Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington Zone 2, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-222 8   829J PAETEC ITEL, LLC 236      
301-222 9   829J PAETEC ITEL, LLC 236      
301-224 A SLSPMDSSX6X  6630 USA MOBILITY WIRELESS, INC. 236      
301-227 A BTHSMDWADS0  9212 VERIZON MARYLAND, INC. 236      
301-229 A BTHSMDWADS0  9212 VERIZON MARYLAND, INC. 236      
301-243 A BTHSMDWADS0  9212 VERIZON MARYLAND, INC. 236      
301-243 0   9212 VERIZON MARYLAND, INC. 236   2006-08-19   
301-243 1   9212 VERIZON MARYLAND, INC. 236   2006-08-19   
301-243 2   9212 VERIZON MARYLAND, INC. 236   2006-08-19   
301-243 3   9212 VERIZON MARYLAND, INC. 236   2006-08-19   
301-243 4   9212 VERIZON MARYLAND, INC. 236   2006-08-19   
301-243 5   9212 VERIZON MARYLAND, INC. 236   2006-08-19   
301-243 6   9212 VERIZON MARYLAND, INC. 236   2006-08-19   
301-243 7   9212 VERIZON MARYLAND, INC. 236   2006-08-19   
301-243 8   9212 VERIZON MARYLAND, INC. 236   2006-08-19   
301-243 9   9212 VERIZON MARYLAND, INC. 236   2006-08-19   
301-263 A BTHSMDWADS0  9212 VERIZON MARYLAND, INC. 236      
301-263 0   9212 VERIZON MARYLAND, INC. 236      
301-263 1   9212 VERIZON MARYLAND, INC. 236      
301-263 2   9212 VERIZON MARYLAND, INC. 236      
301-263 3   876D ONVOY, LLC - MD 236   2016-02-14   
301-263 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-03-20   
301-263 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-06-08   
301-263 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2005-08-15   
301-263 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2005-08-15   
301-263 8   4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 236   2004-04-06   
301-263 9   9212 VERIZON MARYLAND, INC. 236      
301-269 A WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-269 0   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-05-29   
301-269 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-05-29   
301-269 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-05-29   
301-269 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-01-02   
301-269 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-03-15   
301-269 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-03-15   
301-269 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-03-15   
301-269 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-04-29   
301-269 8   829J PAETEC ITEL, LLC 236   2015-06-29   
301-269 9   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-10-22   
301-272 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 0   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2008-02-21   
301-272 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-12-01   
301-272 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-10-08   
301-272 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 7   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2008-02-21   
301-272 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 9   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-275 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      

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

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