Area Code | Prefix | City/Switch Name (Click for city search) | State/Prov. Area Map | Telephone Company Web link | Telco Type | More Info |
|---|
| 201 | 621 | HACKENSACK | New Jersey | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 202 | 621 | WASHINGTON ZONE 1 | Virginia | BROADVIEW NETWORKS, INC. - DC | | More |
| 203 | 621 | DARIEN | Connecticut | PAETEC COMMUNICATIONS, LLC - CT | | More |
| 204 | 621 | DAUPHIN | Manitoba | MTS Inc. | | More |
| 205 | 621 | ALABASTER | Alabama | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | RBOC | More |
| 206 | 621 | SEATTLE | Washington | QWEST CORPORATION | RBOC | More |
| 207 | 621 | AUGUSTA | Maine | CONSOLIDATED COMM OF NO. NEW ENGLAND-ME | RBOC | More |
| 208 | 621 | LAPWAI | Idaho | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 209 | 621 | FRESNO | California | T-MOBILE USA, INC. | WIRELESS PROV | More |
| 210 | 621 | SANANTONIO | Texas | SOUTHWESTERN BELL | RBOC | More |
| 212 | 621 | NWYRCYZN01 | New York | VERIZON NEW YORK, INC. | RBOC | More |
| 213 | 621 | LSAN DA 01 | California | PACIFIC BELL | RBOC | More |
| 214 | 621 | GRANDPRARI | Texas | METROPCS, INC. | | More |
| 215 | 621 | PHLDLPHZN3 | Pennsylvania | VERIZON PENNSYLVANIA, INC. | RBOC | More |
| 216 | 621 | CLEVELAND | Ohio | OHIO BELL TEL CO | RBOC | More |
| 217 | 621 | CHAMPAURBN | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
| 218 | 621 | PALISADE | Minnesota | PAUL BUNYAN RURAL TELEPHONE COOP. | CLEC | More |
| 225 | 621 | GONZALES | Louisiana | EAST ASCENSION TELEPHONE COMPANY, LLC | IND. TELCO | More |
| 229 | 621 | AMERICUS | Georgia | POWERTEL ATLANTA LICENSES, INC. | WIRELESS PROV | More |
| 240 | 621 | WSNGTNZN11 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 248 | 621 | W BLOOMFLD | Michigan | 123.NET, INC. | CLEC | More |
| 250 | 621 | GREENVILLE | British Columbia | TELUS | IND. TELCO | More |
| 251 | 621 | MOBILE | Alabama | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | RBOC | More |
| 252 | 621 | GREENVILLE | North Carolina | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 256 | 621 | DECATUR | Alabama | NEW CINGULAR WIRELESS PCS, LLC - GA | WIRELESS PROV | More |
| 262 | 621 | LAKEGENEVA | Wisconsin | AMERICAN MESSAGING SERVICES, LLC | | More |
| 267 | 621 | DOYLESTOWN | Pennsylvania | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | WIRELESS PROV | More |
| 269 | 621 | HARTFORD | Michigan | FRONTIER NORTH, INC. - MI | IND. TELCO | More |
| 270 | 621 | MADISONVL | Kentucky | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY | WIRELESS PROV | More |
| 276 | 621 | CRIPPLECRK | Virginia | UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA | IND. TELCO | More |
| 281 | 621 | HOUSTON | Texas | USA MOBILITY WIRELESS, INC. | WIRELESS PROV | More |
| 289 | 621 | King City | Ontario | Fibernetics Corporation | | More |
| 301 | 621 | WSNG238Z14 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 302 | 621 | HOCKESSIN | Delaware | ONVOY, LLC - DE | | More |
| 303 | 621 | DENVER | Colorado | QWEST CORPORATION | RBOC | More |
| 304 | 621 | ELKINS | West Virginia | UNITED STATES CELLULAR - WV | WIRELESS PROV | More |
