The Telcordia LERG Routing Guide, commonly known as "The LERG," is a comprehensive data product produced monthly by the Telcordia Routing Administration(TRA) and primarily used by telecommunications service providers operating within the North American Numbering Plan . Its data supports the current local exchange network within the NANP and identifies reported planned changes in the network. The acronym "LERG" stands for "Local Exchange Routing Guide".

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  • The Telcordia LERG Routing Guide, commonly known as "The LERG," is a comprehensive data product produced monthly by the Telcordia Routing Administration(TRA) and primarily used by telecommunications service providers operating within the North American Numbering Plan . Its data supports the current local exchange network within the NANP and identifies reported planned changes in the network. The acronym "LERG" stands for "Local Exchange Routing Guide". The LERG Routing Guide provides data to support: Routing of calls by service providers over the Public Switched Telephone Network and interconnection points of the PSTN with the Internet Protocol world A wide range of business needs of companies that require information about the network, numbering and other data in the product The LERG Routing Guide includes: Operating Company Numbers, Company Names, Routing Contacts Country Code Assignments Numbering Plan Area Assignments Local access and transport area Codes By Region Destination Codes Access Tandem Codes Oddball NXXs Switching Entity Record detail, including PSTN and IP network elements Rate Center details and Localities Switch Homing Arrangements Operator Access Tandem Codes Location Routing Numbers (LRNs) (en)
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  • The Telcordia LERG Routing Guide, commonly known as "The LERG," is a comprehensive data product produced monthly by the Telcordia Routing Administration(TRA) and primarily used by telecommunications service providers operating within the North American Numbering Plan . Its data supports the current local exchange network within the NANP and identifies reported planned changes in the network. The acronym "LERG" stands for "Local Exchange Routing Guide". (en)
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  • Telcordia LERG Routing Guide (en)
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