Mergers and/or Acquisitions Document - ATIS

LOCAL NUMBER PORTABILITY (LNP)
The following areas need to be addressed by companies participating in Local Number Portability who are in the
process of a merger/acquisition.
NUMBER PORTABILITY ADMINISTRATION CENTER (NPAC)
LOCATION ROUTING NUMBER (LRN)
With mergers and acquisitions, switch utilization and requirements are traditionally reviewed between the
companies to determine which facilities are required and which can be retired. In this process, consideration should
be given to ported numbers, which may currently reside on any of these switches. In eliminating switching facilities
with ported numbers, it will be necessary to not only move these numbers to the new switch, but to also update the
NPAC to reflect any modifications to the ported number/LRN association.
Thousands-Block Pooling utilizes LNP technology. For service providers assigned thousands-blocks for which
their company is not the LERG-assignee of that NPA-NXX, that thousands-block requires activation in the NPAC
for LRN routing. For mergers and acquisitions, review of the thousands-block assignments and the proper LRNs is
recommended. In the case of switch retirements in the Merger/Acquisitions process LRNs may change, affecting
LRN assignments in the NPAC for each thousands-block.
Location Routing Number is a 10-digit telephone number used to identify an LNP-capable switch. Calls to numbers
ported or pooled to that switch are routed based on that switch’s LRN. The first 6 digits of the LRN (NPA-NXX)
for a switch must be derived from an NPA-NXX code that is assigned to that switch. For calls to ported or pooled
numbers, post-query call routing is based on the NPA-NXX of the LRN rather than the NPA-NXX of the telephone
number. The last 4 digits of the LRN may be any combination of the LERG-assignee/Code Holder’s choosing. In
order to prevent potential trouble conditions, it is recommended that the Code Holder avoid any number which may
already be assigned to an active customer or any test function at the company.
POINT CODES
Point Codes are important to the Merger & Acquisition LNP process as they exist in the number records in the
NPAC. Any merger and/or acquisition could affect SS7 routing and Point Codes should be considered. For further
information, please see the SS7 Message Relay Services section in this document.
October 2009 NIIF Mergers and Acquisitions Document Page 21