| 305 | 621 | NORTH DADE | Florida | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | RBOC | More |
| 306 | 621 | YORKTON | Saskatchewan | SaskTel Mobility | | More |
| 307 | 621 | BUFFALO | Wyoming | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | WIRELESS PROV | More |
| 309 | 621 | PEORIA | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
| 310 | 621 | CULVERCITY | California | T-MOBILE USA, INC. | WIRELESS PROV | More |
| 312 | 621 | CHICGOZN01 | Illinois | ILLINOIS BELL TEL CO | RBOC | More |
| 313 | 621 | DETROITZN6 | Michigan | MICHIGAN BELL TEL CO | RBOC | More |
| 314 | 621 | ST LOUIS | Missouri | SOUTHWESTERN BELL | RBOC | More |
| 315 | 621 | POTSDAM | New York | ONVOY, LLC- NY | | More |
| 316 | 621 | EL DORADO | Kansas | WINDSTREAM NUVOX KANSAS, LLC | CLEC | More |
| 317 | 621 | FISHERS | Indiana | INDIANA BELL TEL CO INC | RBOC | More |
| 318 | 621 | SHREVEPORT | Louisiana | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | RBOC | More |
| 319 | 621 | IOWA CITY | Iowa | T-MOBILE USA, INC. | WIRELESS PROV | More |
| 321 | 621 | TITUSVILLE | Florida | ONVOY, LLC - FL | | More |
| 323 | 621 | MONTEBELLO | California | T-MOBILE USA, INC. | WIRELESS PROV | More |
| 330 | 621 | WOOSTER | Ohio | T-MOBILE USA, INC. | WIRELESS PROV | More |
| 334 | 621 | CLAYTON | Alabama | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL | WIRELESS PROV | More |
| 336 | 621 | GREENSBORO | North Carolina | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | RBOC | More |
| 347 | 621 | NWYRCYZN04 | New York | CABLEVISION LIGHTPATH, INC. - NY | CLEC | More |
| 352 | 621 | HOMOSSSSPG | Florida | CENTURYLINK OF FLORIDA, INC. (UNITED) | IND. TELCO | More |
| 360 | 621 | SILVERDALE | Washington | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | | More |
| 361 | 621 | PETTUS | Texas | CENTRAL TEL. CO. OF TEXAS DBA CENTURYLINK | IND. TELCO | More |
| 385 | 621 | OGDEN | Utah | US WEST COMMUNICATIONS - MOUNTAIN BELL - UT | RBOC | More |
| 401 | 621 | PROVIDENCE | Rhode Island | VERIZON NEW ENGLAND INC. | RBOC | More |
| 402 | 621 | NELSON | Nebraska | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE | | More |
| 403 | 621 | Canmore | Alberta | Bell West Inc. | | More |
| 404 | 621 | ATLANTA | Georgia | POWERTEL ATLANTA LICENSES, INC. | WIRELESS PROV | More |
| 405 | 621 | BETHANY | Oklahoma | SOUTHWESTERN BELL | RBOC | More |
| 406 | 621 | FORTBENTON | Montana | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | WIRELESS PROV | More |
| 407 | 621 | WINTERPARK | Florida | CENTURYLINK OF FLORIDA, INC. (UNITED) | IND. TELCO | More |
| 408 | 621 | SARATOGA | California | NEW CINGULAR WIRELESS PCS, LLC | WIRELESS PROV | More |
| 409 | 621 | GALVESTON | Texas | SOUTHWESTERN BELL | RBOC | More |
| 410 | 621 | PRINCEANNE | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 412 | 621 | PTTSBGZON1 | Pennsylvania | VERIZON PENNSYLVANIA, INC. | RBOC | More |
| 414 | 621 | MILWAUKEE | Wisconsin | 2ND CENTURY COMMUNICATIONS, INC. - | | More |
| 415 | 621 | SNFC CNTRL | California | PACIFIC BELL | RBOC | More |
| 416 | 621 | TORONTO | Ontario | Bell Canada | IND. TELCO | More |
