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Call signs begin with a one- two- or three-character prefix chosen from a range assigned by the ITU to the amateur's country of operation or other internationally recognized jurisdiction. Each station is assigned a call sign which is used to identify the station during transmissions.The beginning of the list of call sign ranges is:Amateur station call signs in the US take the format of one or two letters (the prefix), then a numeral (the call district), and finally between one and three letters (the suffix). The number of letters used in the call sign is determined by the operator's license class and the availability of letter combinations.* AAA–ALZ United States of America Call Sign Prefix StateAn amateur operator with an Amateur Extra Class license can hold a call from any of the four call sign groups, either by keeping an existing call sign (indefinitely, since there is no requirement to change call sign upon license renewal), or by choosing a Group B, C or D call sign under the Vanity Licensing Program. -------------------------------------------------------------------------------------------*A - Amateur Extra Class W0 Colorado, Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, South Dakota*B - Advanced Class W1 Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont*C - Technician or General W2 New Jersey, New York*D - Club, and Military Recreations Stations; and sequentially to Technician or General W3 Delaware, D.C., Maryland, Pennsylvania W4 Alabama, Florida, Georgia, Kentucky, North Carolina, South Carolina, Tennessee, Virginia W5 Arkansas, Louisiana, Mississippi, New Mexico, Oklahoma, Texas W6 California W7 Arizona, Idaho, Montana, Nevada, Oregon, Washington, Utah, Wyoming W8 Michigan, Ohio, West Virginia W9 Illinois, Indiana, Wisconsin AL0-7, KL0-7, NL0-7, WL0-7 Alaska AH6-7, KH6-7, NH6-7, WH6-7 HawaiiWhile the prefix uniquely identifies a country the suffix is unique for the individual. In Canada a call sign such as VE3ABC has VE3 (Ontario) as the prefix and ABC as the suffix. In the U.S the call sign N2MG has a prefix of N2 and suffix of MG. U.S. hams may also have a two letter prefix thus AB2Z is a valid call. Suffixes may also be less than three letters so you have call signs such as VE7AB in British Columbia and KH6Y in Hawaii.During the processing of a new license application, a call sign is selected from the available list sequentially using the sequential call sign system. This system is based on the alphabetized regional-group list for the licensee's operator class and mailing address. Call Sign Digit This digit is always a single numeral, 0 (zero) through 9 which usually indicates a geographical area within the continental (lower 48 contiguous) United States. For initially issued call signs, the mailing address of the licensee determines the numeral. Area digits (also between 0 and 9) of ham stations outside of the contiguous U.S. are arbitrarily assigned by the FCC. For example the area digit for American Samoa is the number 8. As of March 2010, the sequential system for Technician or General is assigning 2-by-3 formats beginning with the letter K.