Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 857 [Rate centres in NPA 857] [Dial plan for NPA 857]

NXX: 373

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-373 A Belmont MA   829J PAETEC ITEL, LLC 128      
857-373 0 Belmont MA   829J PAETEC ITEL, LLC 128      
857-373 1 Belmont MA   829J PAETEC ITEL, LLC 128      
857-373 2 Belmont MA   829J PAETEC ITEL, LLC 128      
857-373 3 Belmont MA   829J PAETEC ITEL, LLC 128      
857-373 4 Belmont MA   829J PAETEC ITEL, LLC 128      
857-373 5 Belmont MA   829J PAETEC ITEL, LLC 128      
857-373 6 Belmont MA   829J PAETEC ITEL, LLC 128      
857-373 7 Belmont MA   145J TERRA NOVA TELECOM INC. 128   2022-05-13   
857-373 8 Belmont MA   515J IP HORIZON LLC 128   2015-03-27   
857-373 9 Belmont MA NRTNMAAACM4  5562 METROPCS, INC. 128   2003-01-14   

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

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