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LERG Routing Guide
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<p>The Local Exchange Routing Guide (LERG) is a database of telecommunications numbering resources for use in the administration and operation of the <a href="/facts/North_American_Numbering_Plan/0QQ8v3ph">North American Numbering Plan</a> (NANP) by the <a href="/facts/North_American_Numbering_Plan_Administrator/0QQ8v3ph">NANP administrator</a> (NANPA) and <a href="/facts/Telecommunications_service_provider/jrWc1YHE">telecommunications service providers</a>. This data supports the local exchange network of the NANP and identifies planning changes in the network. </p><p>The database has been maintained by private sector entities assigned by the <a href="/facts/Federal_Communications_Commission/Ueghz8W0">Federal Communications Commission</a> (FCC) to perform the NANPA function. </p><p>The database is produced in the <i>TruOps Telecom Routing Administration</i> (TRA) product group of <a href="/facts/Iconectiv/MBQAkk4J">iconectiv, LLC</a>, formerly named <a href="/facts/Telcordia/MBQAkk4J">Telcordia</a>, a division of <a href="/facts/Ericsson/yJ4oMMp7">Ericsson</a> since 2012. </p>