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

Block: A

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-200 A Woodlawn MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-201 A Westminster MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-202 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-203 A West River MD MAYOMDMYRS1  9212 VERIZON MARYLAND, INC. 238      
443-204 A Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-205 A Cambridge MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-206 A Perryville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-207 A Elkton MD BLTMMDCH40Z  6626 OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 238      
443-208 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-209 A Havre de Grace MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-210 A Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-212 A Sparks-Glencoe MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-213 A Pikesville MD OWMLMDOMDS0  9212 VERIZON MARYLAND, INC. 238      
443-214 A Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-215 A Chestertown MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242      
443-216 A Dundalk MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-217 A Annapolis MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-218 A Worthington MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 A Parkville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-220 A Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238      
443-221 A Annapolis MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-222 A Worthington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-223 A Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-224 A Baltimore MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-225 A Cambridge MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-226 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-227 A Port Deposit MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-228 A Chase MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-229 A Severna Park MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-230 A Odenton MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-231 A Essex MD BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-232 A Willards MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242      
443-233 A Vienna MD   829J PAETEC ITEL, LLC 242   2025-04-01   
443-234 A Snow Hill MD   829J PAETEC ITEL, LLC 242   2025-04-01   
443-235 A Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-236 A Cardiff MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-237 A North Beach MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-238 A Parkton MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-239 A Easton MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-240 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-241 A Westminster MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-242 A Sparrows Point MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-243 A Fallston MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-244 A Westminster MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-245 A Elkton MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-246 A Elkton MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-247 A Union Bridge MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-248 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-249 A Stevensville MD RMCKMDRRRS0  9212 VERIZON MARYLAND, INC. 242      
443-250 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-251 A Catonsville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-252 A Perryville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-253 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-254 A Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-255 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-256 A North East MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-257 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-258 A Easton MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-259 A Columbia MD CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-260 A Salisbury MD SLBRMDSBDS1  9212 VERIZON MARYLAND, INC. 242      
443-261 A Severna Park MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-262 A Centreville MD CNVLMDCTRS2  9212 VERIZON MARYLAND, INC. 242      
443-263 A Baltimore MD BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238      
443-264 A Pikesville MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-265 A Fork MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-266 A Glenwood MD   071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-267 A Darlington MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-268 A Baltimore MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-269 A Towson MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-270 A Glen Burnie MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-271 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-272 A Randallstown MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-273 A Reisterstown MD CLMAMDNIDS1  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-274 A Severn MD ODTNMDPORS2  9212 VERIZON MARYLAND, INC. 238      
443-275 A Towson MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-276 A Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-277 A Sykesville MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-278 A Baltimore MD BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238      
443-279 A Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-280 A Sykesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-281 A Cockeysville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-282 A Chestertown MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-283 A Columbia MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-284 A Waterloo MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-285 A Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
443-286 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-287 A Baltimore MD BLTMMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
443-288 A Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-289 A Westminster MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-290 A Parkville MD BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-291 A Hampstead MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-292 A Crofton MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-293 A Westminster MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-294 A West River MD   071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-295 A Prince Frederick MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-296 A Waterloo MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-297 A Arbutus MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-298 A Easton MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-299 A Fallston MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-300 A Sykesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      

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Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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