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3. Formation of call sign - Call sign is composed of three parts: 1- prefix, 2- amateur radio district number, 3 - suffix.

Often suffixes are added to a ham radio call sign. When a station is operating from an automobile it will use the suffix /M for mobile. The suffix /P may be used for portable operation, and /MM for maritime mobile.Instead the home callsign is used with the prefix of the country where the station is located.

An easy method for finding your FRN for a particular license is to query the ULS "License Search" function. Go to the FCC ULS page http://wireless.fcc.gov/uls/ Enter a specific call sign, and select "Search." Your FRN will appear on your License record.

Amateur Radio Service A unique call sign is assigned to each amateur station during the processing of its license applications. Each new call sign is assigned sequentially using the sequential call sign system, which is based on the alphabetized regional-group list for the licensee's operator class and mailing address.

Go to http://wireless.fcc.gov/uls.Click the Licenses button.You will then get the search form. In the drop down box, choose to search By Name, then type in your last name, or your last name and first name separated by a comma.If you get a match, you will see your name along with your callsign.

CALL SIGN SUFFIX: The suffix can be one, two or three alphabet letters. Single-letter suffixes are all letters A through Z. Two-letter combinations are all between AA and ZZ. Three letter combinations are AAA through ZZZ.

A call sign can be formally assigned by a government agency, informally adopted by individuals or organizations, or even cryptographically encoded to disguise a station's identity. The use of call signs as unique identifiers dates to the landline railroad telegraph system.