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.

Switch: DYTNOH22X2Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
513-217 A Middletown OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
513-360 A Monroe OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
513-428 A Trenton OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-247 A Miamisburg-West Carrollton OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-250 A Dayton OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-281 A Dayton OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-521 A Springfield OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-535 A Dayton OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-540 A Englewood OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-610 A Dayton OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-619 A Centerville (Montgomery) OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-665 A Vandalia OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-702 A Beavercreek OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-705 A Beavercreek OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-856 A Dayton OH 309B CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 328      
937-999 A Dayton OH 600F CBTS TECHNOLOGY SOLUTIONS LLC - OH 328      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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