1 INC REPORT TO THE NANC March 2002 INC Recommended Plan for Expanding the Capacity of the NANP David Bench - INC Moderator

INC NANPE DOCUMENTS Interim NANP Expansion Report (INC , December 1999) Recommended Plan for Expanding The Capacity of the NANP (INC , December 2001) NANP Expansion Reference Document Still in DRAFT status All documents can be found at:

KEY ASSUMPTIONS Uniform (10-digit) dialing to be implemented prior to expansion The existing D Digit not be released prior to expansion Existing prefixes (e.g., 0, 1, 011, 101-XXXX) to remain prior to and after expansion

4 NANP EXPANSION RECOMMENDATION INC Recommended NANP Expansion Plan Format NXX(X) + (X)NXX + XXXX NXX(X) a four-digit NPA with (X) the additional digit (X)NXX a four-digit CO Code with (X) the additional digit XXXX a four-digit line number Here, the value N represents digits 2 through 9, and X represents digits 0 through 9 Note: The new F Digit (sixth digit of the expanded plan) takes on the values of 2 through 9 to allow a future expansion effort if and when needed.

5 NANP EXPANSION RECOMMENDATION Transition Method 1 (both digits implemented simultaneously) NXX(X) + (X) NXX + XXXX (INC recommends this approach) Transition Method 2 (phased approach with NPA implemented first) NXX (X) + NXX + XXXX NXX (X) + (X) NXX + XXXX Transition Method 3 (phased approach with CO Code implementation first) NXX + (0)NXX + XXXX NXX(1) + (X) NXX + XXXX