Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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   2006-05-06   
850-403 1 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009   2018-12-16   
850-403 2 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009   2018-12-16   
850-403 3 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009   2018-08-08   
850-403 4 Youngstown-Fountain FL PNCYFLMARMD  4802 LEVEL 3 COMMUNICATIONS, LLC - FL 45009   2004-12-20   
850-403 5 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009   2018-08-08   
850-403 6 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009   2019-11-09   
850-403 7 Youngstown-Fountain FL PNCYFLMAXTZ  508J CENTURYLINK COMMUNICATIONS, LLC 45009   2014-07-20   
850-403 8 Youngstown-Fountain FL PNCYFLMAXAZ  919F MCC TELEPHONY OF FLORIDA, LLC - FL 45009   2010-04-16   
850-403 9 Youngstown-Fountain FL PNCYFLMAX6Z  937C ONVOY, LLC - FL 45009   2018-08-31   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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