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.

Pomona, CA

<< 1 2 3 4 5 6 7 8 9 10 11 12 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
840-264 0 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
840-264 1 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
840-264 2 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
840-264 3 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
840-264 4 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
840-264 5 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
840-264 6 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
840-264 7 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
840-264 8 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
840-264 9 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
840-267 A   6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-267 0 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-01-12   
840-267 1 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-01-12   
840-267 2 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-01-12   
840-267 3 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-01-12   
840-267 4 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-01-12   
840-267 5 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-01-12   
840-267 6 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-01-12   
840-267 7 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-01-12   
840-267 8 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-01-12   
840-267 9   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-11-01   
840-275 A   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-02   
840-275 0   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-02   
840-275 1   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-02   
840-275 3   490J BOOST SUBSCRIBERCO L.L.C. 730   2025-08-09   
840-275 4   490J BOOST SUBSCRIBERCO L.L.C. 730   2025-08-09   
840-275 5   490J BOOST SUBSCRIBERCO L.L.C. 730   2025-11-06   
840-275 7   490J BOOST SUBSCRIBERCO L.L.C. 730   2026-01-05   
840-333 A LSANCAJWIMD  965H FRACTEL, LLC 730      
840-333 0 COVNCAXFX3Y  649C ONVOY, LLC - CA 730   2021-07-30   
840-333 1 COVNCAXFX3Y  649C ONVOY, LLC - CA 730   2021-07-30   
840-333 2 COVNCAXFX3Y  649C ONVOY, LLC - CA 730   2021-07-30   
840-333 3 LSANCAJWIMD  965H FRACTEL, LLC 730   2021-02-25   
840-333 4 LSANCAJWIMD  965H FRACTEL, LLC 730   2021-02-25   
840-333 5 COVNCAXFX3Y  649C ONVOY, LLC - CA 730   2021-07-30   
840-333 6 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-09-30   
840-333 7 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-07-30   
840-333 8 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-07-30   
840-333 9 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-07-30   
840-345 A LSANCAJWIMD  965H FRACTEL, LLC 730      
840-345 0 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-09-30   
840-345 1 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-09-30   
840-345 2 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-09-30   
840-345 3 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-09-30   
840-345 4 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-09-30   
840-345 5 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-09-30   
840-345 6 LSANCAJWIMD  965H FRACTEL, LLC 730   2021-09-06   
840-345 7 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-09-30   
840-345 8 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-09-30   
840-345 9 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-09-30   

<< 1 2 3 4 5 6 7 8 9 10 11 12 >>

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.