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: 813 [Rate centres in NPA 813] [Dial plan for NPA 813]

NXX: 491

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
813-491 A Tampa West FL TAMPFLXA3MD  829J PAETEC ITEL, LLC 952   2024-12-11   
813-491 0 Tampa West FL   829J PAETEC ITEL, LLC 952      
813-491 1 Tampa West FL   937C ONVOY, LLC - FL 952   2020-09-26   
813-491 2 Tampa West FL   829J PAETEC ITEL, LLC 952      
813-491 3 Tampa West FL   594D YMAX COMMUNICATIONS CORP. - FL 952   2009-03-10   
813-491 4 Tampa West FL   045L BHN IP ENABLED SERVICES, LLC 952   2016-07-24   
813-491 5 Tampa West FL   829J PAETEC ITEL, LLC 952      
813-491 6 Tampa West FL   829J PAETEC ITEL, LLC 952      
813-491 7 Tampa West FL   937C ONVOY, LLC - FL 952   2020-07-03   
813-491 8 Tampa West FL   937C ONVOY, LLC - FL 952   2020-07-03   
813-491 9 Tampa West FL   937C ONVOY, LLC - FL 952   2020-09-26   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.