| 417 | 621 | JOPLIN | Missouri | SOUTHWESTERN BELL | RBOC | More |
| 418 | 621 | QUEBEC | Quebec | Bell Canada | IND. TELCO | More |
| 419 | 621 | SANDUSKY | Ohio | OHIO BELL TEL CO | RBOC | More |
| 423 | 621 | MORRISTOWN | Tennessee | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | WIRELESS PROV | More |
| 435 | 621 | VERNAL | Utah | T-MOBILE USA, INC. | WIRELESS PROV | More |
| 440 | 621 | BAINBRIDGE | Ohio | CEBRIDGE TELECOM OH, LLC DBA SUDDENLINK COMM | | More |
| 443 | 621 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 450 | 621 | ST THERESE | Quebec | Bell Canada | IND. TELCO | More |
| 469 | 621 | DALLAS | Texas | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | CAP | More |
| 470 | 621 | ATLANTA NE | Georgia | TELEPORT COMMUNICATIONS AMERICA, LLC - GA | CLEC | More |
| 478 | 621 | MACON | Georgia | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | RBOC | More |
| 479 | 621 | ROGERS | Arkansas | SOUTHWESTERN BELL | RBOC | More |
| 480 | 621 | PHOENIX | Arizona | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | CLEC | More |
| 484 | 621 | PHPHSBZN12 | Pennsylvania | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | CLEC | More |
| 501 | 621 | LITTLEROCK | Arkansas | TELNYX LLC | | More |
| 502 | 621 | LOUISVILLE | Kentucky | AMERICAN MESSAGING SERVICES, LLC | | More |
| 503 | 621 | PORTLAND | Oregon | QWEST CORPORATION | RBOC | More |
| 504 | 621 | KENNER | Louisiana | VOICESTREAM GSM I, LLC | | More |
| 505 | 621 | LAS CRUCES | New Mexico | ONVOY, LLC - NM | | More |
| 507 | 621 | ST JAMES | Minnesota | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | | More |
| 508 | 621 | WESTBORO | Massachusetts | TC SYSTEMS, INC. | CAP | More |
| 509 | 621 | NEWMANLAKE | Washington | COMCAST IP PHONE, LLC | | More |
| 510 | 621 | RICHMOND | California | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 512 | 621 | AUSTIN | Texas | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | WIRELESS PROV | More |
| 513 | 621 | CINCINNATI | Ohio | CINCINNATI BELL | IND. TELCO | More |
| 514 | 621 | ST GENEVIEVE | Quebec | Fido Solutions Inc. | | More |
| 516 | 621 | NASSAUZN04 | New York | VERIZON NEW YORK, INC. | RBOC | More |
| 517 | 621 | MUNITH | Michigan | TELNET WORLDWIDE, INC. | CLEC | More |
| 518 | 621 | TUPPER LAKE | New York | VERIZON NEW YORK, INC. | RBOC | More |
| 519 | 621 | GALT | Ontario | Bell Canada | IND. TELCO | More |
| 520 | 621 | TUCSON | Arizona | QWEST CORPORATION | RBOC | More |
| 530 | 621 | PLVL WEST | California | PACIFIC BELL | RBOC | More |
| 540 | 621 | FREDECKSBG | Virginia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA | WIRELESS PROV | More |
| 541 | 621 | MEDFORD | Oregon | UNITED STATES CELLULAR - OR | WIRELESS PROV | More |
| 559 | 621 | FRESNO | California | PACIFIC BELL | RBOC | More |
| 561 | 621 | WPALMBEACH | Florida | ONVOY SPECTRUM, LLC | | More |
| 562 | 621 | ALAMITOS | California | FRONTIER CALIFORNIA INC. | IND. TELCO | More |
| 567 | 621 | FTRECOVERY | Ohio | LEVEL 3 COMMUNICATIONS, LLC - OH | CLEC | More |
| 570 | 621 | POTTSVILLE | Pennsylvania | VERIZON PENNSYLVANIA, INC. | RBOC | More |
