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From: KFL@AI.AI.MIT.EDU.UUCP
Newsgroups: mod.telecom
Subject: Radio call letters
Message-ID: <172329.870323.KFL@AI.AI.MIT.EDU>
Date: Mon, 23-Mar-87 00:11:40 EST
Article-I.D.: AI.172329.870323.KFL
Posted: Mon Mar 23 00:11:40 1987
Date-Received: Thu, 26-Mar-87 04:29:17 EST
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I don't know where it is written down, but call letter prefixes
are allocated by some international agency.  The United States
has AA through AL, and all of K, N, and W.  Canada has C and V.
Mexico has X.  Every letter and every number prefix is allocated
except no stations begin with Q.

For broadcast stations, the FCC has ruled that stations East of the
Mississippi begin with W, West of the Mississippi begin with K.  (A
very few early stations such as KDKA break this rule.)
								...Keith