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  2. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    979 – Universal International Premium Rate Service (UIPRS);(formerly assigned to Abu Dhabi, now part of 971 United Arab Emirates) 98 – Iran. 990 – unassigned. 991 – unassigned (formerly used for International Telecommunications Public Correspondence Service) 992 – Tajikistan.

  3. Caller ID - Wikipedia

    en.wikipedia.org/wiki/Caller_ID

    Caller ID. 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. The caller ID service may include the transmission of a name associated with ...

  4. The mystery behind those creepy 'Unknown' spam calls - AOL

    www.aol.com/news/mystery-behind-those-creepy...

    The mystery behind these creepy 'Unknown' spam calls often begins with data breaches or information leaks. Scammers obtain partial information from various sources, including public records ...

  5. Caller ID spoofing - Wikipedia

    en.wikipedia.org/wiki/Caller_ID_spoofing

    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.

  6. This is why you should never call back an unknown number - AOL

    www.aol.com/article/lifestyle/2019/05/03/this-is...

    So just because a number shares your area code doesn’t mean the caller is from your town. Crooks purposely use familiar area codes to gain your trust. Don’t miss these other sneaky ways con ...

  7. International gateway - Wikipedia

    en.wikipedia.org/wiki/International_gateway

    International gateway. An International Gateway is a telephone number through which calls are routed to get cheaper rates on international long distance charges, or to make calls through voice over IP (VOIP) networks internationally. They also are effective in making an international call into the US appear as if it is originating from a local ...

  8. Truth in Caller ID Act of 2009 - Wikipedia

    en.wikipedia.org/wiki/Truth_in_Caller_ID_Act_of_2009

    The Truth in Caller ID Act of 2009 is an Act of the United States Congress that generally makes it illegal to use false Caller ID information for a call with the intent to defraud or scam a called party. The Act makes exceptions for certain law-enforcement purposes. Callers are also still allowed to preserve their anonymity by choosing to block ...

  9. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    An intermediary machine or process rejected the call attempt. [25] This contrasts with the 607 (Unwanted) SIP response code in which a human, the called party, rejected the call. The intermediary rejecting the call should include a Call-Info header with "purpose" value "jwscard", with the jCard [26] with contact details. The calling party can ...