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  2. Call blocking - Wikipedia

    en.wikipedia.org/wiki/Call_blocking

    These devices rely on caller ID information and thus a phone blocker requires a caller ID service active on the line for blocking to function. Treatment of blocked calls may include: Sending the caller to voicemail; Sending the caller to busy signal; Sending the caller to "Number No Longer in Service" Sending the caller to "Keep Ringing"

  3. Anonymous call rejection - Wikipedia

    en.wikipedia.org/wiki/Anonymous_call_rejection

    In many voice telephone networks, anonymous call rejection (ACR) is a calling feature implemented in software on the network that automatically screens out calls from callers who have blocked their caller ID information. The caller usually hears a voice message explaining that their call cannot be connected unless they display their number.

  4. Caller ID spoofing - Wikipedia

    en.wikipedia.org/wiki/Caller_ID_spoofing

    Caller ID spoofing is a spoofing attack which causes the telephone network's Caller ID to indicate to the receiver of a call that the originator of the call is a station other than the true originating station. This can lead to a display showing a phone number different from that of the telephone from which the call was placed.

  5. 9 ways scammers can use your phone number to try to trick you

    www.aol.com/news/9-ways-scammers-phone-number...

    Phone number spoofing is a common tactic where scammers disguise their caller ID to appear ... These services do all the work for you by actively monitoring and systematically erasing your ...

  6. Vertical service code - Wikipedia

    en.wikipedia.org/wiki/Vertical_service_code

    Do not disturb *79 1179 Do not disturb disable *80 1180 Call blocking disable *81 1181 Priority call disable *82 1182 Caller ID (per call) *31#/1832 [11] 1470 *83 1183 Selective call forwarding disable *85 1185 Caller ID disable *86 1186 Continuous redial cancel *87 1187 Anonymous call rejection deactivation *88 1188 Deactivate call forwarding ...

  7. Block all senders except for Contacts - AOL Help

    help.aol.com/articles/block-all-senders-except...

    Avoid the frustration of unwanted emails by enabling the option to only receive messages from senders who are in your contact list. If you're expecting messages from a specific sender, be sure to add their email address to Contacts. 1. Click Settings | More Settings. 2. Click Security and privacy tab. 3. Toggle on Block all senders except ...

  8. *82 - Wikipedia

    en.wikipedia.org/wiki/*82

    If Caller ID is subscribed to or enabled on the line receiving the call, the unblocked phone number and registered name is displayed – unable to determine that the caller subscribes to outgoing callerID blocking or that *82 has been dialed to temporarily override that subscription. *82 can be dialed from U.S. land-line house phones and ...

  9. Caller ID - Wikipedia

    en.wikipedia.org/wiki/Caller_ID

    Caller-ID system response sounds in various cases: analog, ISDN and digital PBX Caller identification (Caller ID) is a telephone service, available in analog and digital telephone systems, including voice over IP (VoIP), that transmits a caller's telephone number to the called party's telephone equipment when the call is being set up.