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: 850 [Rate centres in NPA 850] [Dial plan for NPA 850]

NXX: 403

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
850-403 A Youngstown-Fountain FL PNCYFLMARMD  4802 LEVEL 3 COMMUNICATIONS, LLC - FL 45009      
850-403 0 Youngstown-Fountain FL PNCYFLMARMD  4802 LEVEL 3 COMMUNICATIONS, LLC - FL 45009      
850-403 1 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009      
850-403 2 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009      
850-403 3 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009      
850-403 4 Youngstown-Fountain FL PNCYFLMARMD  4802 LEVEL 3 COMMUNICATIONS, LLC - FL 45009      
850-403 5 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009      
850-403 6 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009      
850-403 7 Youngstown-Fountain FL PNCYFLMAXTZ  508J CENTURYLINK COMMUNICATIONS, LLC 45009      
850-403 8 Youngstown-Fountain FL PNCYFLMAXAZ  919F MCC TELEPHONY OF FLORIDA, LLC - FL 45009      
850-403 9 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.