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: 209 [Rate centres in NPA 209] [Dial plan for NPA 209]

NXX: 550

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
209-550 A Modesto CA MDSTCA02DS0  9740 PACIFIC BELL 738      
209-550 0 Modesto CA MDSTCA02DS0  9740 PACIFIC BELL 738      
209-550 1 Modesto CA SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738   2006-01-26   
209-550 2 Modesto CA MDSTCA02DS0  9740 PACIFIC BELL 738      
209-550 3 Modesto CA MDSTCA02DS0  9740 PACIFIC BELL 738      
209-550 4 Modesto CA MDSTCA02DS0  9740 PACIFIC BELL 738      
209-550 5 Modesto CA MDSTCA02DS0  9740 PACIFIC BELL 738      
209-550 6 Modesto CA SKTNCA01XPY  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2020-04-10   
209-550 7 Modesto CA MDSTCA02DS0  9740 PACIFIC BELL 738      
209-550 8 Modesto CA MDSTCA02DS0  9740 PACIFIC BELL 738      
209-550 9 Modesto CA SKTNCASLAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 738   2020-12-07   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.