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LRN DIpping Service

LRN/LNP Dipping Service For Proper Routing and Jurisdiction

DialTel provides an LRN Dipping Service for carriers and service providers. LRN Dips help carriers to properly route calls by finding the ownership of the phone number they are calling. This enables the carrier to determine proper jurisdiction and routing to properly rate and bill the call to the end user.


What is LRN? (Local Routing Number)

Within the United States, the LRN is a 10-digit phone number following the North American Numbering Plan (NANP). The LRN is stored within a database called a Service Control Point (SCP) which identifies a switching port for a local telephone exchange.

Using the LRN, when a phone number is dialed, the local telephone exchange queries or dips a routing database, usually the SCP, for the LRN associated with the subscriber. The LRN removes the need for the public telephone number to identify the Local Exchange Carrier.

If a subscriber changes to another telephone service provider, the current telephone number can be retained, and only the LRN needs to be changed. This effectively allows the end user to keep their phone number when changing service providers.


Why Carriers or Service Providers Need LRN Dipping Services

In 1996, the US Congress mandated a change in local telephone service that allows any carrier to enter a local market. The new regulation provides for Local Number Portability (LNP), which means that when a consumer’s phone service is moved from one service provider to another, the telephone number (TN) does not change.

Most carriers bill according to the LRN of the phone number you are calling. Since up to 50% of the country is now ported, a very large percentage of calls will be improperly routed and billed if you do not use an LRN Query Service.

Dialtel provides such a service at a very reasonable cost with high reliability and performance.



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