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: 561 [Rate centres in NPA 561] [Dial plan for NPA 561]

NXX: 621

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
561-621 A West Palm Beach FL MIAMFLGR86Z  624H ONVOY SPECTRUM, LLC 46018      
561-621 0 West Palm Beach FL MIASFL680MD  982E BANDWIDTH.COM CLEC, LLC - FL 46018   2020-07-18   
561-621 1 West Palm Beach FL MIAMFL98DS4  937C ONVOY, LLC - FL 46018   2020-07-06   
561-621 2 West Palm Beach FL MIAMFL98DS4  937C ONVOY, LLC - FL 46018   2020-07-06   
561-621 3 West Palm Beach FL MIAMFL98DS4  937C ONVOY, LLC - FL 46018   2020-07-06   
561-621 4 West Palm Beach FL MIAMFL98DS4  937C ONVOY, LLC - FL 46018   2020-07-06   
561-621 5 West Palm Beach FL MIAMFL98DS4  937C ONVOY, LLC - FL 46018   2020-07-06   
561-621 6 West Palm Beach FL MIAMFLGR86Z  624H ONVOY SPECTRUM, LLC 46018   2020-07-02   
561-621 7 West Palm Beach FL MIASFL680MD  982E BANDWIDTH.COM CLEC, LLC - FL 46018   2020-07-18   
561-621 8 West Palm Beach FL MIASFL680MD  982E BANDWIDTH.COM CLEC, LLC - FL 46018   2020-07-18   
561-621 9 West Palm Beach FL MIASFL680MD  982E BANDWIDTH.COM CLEC, LLC - FL 46018   2020-07-18   

Last updated: Sun, 28 Feb 2021 19:06:05 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.