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2. Mobile number portability - Wikipedia

   en.wikipedia.org/wiki/Mobile_number_portability

   A key technical aspect of Mobile Number Portability (MNP) involves the routing of calls or mobile messages (SMS, MMS) to a number once it has been ported. Various call routing implementations exist globally, but the International and European best practice employs a central database (CDB) of ported numbers. Network operators replicate the CDB ...

3. Local number portability - Wikipedia

   en.wikipedia.org/wiki/Local_number_portability

   Local number portability (LNP) for fixed lines, and full mobile number portability (FMNP) for mobile phone lines, refers to the ability of a "customer of record" of an existing fixed-line or mobile telephone number assigned by a local exchange carrier (LEC) to reassign the number to another carrier ("service provider portability"), move it to another location ("geographic portability"), or ...

4. Number Portability Administration Center - Wikipedia

   en.wikipedia.org/wiki/Number_Portability...

   The Number Portability Administration Center (NPAC) is a function of the Federal Communications Commission (FCC) in the United States. It administers the routing of telephone calls and text messages (SMS) for the telecommunications industry and its customers in the regions of the North American Numbering Plan . [ 1 ]

5. Location routing number - Wikipedia

   en.wikipedia.org/wiki/Location_Routing_Number

   Location routing number. A location routing number ( LRN) is an identification for a telephone switch for the purpose of routing telephone calls through the public switched telephone network (PSTN) in the United States. This identification has the format of a telephone number, in accordance with the North American Numbering Plan (NANP).

6. One Tech Tip: Protecting yourself against SIM swapping - AOL

   www.aol.com/news/one-tech-tip-protecting...

   AT&T also advises contacting your carrier to set up a unique passcode to prevent significant account changes such as porting phone numbers to another carrier. Your carrier may already have other ...

7. One Tech Tip: What to do if your personal info has been ... - AOL

   www.aol.com/news/one-tech-tip-personal-exposed...

   To reduce that risk, AT&T advises also setting up a unique passcode that's needed to prevent significant account changes such as porting phone numbers to another carrier. Also, delete phone bills ...

8. Telephone number pooling - Wikipedia

   en.wikipedia.org/wiki/Telephone_number_pooling

   Telephone number pooling. Telephone number pooling, thousands-block number pooling, or just number pooling, is a method of allocating telephony numbering space of the North American Numbering Plan in the United States. The method allocates telephone numbers in blocks of 1,000 consecutive numbers of a given central office code to telephony ...

9. FXO and FXS - Wikipedia

   en.wikipedia.org/wiki/FXO_and_FXS

   Local number portability allows an existing number to be moved to VoIP (or, in some countries, a mobile telephone) which can then be freely moved out of the original geographic location while keeping the directory listing and service area unchanged. A foreign exchange office (FXO) device plays the role of an analog phone.