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.

Monterey, CA

<< 1 2 3 4 5 6 7 8 9 10 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
831-601 A SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736      
831-641 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-641 0 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-641 1 SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2023-07-24   
831-641 2 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2024-12-02   
831-641 3 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-641 4 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-641 5 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-641 6 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-641 7 SLNSCA01XHY  318J COMCAST IP PHONE, LLC 736   2017-07-25   
831-641 8   145J TERRA NOVA TELECOM INC. 736   2026-02-05   
831-641 9 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-642 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-643 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-643 0 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-643 1 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-643 2 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-643 3 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-643 4 SLNSCA01X5Y  516C AT&T CORP. 736   2016-07-21   
831-643 5 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2017-01-30   
831-643 6 SLNSCA01X1Y  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 736   2019-05-31   
831-643 7 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-643 8 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-643 9 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-644 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-645 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-646 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-647 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-648 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 0 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 1 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 2 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 3 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 4 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 5 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 6 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 7 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 8 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-649 9 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2024-12-02   
831-655 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-656 A MTRYCA01DS0  9740 PACIFIC BELL 736      
831-656 0 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-656 1 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-656 2 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-656 3 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-656 4 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-656 5 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-656 6 MTRYCA01DS0  9740 PACIFIC BELL 736      
831-656 7 MTRYCA01DS0  9740 PACIFIC BELL 736      

<< 1 2 3 4 5 6 7 8 9 10 >>

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.