| Exchange | Rate Center | State | Operating Company | 
      
        | 440-439 | BEDFORD | OH | AMERITECH OHIO | 
      
        | 440-440 |  | OH |  | 
      
        | 440-442 | HILLCREST | OH | AMERITECH OHIO | 
      
        | 440-443 | HILLCREST | OH | FIRST COMMUNICATIONS LLC DBA CORECOMM - OH | 
      
        | 440-445 | MENTOR | OH | XO OHIO, INC. | 
      
        | 440-446 | HILLCREST | OH | AMERITECH OHIO | 
      
        | 440-447 | BRECKSVL | OH | LEVEL 3 COMMUNICATIONS, LLC - OH | 
      
        | 440-448 | GATESMILLS | OH | ICG TELECOM GROUP - OH | 
      
        | 440-449 | HILLCREST | OH | AMERITECH OHIO | 
      
        | 440-452 | ELYRIA | OH | SPRINT SPECTRUM L.P. | 
      
        | 440-453 | ELYRIA | OH | SPRINT SPECTRUM L.P. | 
      
        | 440-454 | OLMSTEDFLS | OH | T-MOBILE USA, INC. | 
      
        | 440-456 | HILLCREST | OH | AMERITECH OHIO | 
      
        | 440-457 | NOROYALTON | OH | MCIMETRO, ATS, INC. | 
      
        | 440-458 | ELYRIA | OH | WINDSTREAM OHIO, INC. | 
      
        | 440-460 | HILLCREST | OH | AMERITECH OHIO | 
      
        | 440-461 | HILLCREST | OH | AMERITECH OHIO | 
      
        | 440-463 | WILLOUGHBY | OH | NEW CINGULAR WIRELESS PCS, LLC - IL | 
      
        | 440-465 | CLEVELAND | OH | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 
      
        | 440-466 | GENEVA | OH | WINDSTREAM WESTERN RESERVE, INC. | 
      
        | 440-471 | TRINITY | OH | GLOBAL CROSSING LOCAL SERVICES, INC.-OH | 
      
        | 440-473 | HILLCREST | OH | AMERITECH OHIO | 
      
        | 440-474 | TRUMBULL | OH | WINDSTREAM WESTERN RESERVE, INC. | 
      
        | 440-476 | CLEVELAND | OH | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 
      
        | 440-477 | WILLOUGHBY | OH | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 
      
        | 440-478 | WILLOUGHBY | OH | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 
      
        | 440-479 | WILLOUGHBY | OH | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 
      
        | 440-483 | HILLCREST | OH | AMERITECH OHIO | 
      
        | 440-484 | HILLCREST | OH | ICG TELECOM GROUP - OH | 
      
        | 440-486 |  | OH |  | 
      
        | 440-487 | WILLOUGHBY | OH | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 
      
        | 440-488 | WILLOUGHBY | OH | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 
      
