Area Code | Prefix | City/Switch Name (Click for city search) | State/Prov. Area Map | Telephone Company Web link | Telco Type | More Info |
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667 | 200 | COLUMBIA | Maryland | NEUTRAL TANDEM-MARYLAND, LLC - MD | | More |
667 | 201 | BEL AIR | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 202 | ELKTON | Maryland | NEUTRAL TANDEM-MARYLAND, LLC - MD | | More |
667 | 203 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 205 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 206 | BALTIMORE | Maryland | METRO PCS, INC. | | More |
667 | 207 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 208 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 209 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 210 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 212 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 213 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 214 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 216 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 217 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 218 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 219 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 220 | COLUMBIA | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 221 | TOWSON | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 222 | ARGRGBSNIS | Maryland | NEUTRAL TANDEM-MARYLAND, LLC - MD | | More |
667 | 224 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 225 | BALTIMORE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
667 | 228 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
667 | 229 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
667 | 231 | BALTIMORE | Maryland | XO MARYLAND, LLC | CLEC | More |
667 | 233 | BALTIMORE | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
667 | 234 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 239 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 248 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
667 | 251 | TOWSON | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
667 | 253 | SALISBURY | Maryland | 365 WIRELESS, LLC | | More |
667 | 260 | BALTIMORE | Maryland | CITRIX COMMUNICATIONS LLC - MD | | More |
667 | 303 | BALTIMORE | Maryland | 365 WIRELESS, LLC | | More |
667 | 305 | PIKESVILLE | Maryland | 365 WIRELESS, LLC | | More |
667 | 307 | CROFTON | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
667 | 308 | TOWSON | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
667 | 309 | BALTIMORE | Maryland | LOCAL ACCESS LLC - MD | | More |
667 | 312 | BALTIMORE | Maryland | ATLANTECH ONLINE, INC. - MD | | More |
667 | 313 | COLUMBIA | Maryland | MCI WORLDCOM COMMUNICATIONS, INC. - MD | CLEC | More |
667 | 330 | SALISBURY | Maryland | US LEC OF MARYLAND, INC. | CLEC | More |
667 | 333 | ARGRGBSNIS | Maryland | BALTIMORE-WASHINGTON TELEPHONE BWT | CLEC | More |
667 | 367 | WESTMINSTR | Maryland | BALTIMORE-WASHINGTON TELEPHONE BWT | CLEC | More |
667 | 401 | BALTIMORE | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
667 | 444 | BALTIMORE | Maryland | NEUTRAL TANDEM-MARYLAND, LLC - MD | | More |
667 | 600 | BALTIMORE | Maryland | WORLDCALL INTERCONNECT INC. | | More |
667 | 677 | BALTIMORE | Maryland | BROADVOX-CLEC, LLC - MD | | More |
667 | 701 | ELKRIDGE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
667 | 770 | BALTIMORE | Maryland | AIRUS, INC. - MD | | More |
667 | 771 | BALTIMORE | Maryland | WIDE VOICE, LLC - MD | | More |
667 | 777 | SEVERNA PK | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
667 | 786 | COLUMBIA | Maryland | TELEPORT COMMUNICATIONS GROUP AMERICA, INC. - MD | CAP | More |
667 | 801 | BALTIMORE | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
667 | 802 | CATONSVL | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
667 | 803 | SOLOMONS | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
667 | 812 | WATERLO236 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
667 | 888 | BALTIMORE | Maryland | VOXBEAM TELECOMMUNICATIONS INC. - MD | | More |
667 | 930 | BALTIMORE | Maryland | RCLEC, INC. - MD | | More |
667 | 999 | ELKRIDGE | Maryland | NEUTRAL TANDEM-MARYLAND, LLC - MD | | More |
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