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: 904 [Rate centres in NPA 904] [Dial plan for NPA 904]

NXX: 587

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
904-587 A St Johns FL JCVLFLCL4MD  937C ONVOY, LLC - FL 45204      
904-587 0 St Johns FL JCVLFLCL4MD  937C ONVOY, LLC - FL 45204   2019-05-19   
904-587 1 St Johns FL JCVLFLCL4MD  937C ONVOY, LLC - FL 45204   2018-12-06   
904-587 2 St Johns FL JCVLFLCL4MD  937C ONVOY, LLC - FL 45204   2018-12-06   
904-587 3 St Johns FL JCVLFLCL88Z  197D VONAGE AMERICA LLC 45204   2018-12-22   
904-587 4 St Johns FL JCVLFLCL4MD  937C ONVOY, LLC - FL 45204   2018-07-09   
904-587 5 St Johns FL JCVLFLCL88Z  197D VONAGE AMERICA LLC 45204   2018-12-22   
904-587 6 St Johns FL JCVLFLCL88Z  197D VONAGE AMERICA LLC 45204   2018-12-22   
904-587 7 St Johns FL JCVLFLCLYRX  829J PAETEC ITEL, LLC 45204   2018-07-27   
904-587 8 St Johns FL JCVLFLCL88Z  197D VONAGE AMERICA LLC 45204   2018-12-22   
904-587 9 St Johns FL JCVLFLCL80Z  7472 POWERTEL JACKSONVILLE LICENSES, INC. 45204   2018-09-15   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.