| 571 | 621 | MANASSAS | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 573 | 621 | SIKESTON | Missouri | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | | More |
| 574 | 621 | OSCEOLA | Indiana | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | | More |
| 575 | 621 | LAS CRUCES | New Mexico | T-MOBILE USA, INC. | WIRELESS PROV | More |
| 580 | 621 | FREEDOM | Oklahoma | PIONEER TEL. COOP., INC. | IND. TELCO | More |
| 585 | 621 | ROCHESTER | New York | FRONTIER TELEPHONE OF ROCHESTER, INC. | IND. TELCO | More |
| 601 | 621 | MERIDIAN | Mississippi | LEVEL 3 COMMUNICATIONS, LLC - MS | | More |
| 602 | 621 | PHOENIX | Arizona | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | WIRELESS PROV | More |
| 603 | 621 | MANCHESTER | New Hampshire | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | RBOC | More |
| 604 | 621 | Abbotsford | British Columbia | Rogers Communications Partnership (Wireless) | WIRELESS PROV | More |
| 605 | 621 | MADISON | South Dakota | INTERSTATE TELECOMMUNICATIONS COOPERATIVE, INC. | | More |
| 606 | 621 | HARLAN | Kentucky | LEVEL 3 COMMUNICATIONS, LLC - KY | CLEC | More |
| 607 | 621 | BINGHAMTON | New York | TC SYSTEMS, INC. - NY | CAP | More |
| 608 | 621 | PLATTEVL | Wisconsin | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 609 | 621 | PEMBERTON | New Jersey | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | CLEC | More |
| 610 | 621 | READING | Pennsylvania | LEVEL 3 COMMUNICATIONS, LLC - PA | CLEC | More |
| 612 | 621 | TWINCITIES | Minnesota | USA MOBILITY WIRELESS, INC. | WIRELESS PROV | More |
| 613 | 621 | Carleton Place | Ontario | Bell Mobility | WIRELESS PROV | More |
| 614 | 621 | COLUMBUS | Ohio | OHIO BELL TEL CO | RBOC | More |
| 615 | 621 | NASHVILLE | Tennessee | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | | More |
| 616 | 621 | HARTFORD | Michigan | FRONTIER NORTH, INC. - MI | IND. TELCO | More |
| 617 | 621 | CAMBRIDGE | Massachusetts | VERIZON NEW ENGLAND INC. | RBOC | More |
| 618 | 621 | EWING | Illinois | VONAGE AMERICA LLC | | More |
| 619 | 621 | CHULAVISTA | California | NEW CINGULAR WIRELESS PCS, LLC | WIRELESS PROV | More |
| 620 | 621 | LIBERAL | Kansas | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
| 626 | 621 | AZUSA | California | BANDWIDTH.COM CLEC, LLC - CA | | More |
| 630 | 621 | W CHICAGO | Illinois | LEVEL 3 COMMUNICATIONS, LLC - IL | CLEC | More |
| 631 | 621 | NEW YORK CITY | New York | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | CLEC | More |
| 641 | 621 | PELLA | Iowa | WINDSTREAM IOWA COMMUNICATIONS, INC. | | More |
| 646 | 621 | MANHATTAN | New York | METROPCS, INC. | | More |
| 647 | 621 | Toronto | Ontario | Rogers Communications Partnership (Wireless) | WIRELESS PROV | More |
| 650 | 621 | PALO ALTO | California | PACIFIC BELL | RBOC | More |
| 651 | 621 | TWINCITIES | Minnesota | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | CLEC | More |
| 657 | 621 | WESTMINSTR | California | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | WIRELESS PROV | More |
| 660 | 621 | PRAIRIE LICK | Missouri | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | | More |
| 661 | 621 | LOS ANGELES | California | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | | More |
