The 01521 dialling code has not yet been allocated to any geographic location.
If you have received a call from a telephone number beginning 01521, it is likely that the caller is spoofing their identity.
Have you been called by a number beginning 01521?
For full numbers beginning 01521, click here to get info on who called.
Numbers beginning 01521 are not currently in use, so a format has not yet been determined.
You cannot currently call numbers beginning 01521 as they are not currently in use.