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
831-881 1 SLNSCA01XUY  252F WIDE VOICE, LLC - CA 736   2025-12-26   
831-881 2 SLNSCA01XUY  252F WIDE VOICE, LLC - CA 736   2025-12-26   
831-881 6 MTRYCAPM8MD  321J HD CARRIER LLC 736   2026-06-19   
831-881 7 MTRYCAPM8MD  321J HD CARRIER LLC 736   2026-06-19   
831-881 8 MTRYCAPM8MD  321J HD CARRIER LLC 736   2026-06-19   
831-881 9   649C ONVOY, LLC - CA 736   2026-08-21   
831-883 A MARNCA11DS0  9740 PACIFIC BELL 736      
831-883 0 MARNCA11DS0  9740 PACIFIC BELL 736      
831-883 1 MARNCA11DS0  9740 PACIFIC BELL 736      
831-883 2 MARNCA11DS0  9740 PACIFIC BELL 736      
831-883 3 MARNCA11DS0  9740 PACIFIC BELL 736      
831-883 4 MARNCA11DS0  9740 PACIFIC BELL 736      
831-883 5 MARNCA11DS0  9740 PACIFIC BELL 736      
831-883 6   145J TERRA NOVA TELECOM INC. 736   2022-11-03   
831-883 7 SLNSCA01XCY  624H ONVOY SPECTRUM, LLC 736   2024-05-22   
831-883 8 MARNCA11DS0  9740 PACIFIC BELL 736      
831-883 9 MARNCA11DS0  9740 PACIFIC BELL 736      
831-884 A MARNCA11DS0  9740 PACIFIC BELL 736      
831-884 0 MARNCA11DS0  9740 PACIFIC BELL 736      
831-884 1 MARNCA11DS0  9740 PACIFIC BELL 736      
831-884 2 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2021-03-31   
831-884 3 SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2014-02-04   
831-884 4 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2021-03-31   
831-884 5 SLNSCA01XHY  394L COMCAST PHONE OF CALIFORNIA, LLC 736   2013-01-18   
831-884 6 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2014-08-11   
831-884 7 SLNSCA01XCY  624H ONVOY SPECTRUM, LLC 736   2024-05-22   
831-884 8 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2015-10-09   
831-884 9 MARNCA11DS0  9740 PACIFIC BELL 736      
831-886 A SLNTCAPS4MD  732J NUSO, LLC 736      
831-886 0 SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-886 1 SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-886 2 SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-886 3 SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-886 4 SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-886 5 SLNTCAPS4MD  732J NUSO, LLC 736   2023-02-19   
831-886 6 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2024-12-02   
831-886 7 SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-886 8 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2024-12-02   
831-886 9 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2024-12-02   
831-887 A MTRYCAPM5MD  145J TERRA NOVA TELECOM INC. 736      
831-887 0 MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736      
831-887 1 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2024-12-02   
831-887 2 SLNSCA01XGX  9262 UTILITY TELECOM GROUP, LLC - CA 736      
831-887 3 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2024-12-02   
831-887 4 MTRYCA012MD  981E BANDWIDTH.COM CLEC, LLC - CA 736   2026-06-06   
831-887 5 SLNSCABIXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 736   2024-11-11   
831-887 6 SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2023-10-29   
831-887 7   145J TERRA NOVA TELECOM INC. 736   2019-05-21   
831-887 8 SLNSCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 736   2017-09-01   
831-899 A SESDCA11DS0  9740 PACIFIC BELL 736      

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

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.