Local Calling Guide

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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 753

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-753 A Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM OF MARYLAND, INC. 236      
443-753 0 Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM OF MARYLAND, INC. 236      
443-753 1 Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM OF MARYLAND, INC. 236      
443-753 2 Waterloo (Washington DC LATA) MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2014-06-12   
443-753 3 Waterloo (Washington DC LATA) MD ARTNVAARXDY  318J COMCAST IP PHONE LLC 236   2015-01-21   
443-753 4 Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM OF MARYLAND, INC. 236      
443-753 5 Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM OF MARYLAND, INC. 236      
443-753 6 Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM OF MARYLAND, INC. 236      
443-753 7 Waterloo (Washington DC LATA) MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2021-05-21   
443-753 8 Waterloo (Washington DC LATA) MD VINNVACB0MD  082H LOCAL ACCESS LLC - MD 236   2016-05-31   
443-753 9 Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM OF MARYLAND, INC. 236      

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

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