| 662 | 621 | CLARKSDALE | Mississippi | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | RBOC | More |
| 678 | 621 | ATLANTA NORTHEAST | Georgia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | WIRELESS PROV | More |
| 681 | 621 | BLUEFIELD | West Virginia | T-MOBILE USA, INC. | WIRELESS PROV | More |
| 689 | 621 | KISSIMMEE | Florida | ONVOY SPECTRUM, LLC | | More |
| 701 | 621 | STANLEY | North Dakota | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND | WIRELESS PROV | More |
| 702 | 621 | LAS VEGAS | Nevada | XO NEVADA, LLC | CLEC | More |
| 703 | 621 | WASHINGTON DC | Virginia | LEVEL 3 COMMUNICATIONS, LLC - VA | CLEC | More |
| 704 | 621 | CHARLOTTE | North Carolina | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC | WIRELESS PROV | More |
| 705 | 621 | Sudbury | Ontario | Bell Aliant Regional Communications | | More |
| 706 | 621 | ATLANTA | Georgia | LEVEL 3 COMMUNICATIONS, LLC - GA | CLEC | More |
| 707 | 621 | UKIAH | California | UNITED STATES CELLULAR - CA | CLEC | More |
| 708 | 621 | NORTHBROOK | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
| 709 | 621 | CHANGE ISLAND | Newfoundland | Aliant Telecom (NF) | IND. TELCO | More |
| 712 | 621 | RED OAK | Iowa | UNITED STATES CELLULAR - IA | WIRELESS PROV | More |
| 713 | 621 | HOUSTON NATIONAL | Texas | SOUTHWESTERN BELL | RBOC | More |
| 714 | 621 | ORANGE | California | PACIFIC BELL | RBOC | More |
| 715 | 621 | PRESQUE IS | Wisconsin | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
| 716 | 621 | ROCHESTER | New York | TIME WARNER CABLE INFO SVCE (NEW YORK) LLC-NY | | More |
| 717 | 621 | LANCASTER | Pennsylvania | METROPCS, INC. | | More |
| 718 | 621 | NYCZ 7 | New York | VERIZON NEW YORK, INC. | RBOC | More |
| 719 | 621 | PUEBLO | Colorado | COMCAST IP PHONE, LLC | | More |
| 720 | 621 | DENVER | Colorado | NEW CINGULAR WIRELESS PCS, LLC | WIRELESS PROV | More |
| 724 | 621 | PROSPECT | Pennsylvania | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
| 727 | 621 | CLEARWATER | Florida | NUSO, LLC | | More |
| 731 | 621 | GREENFIELD | Tennessee | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | WIRELESS PROV | More |
| 732 | 621 | NEW BRUNSWICK | New Jersey | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | CAP | More |
| 734 | 621 | DETROIT | Michigan | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | CLEC | More |
| 740 | 621 | NEW LEXINGTON | Ohio | AERIAL COMMUNICATIONS, INC. | WIRELESS PROV | More |
| 757 | 621 | NORFOLK ZONE 2 | Virginia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA | WIRELESS PROV | More |
| 760 | 621 | SAN MARCOS | California | LEVEL 3 COMMUNICATIONS, LLC - CA | CLEC | More |
| 765 | 621 | ANDERSON | Indiana | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
| 770 | 621 | TUCKER | Georgia | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | RBOC | More |
| 772 | 621 | PORT ST LUCIE | Florida | METROPCS, INC. | | More |
| 773 | 621 | CHICGOZN03 | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
| 775 | 621 | RENO | Nevada | MATRIX TELECOM, LLC. S/I/I TNCI - NV | CLEC | More |
