Date: June 30, 1998
From: R. C. Breidenbaugh - NANP Administration 202-756-5779; e-mail: firstname.lastname@example.org
Subject: NANP - Phased three-way split of 619 (California) Numbering Plan Area (NPA) with 858 & 935 NPAs
We have been advised by California-Nevada Code Administration (CNCA) that substantial telephone number growth in southern California necessitates providing area code relief for the 619 NPA. The relief plan approved by the California Public Utilities Commission (CPUC) in Decision 98-06-018 dated June 4, 1998, calls [for] a phased three-way split of the existing 619 NPA. Phase I will introduce the new 858 area code in the northern portion of the 619 on June 12, 1999. Phase 2 will introduce the new 935 area code in the eastern portion of the 619 on June 10, 2000.
The new 858 NPA will be bounded by the future 935 NPA in the east, the 760 NPA to the north, the 619 NPA to the south and the Pacific Ocean to the west. The new 935 NPA will be bounded by 760 NPA in the north and east, the 858, 619 and Pacific Ocean to the west. The attached map [not included in this html version] illustrates the 858, 935, and 619 NPA configurations after the completion of the three-way split.
Phase 1 of the three-way split of the 619 NPA, and the beginning of a permissive dialing period, will take place at 2:00 AM PDT on Saturday, June 12, 1999. The permissive dialing period will end at 2:00 AM PST on Saturday, December 11, 1999. During the permissive dialing period for phase 1, either the 619 or the 858 NPA will be acceptable in a dialed number terminating in the new 858 NPA. [Preceding sentence duplicated in official version].
Phase 2 of the three-way split of the 619 NPA, and the beginning of a permissive dialing period for phase 2, will take place at 2:00 AM PDT on Saturday, June 10, 2000. The phase 2 permissive dialing period will end at 2:00 AM PST on Saturday, December 09, 2000. During the permissive dialing period for phase 2, either the 619 or the 935 NPA will be acceptable in a dialed number terminating in the new 935 NPA. [Preceding sentence duplicated in official version].
After the permissive dialing period for either phase 1 or phase 2, calls dialed with an incorrect NPA code, as defined in the NPA split information published in the Local Exchange Routing Guide (LERG) will be routed to intercept.
Attached are lists [not included in this html version] of NXXs and Rate Centers that will be associated with the 619 858 and 935 NPAs. These lists reflect assignments published in the LERG CD-ROM as of June 1, 1997. The lists are sorted two ways, numerically by NXX and alphabetically by rate center name.
Because NXX assignment is a dynamic process, any NPA-NXX list represents just a snapshot in time. For this reason, it is imperative that updated NXX information be obtained on an ongoing basis. The monthly LERG and the monthly NPA/NXX Activity Guide (NNAG) provide such data. LERG and NNAG are available by license contract from Bellcore's Traffic Routing Administration (TRA) group. Contact them by dialing the TRA Hotline at 972-699-6700.
All international and domestic carriers are asked to ensure that the new 858 NPA code has been activated throughout their networks prior to June 12, 1999. Test calls to verify routing to the new NPA code can be made by dialing 858-745-0858, effective May 12, 1999. Calls successfully completed to the test number will receive a recorded announcement. The test number will be disconnected November 12, 1999.
All international and domestic carriers are asked to ensure that the new 935 NPA code has been activated throughout their networks prior to June 10, 2000. Test calls to verify routing to the new NPA code can be made by dialing 858-745-0935, effective May 10, 2000. Calls successfully completed to the test number will receive a recorded announcement. The test number will be disconnected November 10, 2000.
The dialing plan for the 619, 858 and 935 NPAs will be on a mandatory 1+10 digit basis, namely:
The CNCA has indicated the 619 NPA remains in a jeopardy situation, as described in Bellcore Planning Letter PL-NANP-054, which was invoked in accorance with the Central Office Code (NXX) Assignment Guidelines (INC 95-0470-008). Because of increased demand for central office codes and the possibility of premature exhaust, the CNCA has applied special and extraordinary NPA-specific conservation measures per Section 8 of the guidelines on April 24, 1997 as described in the above Planning Letter.
General questions concerning the three-way split of the 619 NPA may be directed to the CNCA at 925-823-2880 and related code conservation measures may be directed to Lockheed Martin-NANPA CO Code Administration at 925-363-8701. Questions of a technical nature should be directed to the NPA project coordinator, Bill Dibble - Pacific Bell, at 619-886-3463.
Questions concerning the content of this letter may be directed to Rose Breidenbaugh at 202-756-5779.
Rose Breidenbaugh North American Numbering Plan Administration