        | 440-489 | TRINITY | OH | AMERICAN MESSAGING (AM), INC. | 
      
        | 440-490 | CHESTERLD | OH | TELEPORT COMMUNICATIONS GROUP, INC. - OH | 
      
        | 440-492 | BURTON | OH | AMERICAN MESSAGING (AM), INC. | 
      
        | 440-493 | WILLOUGHBY | OH | AMERICAN MESSAGING (AM), INC. | 
      
        | 440-494 | WICKLIFFE | OH | TELEPORT COMMUNICATIONS GROUP, INC. - OH | 
      
        | 440-497 | WILLOUGHBY | OH | TELEPORT COMMUNICATIONS GROUP, INC. - OH | 
      
        | 440-498 | CHAGRINFLS | OH | AMERITECH OHIO | 
      
        | 440-499 | VICTORY | OH | GLOBAL CROSSING LOCAL SERVICES, INC.-OH | 
      
        | 440-500 |  | OH |  | 
      
        | 440-503 | BEREA | OH | SPRINT SPECTRUM L.P. | 
      
        | 440-505 | CHAGRINFLS | OH | XO OHIO, INC. | 
      
        | 440-506 | ELYRIA | OH | T-MOBILE USA, INC. | 
      
        | 440-507 | WILLOUGHBY | OH | ARCH WIRELESS HOLDINGS, INC. | 
      
        | 440-508 | OLMSTEDFLS | OH | MCIMETRO, ATS, INC. | 
      
        | 440-510 | WILLOUGHBY | OH | ALLEGIANCE TELECOM, INC. - OH | 
      
        | 440-511 |  | OH |  | 
      
        | 440-512 | BEREA | OH | MCIMETRO, ATS, INC. | 
      
        | 440-516 | WICKLIFFE | OH | AMERITECH OHIO | 
      
        | 440-519 | CHAGRINFLS | OH | AMERITECH OHIO | 
      
        | 440-520 | WILLOUGHBY | OH | NEW CINGULAR WIRELESS PCS, LLC - IL | 
      
        | 440-521 | WILLOUGHBY | OH | CLEVELAND UNLIMITED, INC. | 
      
        | 440-522 | LORAIN | OH | NEW CINGULAR WIRELESS PCS, LLC - IL | 
      
        | 440-523 | CLEVELAND | OH | ALLTEL COMMUNICATIONS, INC. - OH | 
      
        | 440-524 |  | OH |  | 
      
        | 440-525 | WILLOUGHBY | OH | MCIMETRO, ATS, INC. | 
      
        | 440-526 | BRECKSVL | OH | AMERITECH OHIO | 
      
        | 440-527 | WILLOUGHBY | OH | BROADWING COMMUNICATIONS, LLC - OH | 
      
        | 440-528 | CHAGRINFLS | OH | FIRST COMMUNICATIONS LLC DBA CORECOMM - OH | 
      
        | 440-530 | WILLOUGHBY | OH | TELEPORT COMMUNICATIONS GROUP, INC. - OH | 
      
        | 440-531 |  | OH |  | 
      
        | 440-532 | BEREA | OH | T-MOBILE USA, INC. | 
      
        | 440-533 | GATESMILLS | OH | T-MOBILE USA, INC. | 
      
        | 440-534 | MENTOR | OH | ICG TELECOM GROUP - OH | 
      
        | 440-536 | ASHTABULA | OH | NEXTEL COMMUNICATIONS, INC. | 
      
        | 440-537 | WILLOUGHBY | OH | ALLTEL COMMUNICATIONS, INC. - OH | 
      
        | 440-539 | CLEVELAND | OH | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 
      
        | 440-540 | BEDFORD | OH | LEVEL 3 COMMUNICATIONS, LLC - OH | 
      
        | 440-541 | LORAIN | OH | ICG TELECOM GROUP - OH | 
      
        | 440-542 | CHAGRINFLS | OH | AMERITECH OHIO | 
      
        | 440-543 | BAINBRIDGE | OH | WINDSTREAM WESTERN RESERVE, INC. | 
      
        | 440-544 | HILLCREST | OH | TELEPORT COMMUNICATIONS GROUP, INC. - OH | 
      
        | 440-545 | VICTORY | OH | BROADWING COMMUNICATIONS, LLC - OH | 
      
        | 440-546 | BRECKSVL | OH | AMERITECH OHIO | 
      
        | 440-547 | WILLOUGHBY | OH | ALLTEL OHIO, LP - OH | 
      
        | 440-548 | PARKMAN | OH | WINDSTREAM WESTERN RESERVE, INC. | 
      
        | 440-549 | WICKLIFFE | OH | BROADWING COMMUNICATIONS, LLC - OH | 
      
        | 440-550 | BRECKSVL | OH | LEVEL 3 COMMUNICATIONS, LLC - OH | 
      
        | 440-551 | PAINESVL | OH | XO OHIO, INC. | 
      
        | 440-552 | CLEVELAND | OH | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 
      
        | 440-553 | WILLOUGHBY | OH | ARCH WIRELESS HOLDINGS, INC. | 
      
        | 440-554 | CLEVELAND | OH | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 
      
        | 440-555 | CLEVELAND | OH | AMERITECH OHIO | 
      
        | 440-556 | VICTORY | OH | GLOBAL CROSSING LOCAL SERVICES, INC.-OH | 
      
        | 440-557 | RUSSELL | OH | SPRINT COMMUNICATIONS COMPANY, L.P. - OH | 
      
        | 440-562 | WILLOUGHBY | OH | ARCH WIRELESS HOLDINGS, INC. | 
      
        | 440-563 | ROCK CREEK | OH | WINDSTREAM WESTERN RESERVE, INC. | 
      
        | 440-564 | NEWBURY | OH | WINDSTREAM WESTERN RESERVE, INC. | 
      
        | 440-565 | HILLCREST | OH | LEVEL 3 COMMUNICATIONS, LLC - OH | 
      
        | 440-567 | WILLOUGHBY | OH | ALLTEL COMMUNICATIONS, INC. - OH | 
      
        | 440-569 | WICKLIFFE | OH | GLOBAL CROSSING LOCAL SERVICES, INC.-OH | 
      
        | 440-570 | VICTORY | OH | NEW CINGULAR WIRELESS PCS, LLC - IL | 
      
        | 440-571 | WILLOUGHBY | OH | AMERITECH OHIO | 
      
        | 440-572 | STRONGSVL | OH | AMERITECH OHIO | 
      
        | 440-573 | HILLCREST | OH | ALLEGIANCE TELECOM, INC. - OH | 
      
        | 440-574 | OBERLIN | OH | SPRINT SPECTRUM L.P. | 
      
        | 440-575 | TRINITY | OH | ALLEGIANCE TELECOM, INC. - OH | 
      
        | 440-576 | JEFFERSON | OH | UNITED TEL. CO. OF OHIO | 
      
        | 440-577 | PIERPONT | OH | WINDSTREAM WESTERN RESERVE, INC. |