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: 210 [Rate centres in NPA 210] [Dial plan for NPA 210]

NXX: 750

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
210-750 A San Antonio TX SNANTXDIRMD  903C ONVOY, LLC - TX 566      
210-750 0 San Antonio TX SNANTX91X7Y  5562 METROPCS, INC. 566   2018-10-21   
210-750 1 San Antonio TX SNANTXDIX6X  073H TELNYX LLC 566   2021-11-01   
210-750 2 San Antonio TX SNANTX91X7Y  5562 METROPCS, INC. 566   2018-10-21   
210-750 3 San Antonio TX SNANTXDIRMD  903C ONVOY, LLC - TX 566   2018-12-09   
210-750 4 San Antonio TX SNANTXDIRMD  903C ONVOY, LLC - TX 566   2019-10-14   
210-750 5 San Antonio TX SNANTX91X7Y  5562 METROPCS, INC. 566   2018-10-21   
210-750 6 San Antonio TX SNANTXDIRMD  903C ONVOY, LLC - TX 566   2019-10-14   
210-750 7 San Antonio TX SNANTX91X7Y  5562 METROPCS, INC. 566   2018-10-21   
210-750 8 San Antonio TX SNAQTXKY7MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 566   2018-11-24   
210-750 9 San Antonio TX   793K TWC IP ENABLED SERVICES, LLC 566   2019-09-30   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.