Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 508 [Rate centres in NPA 508] [Dial plan for NPA 508]

NXX: 242

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-242 A Medfield MA MEFDMAPLDS0  9102 VERIZON NEW ENGLAND INC. 128      
508-242 0 Medfield MA   9102 VERIZON NEW ENGLAND INC. 128      
508-242 1 Medfield MA   892D ONVOY, LLC - MA 128   2019-05-11   
508-242 2 Medfield MA   515J IP HORIZON LLC 128   2015-10-18   
508-242 3 Medfield MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-05   
508-242 5 Medfield MA   318J COMCAST IP PHONE, LLC 128   2005-01-20   
508-242 6 Medfield MA   829J PAETEC ITEL, LLC 128   2005-08-06   
508-242 7 Medfield MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2007-03-05   
508-242 8 Medfield MA   9102 VERIZON NEW ENGLAND INC. 128      
508-242 9 Medfield MA   9102 VERIZON NEW ENGLAND INC. 128      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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