If you don’t know the code, consult your phone bill or search for your carrier’s “vertical service codes.” Crucially, if you blocked the number by using a *60 or *61 code after a call, simply re-entering that code and following the prompts to “delete” will work.
If the number isn't in your *60 list or your handset's block list, it might be blocked by a third-party device. Do you have a separate "Call Blocker" box plugged into your phone jack? If so, you will need to follow the instructions for that specific device (often involves pressing a red button or entering a PIN on the device itself). how to unblock a phone number on a landline
If you are trying to figure out how to make your own number visible to others (unblocking your outbound Caller ID), the story is different. If you don’t know the code, consult your
Unblocking a number is a technical act, but it carries emotional weight. Before you unblock a contact, consider why you blocked them in the first place. If it was a telemarketer, unblocking may invite more spam. If it was a personal contact, prepare for the call to ring again. Once the unblock is complete, test it by having the person call you. If they still cannot reach you, check that your “Do Not Disturb” feature is off and that your ringer volume is up. If so, you will need to follow the
If callers with blocked Caller IDs cannot reach you, but you want them to: