AE6E, KE6E, NE6EE, WE6EEE
7 Arizona, Idaho, Montana, Nevada, Oregon, Utah, Washington and Wyoming 7 AE7E, KE7E, NE7EE, WE7EEE
8 Michigan, Ohio and West Virginia 8 AE8E, KE8E, NE8EE, WE8EEE
9 Illinois, Indiana and Wisconsin 9 AE9E, KE9E, NE9EE, WE9EEE
10 Colorado, Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota and South Dakota 0 AE0E, KE0E, NE0EE, WE0EEE
11 Alaska
KL9KAA-KL9KHZ is reserved for assignment to U.S. personnel stationed in Korea.
1-10 AL0E, AL1EE, KL0EE, NL1EE, WL2EE, KL0EEE, WL0EEE
12 Caribbean Insular areas:
Navassa Island 1 KP1E, NP1EE, WP1EEE
Virgin Islands 2 NP2E, NP2EE, WP2EEE
Commonwealth of Puerto Rico except Desecheo Island 3 or 4 NP3E, NP4EE, WP3EEE
Desecheo Island 5 NP5E, N52EE, WP5EEE
13 Hawaii and Pacific Insular areas:
Baker or Howland Island 1 AH1E, KH1E, NH1EE, WH1EEE
Guam 2 AH2E, KH2E, NH2EE, WH2EEE
Johnston Island 3 AH3E, KH3E, NH3EE, WH3EEE
Midway Island 4 AH4E, KH4E, NH4EE, WH4EEE
Palmyra or Jarvis Island 5 AH5E, KH5E, NH5EE, WH5EEE
Kingman Reef 5 followed by suffix letter K AH5K, KH5K, NH5EK, WH5EEK
Hawaii except Kure Island 6 or 7 AH6E, KH6E, NH6EE, WH6EEE
Kure Island 7 followed by the letter K AH7K, KH7K, NH7EK, WH7EEK
American Samoa 8 AH8E, KH8E, NH8EE, WH8EEE
Wake, Wilkes, or Peale Island 9 AH9E, KH9E, NH9EE, WH9EEE
Commonwealth of Northern Mariana Islands 0 AH0E, KH0E, NH0EE, WH0EEE
14 (unofficial). Outside the United States    

 

Note: The following call signs are not available for assignment:
KA2AA-KA9ZZ, KC4AAA-KC4AAF, KC4USA-KC4USZ, KG4AA-KG4ZZ, KC6AA-KC6ZZ, KL9KAA- KL9KHZ, KX6AA-KX6ZZ;
Any call sign having the letters SOS or QRA-QUZ as the suffix;
Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU);
Any 2-by-3 format call sign having the letter X as the first letter of the suffix;
Any 2-by-3 format call sign having the letters AF, KF, NF, or WF as the prefix and the letters EMA as the suffix (U.S Government FEMA stations);
Any 2-by-3 format call sign having the letters AA-AL as the prefix;
Any 2-by-3 format call sign having the letters NA-NZ as the prefix;
Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs);
Any 2-by-3 format call sign having the letters KP, NP or WP as the prefix and the numeral 0, 6, 7, 8 or 9;
Any 2-by-2 format call sign having the letters KP, NP or WP as the prefix and the numeral 0, 6, 7, 8 or 9;
Any 2-by-1 format call sign having the letters KP, NP or WP as the prefix and the numeral 0, 6, 7, 8 or 9;
Call signs having the single letter prefix (K, N or W), a single digit numeral 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and a single letter suffix are reserved for the special event call sign system. i.e 1x1

This page last updated January 10 2010

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