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: 606 [Rate centres in NPA 606] [Dial plan for NPA 606]

NXX: 255

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
606-255 A Grayson KY WNCHKYMAXPY  365C POWERTEL KENTUCKY LICENSES, INC. 466      
606-255 0 Grayson KY   5562 METROPCS, INC. 466      
606-255 1 Grayson KY   365C POWERTEL KENTUCKY LICENSES, INC. 466   2005-03-27   
606-255 2 Grayson KY   5562 METROPCS, INC. 466   2021-02-15   
606-255 3 Grayson KY   365C POWERTEL KENTUCKY LICENSES, INC. 466   2022-06-21   
606-255 4 Grayson KY   365C POWERTEL KENTUCKY LICENSES, INC. 466   2022-06-21   
606-255 5 Grayson KY   419C ARMSTRONG TELECOMMUNICATIONS, INC. - KY 466   2007-10-29   
606-255 6 Grayson KY   365C POWERTEL KENTUCKY LICENSES, INC. 466      
606-255 7 Grayson KY   365C POWERTEL KENTUCKY LICENSES, INC. 466      
606-255 8 Grayson KY   073H TELNYX LLC 466   2020-07-05   
606-255 9 Grayson KY   365C POWERTEL KENTUCKY LICENSES, INC. 466   2022-06-21   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.