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Local number portability (LNP) for fixed lines, and full mobile number portability (FMNP) for mobile phone lines, refers to the ability to transfer either an existing fixed-line or mobile telephone number assigned by a local exchange carrier (LEC) and reassign it to another carrier. In most cases, there are limitations to transferability with regards to geography, service area coverage and technology. In the United States, the FCC first mandated LNP among wireline carriers in 1997, as well. LNP was first implemented in the U.S. upon the establishment of the original Number Portability Administration Center (NPAC) in Chicago, Illinois in 1998. This service covered select rate centers in the Ameritech region. Thereafter, as switches and telephone networks were upgraded with Location Routing Number (LRN) capability, LNP was deployed sequentially to the remaining RBOC areas. The U.S. FCC since has mandated Wireless Local Number Portability starting November 24, 2003 and, on November 10, 2003, the FCC additionally ruled that number portability applies to landline numbers moving to mobile telephones as well. |
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40% of all calls terminated into the US are to ported numbers. If your carrier doesn’t route for number portability, then it is mis-routing 40% of your traffic, and may be over charging you for termination. grnVoIP least cost routing with portability correction solves the problem. If your call is destined for a number that has been ported, we will charge you according to the LRN (Location Routing Number) of the central office to which the number has been ported. If that cost is lower than the cost of the actual dialed number, then your cost will be lower as well. In cases where an LRN number is routed, both the dialed number and the LRN are available in the CDRs.
Alternatively, for VoIP Providers that can not pass on LRN costs to their own customers, grnVoIP is also able to offer a SIP route that bills based on DNIS digits and not LRN (these are referred to as non-jurisdictional routes). The rates are slightly higher, though comparable to our standard U.S. rates (which do bill based on LRN and intra-state) and are immediately available. Existing customers may request the non-LRN rates and a new prefix from our 24×7 technical support staff.
