Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 661 [Rate centres in NPA 661] [Dial plan for NPA 661]

NXX: 540

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-540 A Palmdale: Palmdale DA CA PLDLCA01DS0  9740 PACIFIC BELL 730      
661-540 0 Palmdale: Palmdale DA CA PLDLCA01DS0  9740 PACIFIC BELL 730      
661-540 1 Palmdale: Palmdale DA CA PLDLCA01DS0  9740 PACIFIC BELL 730      
661-540 2 Palmdale: Palmdale DA CA PLDLCA01DS0  9740 PACIFIC BELL 730      
661-540 3 Palmdale: Palmdale DA CA SIMICACNGT1  899D METROPCS NETWORKS, LLC 730      
661-540 4 Palmdale: Palmdale DA CA PLDLCA01DS0  9740 PACIFIC BELL 730      
661-540 5 Palmdale: Palmdale DA CA LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730      
661-540 6 Palmdale: Palmdale DA CA PLDLCA01DS0  9740 PACIFIC BELL 730      
661-540 7 Palmdale: Palmdale DA CA PLDLCA01DS0  9740 PACIFIC BELL 730      
661-540 8 Palmdale: Palmdale DA CA PLDLCA01DS0  9740 PACIFIC BELL 730      
661-540 9 Palmdale: Palmdale DA CA PLDLCA01DS0  9740 PACIFIC BELL 730      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.