無線 むせん呼出 よびだし符号 ふごうじゃなかったです
musen'yobidashifugōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 無線呼出符号

1. Wasn't a call sign.; Wasn't a radio call sign.

Past/Perfective
Negative
Polite
Casual Register