How to Block a Blocked Caller

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Caller ID is a feature that comes standard with many phone plans. It allows a call recipient to know where a call is coming from prior to actually answering a call. Whenever someone places a phone call, the caller ID information associated with the phone used is transmitted to the call recipient's caller ID display. This information includes the phone number and the name connected to the telephone account. Opting for anonymity, a caller can place a caller ID block on a phone to block the transmission of their caller ID information. Conversely, a call recipient can choose to reject calls from blocked callers.

  • Pick up your telephone handset. If you're using a cordless phone, activate the "Call" or "Talk" mode on the phone to get a dial tone.

  • Listen for the dial tone.

  • Dial *77 if you are using a touch-tone phone. Dial 1177 if you are using a pulse or rotary dial phone.

  • Place the telephone handset back to your ear. You should hear a confirmation tone or pre-recorded message indicating that the anonymous call block feature is now activated. When the anonymous call block feature is turned on, calls placed from phones with blocked numbers are rejected. Instead, whenever a call is placed to your phone number from a phone which has the caller ID block feature activated, the would-be "anonymous," "private," or "unknown" caller hears a message which instructs them to hang up and dial your phone number again after deactivating their caller ID block. The anonymous call block feature works with only in-state callers. Out-of-state callers with blocked numbers are not rejected.

Tips & Warnings

  • To deactivate the anonymous call block feature on your phone, dial *87 from a touch-tone phone. Dial 1187 from a pulse or rotary dial phone. With the anonymous call block feature turned off, your phone will once again accept calls from "anonymous," "private," or "unknown" numbers.
  • The anonymous call block feature is typically available with most landline phone plans. However, this is not a standard feature offered with cellphone plans. Check with your wireless service provider to see if your plan allows you to reject blocked numbers on your cellphone.

References

  • Photo Credit Jupiterimages/Polka Dot/Getty Images
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