Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 288

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-288 A Berlin MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242      
667-288 0 Berlin MD   568G PEERLESS NETWORK OF MARYLAND, LLC 242   2020-10-30   
667-288 1 Berlin MD   318J COMCAST IP PHONE, LLC 242   2021-02-26   
667-288 2 Berlin MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2020-10-29   
667-288 3 Berlin MD   318J COMCAST IP PHONE, LLC 242   2021-02-26   
667-288 4 Berlin MD   876D ONVOY, LLC - MD 242   2022-10-16   
667-288 5 Berlin MD   624H ONVOY SPECTRUM, LLC 242   2021-05-27   
667-288 6 Berlin MD   876D ONVOY, LLC - MD 242   2021-03-05   
667-288 7 Berlin MD   876D ONVOY, LLC - MD 242   2021-03-05   
667-288 9 Berlin MD   568G PEERLESS NETWORK OF MARYLAND, LLC 242   2021-02-21   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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