Central Office Code (NXX) assignments and Local Exchange Routing Guide(LERG) Updates
Types of Changes:
Changes to Central Office Code (NXX) Assignments in Bell Atlantic are contained in the local exchange routing guide(LERG). The LERG can be obtained from Bellcore. To order contact:
Dates changes are to occur:
Traffic Routing Administration
6 Corporate Place
Piscataway, NJ 08854-4157
The planned dates for changes to Central Office Code (NXX) assignments are contained in the LERG. The LERG is published periodically and reflects those changes scheduled to take place within the next six months
Location changes are to occur:
Changes that impact Central Office Codes (NXX) occur throughout Bell Atlantic. All changes are reflected in the LERG.
Reasonably foreseeable impact of change:
Changes in Central Office Codes (NXX) effect call routing. Interconnectors will need to reprogram their equipment for routing changes.
Wayne Milby Manager - Code Administration
4N-04, 1 E. Pratt Street
Baltimore, MD. 21202