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Hide your caller ID for individual calls For example, if your Google Voice number is from the US, your prefix is “*67.” You always use the same prefix for all numbers you call.

Star 69 refers to "last-call return," the Calling Feature Vertical service code *69 keyed on a landline telephone set in order to return the call of the last one to ring (in Canada and the United States).

*69 - Call Return: Redials the last number that called you. *70 - Call Waiting: Places your call on hold so you can answer another. *72 - Call Forwarding: Forward your call to another phone number. *77 - Anonymous Call Rejection: Blocks calls from private callers.

The first one is *69, which traces the number of the last person who called you. It works even for anonymous or hidden calls, so you can get the phone number and the exact time they called. Once you have that hidden phone number, you can block it on your phone, so it can't call you anymore.

It's surprisingly simple: The moment you dial *67, your phone sends a signal to your provider requesting a caller ID block. From that point forward, your outgoing calls become shrouded in mystery, appearing as "private" or a "blocked number" on the recipient's end.

The originating telephone service provider checks the call source and calling number to determine how to attest for the validity of the calling number. Full Attestation (A) — The service provider has authenticated the calling party and they are authorized to use the calling number.

Gateway Attestation (C) - The identity of the caller is not known, as the call originated outside of the network, or internationally. C level is applied when A or B cannot be.

This Vertical Service Code, *82, enables calling line identification regardless of subscriber preference, dialed to unblock withheld numbers (private callers) in the U.S. on a per-call basis.

Hide your caller ID for individual calls For example, if your Google Voice number is from the US, your prefix is “*67.” You always use the same prefix for all numbers you call.

Star 69 refers to "last-call return," the Calling Feature Vertical service code *69 keyed on a landline telephone set in order to return the call of the last one to ring (in Canada and the United States).

*69 - Call Return: Redials the last number that called you. *70 - Call Waiting: Places your call on hold so you can answer another. *72 - Call Forwarding: Forward your call to another phone number. *77 - Anonymous Call Rejection: Blocks calls from private callers.

The first one is *69, which traces the number of the last person who called you. It works even for anonymous or hidden calls, so you can get the phone number and the exact time they called. Once you have that hidden phone number, you can block it on your phone, so it can't call you anymore.

It's surprisingly simple: The moment you dial *67, your phone sends a signal to your provider requesting a caller ID block. From that point forward, your outgoing calls become shrouded in mystery, appearing as "private" or a "blocked number" on the recipient's end.

The originating telephone service provider checks the call source and calling number to determine how to attest for the validity of the calling number. Full Attestation (A) — The service provider has authenticated the calling party and they are authorized to use the calling number.

Gateway Attestation (C) - The identity of the caller is not known, as the call originated outside of the network, or internationally. C level is applied when A or B cannot be.

This Vertical Service Code, *82, enables calling line identification regardless of subscriber preference, dialed to unblock withheld numbers (private callers) in the U.S. on a per-call basis.