updated with new exception codes 6/10/2006

RDS Callsign Identifier (for USA)

This identifier does not work for non-U.S. stations!

PI code:

Some Canadian stations now work. In some cases, Canadian stations are using the same codes as assigned to U.S. stations. Often, the "C" is replaced by a "W". (so if you see a PI code that resolves to "WING" on 107.9 while the real WING is on 102.9, you're probably actually tuned to CING.
Click here for a "reverse calculator", to get a PI code given call letters.
There is no error checking in this JavaScript. Enter a nonsense PI and you may get a callsign anyway.