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: 227

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-227 A Somerville MA CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-227 0 Somerville MA CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-227 1 Somerville MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2010-03-15   
857-227 2 Somerville MA CMBRMABEQMD  321J HD CARRIER LLC 128   2016-04-11   
857-227 3 Somerville MA   829J PAETEC ITEL, LLC 128   2016-03-09   
857-227 4 Somerville MA   829J PAETEC ITEL, LLC 128   2016-03-09   
857-227 5 Somerville MA   829J PAETEC ITEL, LLC 128   2016-03-09   
857-227 6 Somerville MA CMBRMABEQMD  321J HD CARRIER LLC 128   2016-04-11   
857-227 7 Somerville MA SOVLMAAB5MD  732H BARR TELL USA, INC. - MA 128   2015-12-31   
857-227 8 Somerville MA CMBRMABEQMD  321J HD CARRIER LLC 128   2016-04-11   
857-227 9 Somerville MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2020-11-09   

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

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