Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Columbia, MD

1 2 3 4 5 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-290 A CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-290 0 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-290 1 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-290 2 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-290 3 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-290 4 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-290 5 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-290 6 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-290 7 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-290 8 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-290 9 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-309 A CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-312 A CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 0 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 1 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 2 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 3 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 4 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 5 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-312 6 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-312 7 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-312 8 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-312 9 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-381 A CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-423 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
410-447 A HNVAMDAE3MD  6630 USA MOBILITY WIRELESS, INC. 238      
410-531 A CLVLMDCERP0  9212 VERIZON MARYLAND, INC. 238   2024-01-30   
410-707 A BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
410-715 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-730 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-740 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-772 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-772 0 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-772 1 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-772 2 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-772 3 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-772 4 BLTMMDCHFMD  5562 METROPCS, INC. 238      
410-772 5 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-772 6 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-772 7 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-772 8 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-772 9 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-794 A BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 0 BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 1 BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 2 BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 3 BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 4 BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 5 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238      
410-794 6 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
410-794 7 BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 8 BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 9 BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-872 A CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-884 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-910 A BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-953 A CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-953 0 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-953 1 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-953 2 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-953 3 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-953 4 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-953 5 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-953 6 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-953 7 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-953 8 CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-953 9 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-964 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-992 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-992 0 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-992 1 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-992 2 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
410-992 3 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-992 4 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-992 5 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-992 6 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-992 7 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-992 8 ELCYMDELDS0  9212 VERIZON MARYLAND, INC. 238      
410-992 9 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-997 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
443-259 A CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 0 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 1 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 2 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 3 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 4 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 5 CLMAMDJTBMD  2589 US LEC OF MARYLAND, INC. 238      
443-259 6 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 7 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 8 CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 9 BLTMMDCHAMD  1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 238      
443-276 A BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 0 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 1 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 2 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 3 BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238      
443-276 4 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 5 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 6 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 7 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      

1 2 3 4 5 >>

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.