Local number portability

number portabilityportedportare portableLNPlocalportableported between landline and mobiletelephone number portingUK number portability scheme
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 change the type of service ("service portability").wikipedia
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Telephone numbering plan

Area codeCalling codearea codes
Canada, South Africa and the United States are the only countries that offer full number portability transfers between both fixed lines and mobile phone lines, because mobile and fixed line numbers are mixed in the same area codes, and are billed identically for the calling party, the mobile user usually pays for incoming calls and texts; in other countries all mobile numbers are placed in higher priced mobile-dedicated area codes and the originator of the call to the mobile phone pays for the call. Though it was introduced as a tool to promote competition in the heavily monopolized wireline telecommunications industry, number portability became popular with the advent of mobile telephones, since in most countries different mobile operators are provided with different area codes and, without portability, changing one's operator would require changing one's number.
The strict correlation of a telephone to a geographical area has been broken by technical advances, such as local number portability and Voice over IP service.

Signalling System No. 7

SS7SS7 NetworkCCS7
Providers use SS7 to route calls throughout the US/Canada network.
It also performs number translation, local number portability, prepaid billing, Short Message Service (SMS), and other mass market services.

Telephone number

phone numbertelephone numbersphone numbers
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 change the type of service ("service portability").
Local number portability (LNP) allows a subscriber to request moving an existing telephone number to another telephone service provider.

Location Routing Number

The routing information necessary to complete these calls is known as a Location Routing Number (LRN).
The assignment of a location routing number to telephone numbers allows for local number portability.

Local exchange carrier

Local Exchange NetworkLEClocal
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 change the type of service ("service portability").
Number portability – The duty to provide, to the extent technically feasible, number portability in accordance with requirements prescribed by the Commission.

Mobile number portability

number portabilitycarry their original phone number with a new providerMNP
In the rest of the world it is referred to as mobile number portability (MNP). The same is not true of mobile telephones, which are fully portable to another carrier or another service type (such as landline or voice over IP) within the same local interconnection region.
Local number portability

Number Portability Administration Center

LNP was first implemented in the U.S. upon the establishment of the original Number Portability Administration Center (NPAC) in Chicago, Illinois in 1998.
As such, it facilitates local number portability in the United States and Canada.

North American Numbering Plan

Area codeArea codesArea code(s)
(The regulations are currently located at, et seq.) The North American Numbering Council (NANC) was directed to select the Local Number Portability Administrators (LNPAs), akin to the North American Numbering Plan Administrator (NANPA) which administers the North American Numbering Plan.
Number pooling was implemented with another technical obstacle, local number portability.

Voice over IP

VoIPvoice over Internet Protocolvoice-over-IP
The same is not true of mobile telephones, which are fully portable to another carrier or another service type (such as landline or voice over IP) within the same local interconnection region.
Local number portability (LNP) and mobile number portability (MNP) also impact VoIP business.

Local access and transport area

LATALATA codeLATAs
The same is not true of mobile telephones, which are fully portable to another carrier or another service type (such as landline or voice over IP) within the same local interconnection region.
Canada does define local interconnection regions (LIR's), which determine where points of interconnection (POI) must be provided by competing local exchange and mobile carriers to provide local number portability.

Area code 600

600610622
Numbers in the rarely used non-geographic area code 600 are not portable.
Each block of 10000 numbers is assigned to one carrier only; there is no number portability or number pooling in +1-600.

Local-loop unbundling

local loop unbundlingLLUunbundled
The sole of them operating statewide—Telefónica—is obliged to provide other firms with access to their exchange facilities or rental/transfer of their copper last-mile loops, at fees regulated by the CMT (practice known as local loop unbundling).
Local number portability

Landline

fixed linefixed-lineland line
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 change the type of service ("service portability"). Though it was introduced as a tool to promote competition in the heavily monopolized wireline telecommunications industry, number portability became popular with the advent of mobile telephones, since in most countries different mobile operators are provided with different area codes and, without portability, changing one's operator would require changing one's number.

Calling party pays

caller-pays cellularpays for the call
Canada, South Africa and the United States are the only countries that offer full number portability transfers between both fixed lines and mobile phone lines, because mobile and fixed line numbers are mixed in the same area codes, and are billed identically for the calling party, the mobile user usually pays for incoming calls and texts; in other countries all mobile numbers are placed in higher priced mobile-dedicated area codes and the originator of the call to the mobile phone pays for the call.

Vendor lock-in

lock-inproprietarylocked into
Some operators, especially incumbent operators with large existing subscriber bases, have argued against portability on the grounds that providing this service incurs considerable overhead, while others argue that it prevents vendor lock-in and allows them to compete fairly on price and service.

Federal Communications Commission

FCCFederal Communications Commission (FCC)Federal Communication Commission
In the US, LNP was mandated by the Federal Communications Commission (FCC) in 1996.

Competitive local exchange carrier

CLECcompeting carrierCompetitive Local Exchange Carriers
It was also a major point made by CLECs (competitive local exchange carriers) preventing customers from leaving ILECs (incumbent local exchange carriers), thus hindering competition.

Incumbent local exchange carrier

incumbentILECwireline incumbent
It was also a major point made by CLECs (competitive local exchange carriers) preventing customers from leaving ILECs (incumbent local exchange carriers), thus hindering competition.

Mandate

mandatorymandatesmandatorily
In the US, the FCC has mandated this in order to increase competition among providers.

Wireless

wireless communicationwireless communicationswireless internet
As of late November 2003, LNP was required for all landline and wireless common carriers, so long as the number is being ported to the same geographical area or telephone exchange.

Common carrier

carriercommon carrierscommon-carrier
As of late November 2003, LNP was required for all landline and wireless common carriers, so long as the number is being ported to the same geographical area or telephone exchange.

Geography

geographicalgeographicgeographer
As of late November 2003, LNP was required for all landline and wireless common carriers, so long as the number is being ported to the same geographical area or telephone exchange.

Telephone exchange

exchangescentral officeexchange
As of late November 2003, LNP was required for all landline and wireless common carriers, so long as the number is being ported to the same geographical area or telephone exchange.

Centralized database

centralized data managementcentralized database system
The operator that originates the call always check a centralized database and obtains the route to the call.

Mobile phone

cell phonemobilemobile phones
The same is not true of mobile telephones, which are fully portable to another carrier or another service type (such as landline or voice over IP) within the same local interconnection region. Though it was introduced as a tool to promote competition in the heavily monopolized wireline telecommunications industry, number portability became popular with the advent of mobile telephones, since in most countries different mobile operators are provided with different area codes and, without portability, changing one's operator would require changing one's number.