Most often used phrases:
station s call lettersnew call letters
call letters changed
changed call letters
original call letters
current call letters
call letters stand
call letters stood
station call letters
call letters back
assigned call letters
call letters originally
stations call letters
call letters moved
switched call letters
'call letters' used in domains:
callletters.comradiostationcallletters.com
recallletters.com
radiocallletters.com
Statistical data
"call letters" has the frequency of use of 0.0005% on en.wikipedia.org.
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