| 780 | 621 | DRAYTON VALLEY | Alberta | TELUS | IND. TELCO | More |
| 781 | 621 | WAKEFIELD | Massachusetts | RCN TELECOM SERVICES, INC. - MA | CLEC | More |
| 785 | 621 | HAYS KANSAS | Kansas | NEX-TECH, LLC - KS | CLEC | More |
| 786 | 621 | MIAMI | Florida | WINDSTREAM NUVOX, INC. - FL | CLEC | More |
| 787 | 621 | MANATI | Puerto Rico | LIBERTY MOBILE PUERTO RICO INC. | CLEC | More |
| 801 | 621 | OGDEN | Utah | QWEST CORPORATION | RBOC | More |
| 803 | 621 | BARNWELL | South Carolina | IDT AMERICA, CORP. - SC | | More |
| 804 | 621 | CHESTER | Virginia | LEVEL 3 COMMUNICATIONS, LLC - VA | CLEC | More |
| 805 | 621 | SAN LUIS OBISPO | California | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | WIRELESS PROV | More |
| 806 | 621 | BORGER | Texas | LEVEL 3 COMMUNICATIONS, LLC - TX | CLEC | More |
| 807 | 621 | Thunder Bay | Ontario | Thunder Bay Mobility | | More |
| 808 | 621 | WAHIAWA | Hawaii | HAWAIIAN TELCOM, INC. - HI | IND. TELCO | More |
| 810 | 621 | LENNON | Michigan | LENNON TEL. CO. | IND. TELCO | More |
| 812 | 621 | VERSAILLES | Indiana | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN | WIRELESS PROV | More |
| 813 | 621 | TAMPA | Florida | FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA | IND. TELCO | More |
| 814 | 621 | MARIENVL | Pennsylvania | ONVOY, LLC - PA | | More |
| 815 | 621 | CHICAGO | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
| 816 | 621 | KANSASCITY | Missouri | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | | More |
| 817 | 621 | ARLINGTON | Texas | USA MOBILITY WIRELESS, INC. | WIRELESS PROV | More |
| 818 | 621 | SHERMAN OAKS | California | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | WIRELESS PROV | More |
| 819 | 621 | PLESSISVILLE | Quebec | Bell Canada | IND. TELCO | More |
| 828 | 621 | BARNARDSVL | North Carolina | CHARTER FIBERLINK NC-CCO, LLC - NC | | More |
| 831 | 621 | SAN FRANCISCO | California | LEVEL 3 COMMUNICATIONS, LLC - CA | CLEC | More |
| 832 | 621 | HOUSTON | Texas | MATRIX TELECOM, LLC. S/I/I TNCI - TX | CLEC | More |
| 843 | 621 | FLORENCE | South Carolina | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC | WIRELESS PROV | More |
| 845 | 621 | MAHOPAC | New York | VERIZON NEW YORK, INC. | RBOC | More |
| 847 | 621 | CHICAGO | Illinois | OVATION COMMUNICATIONS OF ILLINOIS, INC. | CLEC | More |
| 850 | 621 | FORT WALTON BEACH | Florida | NEW CINGULAR WIRELESS PCS, LLC - GA | WIRELESS PROV | More |
| 856 | 621 | SALEM | New Jersey | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 858 | 621 | SAN DIEGO | California | PACIFIC BELL | RBOC | More |
| 859 | 621 | LEXINGTON | Kentucky | METROPCS, INC. | | More |
| 860 | 621 | SOUTHINGTON | Connecticut | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | IND. TELCO | More |
| 862 | 621 | BLOOMFIELD | New Jersey | LEVEL 3 COMMUNICATIONS, LLC - NJ | CLEC | More |
| 864 | 621 | SPARTANBURG | South Carolina | SUNCOM DBA T-MOBILE USA | PCS | More |
| 865 | 621 | KNOXVILLE | Tennessee | NEW CINGULAR WIRELESS PCS, LLC - GA | WIRELESS PROV | More |
| 867 | 621 | Fort Smith | Yukon Territory | Bell Mobility | WIRELESS PROV | More |
| 870 | 621 | LEAD HILL | Arkansas | METROPCS, INC. | | More |
