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Definition of International call sign
1. Noun. (military) A call sign assigned in accordance with the provisions of the International Telecommunications Union to identify a radio station. The nationality of the radio station is identified by the first or the first two characters. (When used in visual signaling, international call signs are referred to as “signal letters.”) ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of International Call Sign
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