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: 721

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-721 A Auburn MA AUBNMALGDS0  9102 VERIZON NEW ENGLAND INC. 128      
508-721 0 Auburn MA AUBNMALGDS0  9102 VERIZON NEW ENGLAND INC. 128      
508-721 1 Auburn MA AUBNMALGDS0  9102 VERIZON NEW ENGLAND INC. 128      
508-721 2 Auburn MA AUBNMALGDS0  9102 VERIZON NEW ENGLAND INC. 128      
508-721 3 Auburn MA AUBNMALGDS0  9102 VERIZON NEW ENGLAND INC. 128      
508-721 4 Auburn MA AUBNMALGDS0  9102 VERIZON NEW ENGLAND INC. 128      
508-721 6 Auburn MA CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2002-11-11   
508-721 7 Auburn MA AUBNMALGDS0  9102 VERIZON NEW ENGLAND INC. 128      
508-721 8 Auburn MA AUBNMALGDS0  9102 VERIZON NEW ENGLAND INC. 128      
508-721 9 Auburn MA AUBNMALGDS0  9102 VERIZON NEW ENGLAND INC. 128      

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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