| 901 | 621 | WESTWHITEV | Tennessee | VONAGE AMERICA LLC | | More |
| 902 | 621 | HUNTER RIVER | PE | Aliant Telecom (PEI) | IND. TELCO | More |
| 903 | 621 | GREENVILLE | Texas | AMERICAN MESSAGING SERVICES, LLC | | More |
| 904 | 621 | ORANGE PARK | Florida | DELTACOM, INC. - FL | CLEC | More |
| 905 | 621 | AJAX PICKERING | Ontario | TELUS Mobility | PCS | More |
| 907 | 621 | PUMP STATION 2 | Alaska | ALASCOM, INC. DBA AT&T ALASKA | IND. TELCO | More |
| 908 | 621 | HOPE | New Jersey | LEVEL 3 COMMUNICATIONS, LLC - NJ | CLEC | More |
| 909 | 621 | CLAREMONT | California | FRONTIER CALIFORNIA INC. | IND. TELCO | More |
| 910 | 621 | PARKTON | North Carolina | TELEPORT COMMUNICATIONS AMERICA, LLC - NC | CLEC | More |
| 912 | 621 | MACON | Georgia | BANDWIDTH.COM CLEC, LLC - GA | | More |
| 913 | 621 | KANSAS CITY | Kansas | SOUTHWESTERN BELL | RBOC | More |
| 914 | 621 | MAHOPAC | New York | VERIZON NEW YORK, INC. | RBOC | More |
| 915 | 621 | EL PASO HACIENDA | Texas | SOUTHWESTERN BELL | RBOC | More |
| 916 | 621 | SCRM NORTH | California | NEW CINGULAR WIRELESS PCS, LLC | WIRELESS PROV | More |
| 917 | 621 | NYC ZONE 2 - MANHAT | New York | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 918 | 621 | TULSA | Oklahoma | SOUTHWESTERN BELL | RBOC | More |
| 919 | 621 | RALEIGH | North Carolina | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC | WIRELESS PROV | More |
| 920 | 621 | GREEN BAY | Wisconsin | NEW CELL DBA CELLCOM | WIRELESS PROV | More |
| 925 | 621 | CONCORD | California | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | | More |
| 929 | 621 | NWYRCYZN07 | New York | ONVOY SPECTRUM, LLC | | More |
| 931 | 621 | NORTH SPRINGS | Tennessee | TWIN LAKES TEL. COOP. CORP. | IND. TELCO | More |
| 936 | 621 | TRINITY | Texas | KMC TELECOM II, INC. - TX | CLEC | More |
| 937 | 621 | GREENVILLE | Ohio | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
| 940 | 621 | BURKBURNTT | Texas | CHOICE WIRELESS, LC | | More |
| 941 | 621 | FORT MEYERS | Florida | AT&T - LOCAL | CLEC | More |
| 949 | 621 | IRVINE | California | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | WIRELESS PROV | More |
| 951 | 621 | CORONA | California | BANDWIDTH.COM CLEC, LLC - CA | | More |
| 954 | 621 | OJUS | Florida | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | CLEC | More |
| 956 | 621 | BROWNSVILLE | Texas | TIME WARNER CBLE INFO SVC (TX) DBA TIME WARNER CBL | | More |
| 970 | 621 | BERTHOUD | Colorado | AMERICAN MESSAGING SERVICES, LLC | | More |
| 972 | 621 | IRVING | Texas | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | IND. TELCO | More |
| 973 | 621 | NEWARK | New Jersey | VERIZON NEW JERSEY, INC. | RBOC | More |
| 978 | 621 | FRAMINGHAM | Massachusetts | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | WIRELESS PROV | More |
| 980 | 621 | CONCORD | North Carolina | NEW CINGULAR WIRELESS PCS, LLC - GA | WIRELESS PROV | More |
| 985 | 621 | INDEPNDNCE | Louisiana | ONVOY, LLC - LA | | More |
| 989 | 621 | MOUNT PLEASANT | Michigan | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | | More |
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