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2. Virtual number - Wikipedia

   en.wikipedia.org/wiki/Virtual_number

   A virtual number, also known as direct inward dialing ( DID) or access numbers, is a telephone number without a directly associated telephone line. Usually, these numbers are programmed to forward incoming calls to one of the pre-set telephone numbers, chosen by the client: fixed, mobile or VoIP. A virtual number can work like a gateway between ...

3. Google Voice - Wikipedia

   en.wikipedia.org/wiki/Google_Voice

   Website. voice .google .com. Google Voice is a telephone service that provides a U.S. phone number to Google Account customers [1] in the U.S. and Google Workspace (G Suite by October 2020 [2]) customers in Canada, Denmark, France, the Netherlands, Portugal, Spain, Sweden, Switzerland, the United Kingdom and the contiguous United States. [3]

4. Long number - Wikipedia

   en.wikipedia.org/wiki/Long_number

   A long number (e.g. +44 7624 800555 in international notation or 07624 800555 in UK national notation), also known as a virtual mobile number (VMN), dedicated phone number MSISDN or long code, is a reception mechanism used by businesses to receive SMS messages and voice calls. As well as being internationally available, long numbers enable ...

5. SMS spoofing - Wikipedia

   en.wikipedia.org/wiki/SMS_spoofing

   SMS spoofing. SMS spoofing is a technology which uses the short message service (SMS), available on most mobile phones and personal digital assistants, to set who the message appears to come from by replacing the originating mobile number (Sender ID) with alphanumeric text. Spoofing has both legitimate uses (setting the company name from which ...

6. Short Message Service technical realisation (GSM) - Wikipedia

   en.wikipedia.org/wiki/Short_Message_Service...

   The VMSC will request the information needed for it to deliver the Short Message to its recipient by sending a Send_Info_for_MT_SMS message to the VLR. The VLR will then instigate a page request, or subscriber search, for the destination subscribers Mobile Subscriber ISDN Number (MSISDN), and return the result to the VMSC. Since a typical ...

7. Instant messaging - Wikipedia

   en.wikipedia.org/wiki/Instant_messaging

   SMS was a much more dominant form of communication before smartphones became widely used globally. While SMS relied on traditional paid telephone services, instant messaging apps on mobiles were available for free or a minor data charge. In 2012 SMS volume peaked, and in 2013 chat apps surpassed SMS in global message volume.