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: 740 [Rate centres in NPA 740] [Dial plan for NPA 740]

NXX: 537

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-537 A Toronto OH TOROOH53RS1  9321 OHIO BELL TEL CO 324      
740-537 0 Toronto OH CLMBOH11XLZ  001F BANDWIDTH.COM CLEC, LLC - OH 324   2009-01-05   
740-537 1 Toronto OH TOROOH53RS1  9321 OHIO BELL TEL CO 324      
740-537 2 Toronto OH TOROOH53RS1  9321 OHIO BELL TEL CO 324      
740-537 3 Toronto OH TOROOH53RS1  9321 OHIO BELL TEL CO 324      
740-537 4 Toronto OH TOROOH53RS1  9321 OHIO BELL TEL CO 324      
740-537 5 Toronto OH TOROOH53RS1  9321 OHIO BELL TEL CO 324      
740-537 6 Toronto OH TOROOH53RS1  9321 OHIO BELL TEL CO 324      
740-537 7 Toronto OH CLMBOH1125Z  508J CENTURYLINK COMMUNICATIONS, LLC 324   2014-07-07   
740-537 8 Toronto OH CLMBOH11XJZ  516C AT&T CORP. 324   2011-10-05   
740-537 9 Toronto OH TOROOH53RS1  9321 OHIO BELL TEL CO 324      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.