Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington Zone 14 (Baltimore LATA), MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-509 A BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
240-509 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
240-509 1 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
240-509 2   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-509 3 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
240-509 4   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-509 5   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-509 6 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
240-509 7 BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238      
240-509 8 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
240-509 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
240-742 A BLTMMDCHXKX  478J NUSO, LLC 238      
240-742 0 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
240-742 1 BLTMMDCHXKX  478J NUSO, LLC 238      
240-742 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
240-742 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
240-742 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
240-742 5 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
240-742 6 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
240-742 8 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
240-742 9 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
240-842 A BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
240-842 0 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
240-842 1 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
240-842 2   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-842 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
240-842 4   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-842 5   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-842 6 CLMAMDJTBMD  2589 US LEC OF MARYLAND, INC. 238      
240-842 7   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-842 8 BLTMMDCHX7X  073H TELNYX LLC 238      
240-842 9 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
240-865 A BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
240-865 0 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
240-865 1 BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
240-865 2   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-865 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
240-865 4 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
240-865 5 CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
240-865 6 BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238      
240-865 7 PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238      
240-865 8 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
240-865 9 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238      
301-205 A MAYOMDMYRS1  9212 VERIZON MARYLAND, INC. 238      
301-205 0 MAYOMDMYRS1  9212 VERIZON MARYLAND, INC. 238      
301-205 1 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-205 2 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-205 3 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-205 4 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-205 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
301-205 6 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-205 7 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-205 8   321J HD CARRIER LLC 238      
301-205 9 BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238      
301-261 A COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-261 0 COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-261 1 ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
301-261 2 ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
301-261 3 COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-261 4 MAYOMDMYRS1  9212 VERIZON MARYLAND, INC. 238      
301-261 5 GLVLMDGLRS1  9212 VERIZON MARYLAND, INC. 238      
301-261 6 COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-261 7 MAYOMDMYRS1  9212 VERIZON MARYLAND, INC. 238      
301-261 8 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-261 9 GLVLMDGLRS1  9212 VERIZON MARYLAND, INC. 238      
301-612 A BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
301-612 0 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-612 1   321J HD CARRIER LLC 238      
301-612 2 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-612 3   321J HD CARRIER LLC 238      
301-612 4 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-612 5 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-612 6 BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
301-612 7 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-612 8 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-612 9 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-621 A ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-621 0 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-621 1 EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
301-621 2 EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
301-621 3 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
301-621 4 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-621 5 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-621 6 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-621 7 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-621 8 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
301-621 9 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-629 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-629 0 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-629 1   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-629 2 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-629 3   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-629 4   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-629 5   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-629 6   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-629 7   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-629 8   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-629 9   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-858 A COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 0 COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      

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Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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