| EXCHANGE |
CARRIER |
| 508-213 |
ACC NATIONAL TELECOM CORPORATION - MA |
| 508-215 |
TELEPORT COMMUNICATIONS GROUP - BOSTON |
| 508-217 |
ACC NATIONAL TELECOM CORPORATION - MA |
| 508-310 |
ALLEGIANCE TELECOM, INC. - MA |
| 508-342 |
PAETEC COMMUNICATIONS, INC. |
| 508-356 |
PAETEC COMMUNICATIONS, INC. |
| 508-365 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-371 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-400 |
NEXTEL COMMUNICATIONS |
| 508-408 |
MCIMETRO, ATS, INC. |
| 508-409 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-417 |
MCIMETRO, ATS, INC. |
| 508-444 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-449 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-452 |
PAETEC COMMUNICATIONS, INC. |
| 508-453 |
PAETEC COMMUNICATIONS, INC. |
| 508-465 |
|
| 508-484 |
ALLEGIANCE TELECOM, INC. - MA |
| 508-503 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-505 |
MCIMETRO, ATS, INC. |
| 508-507 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-532 |
PAETEC COMMUNICATIONS, INC. |
| 508-534 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-535 |
PAETEC COMMUNICATIONS, INC. |
| 508-562 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-598 |
MCIMETRO, ATS, INC. |
| 508-599 |
MCIMETRO, ATS, INC. |
| 508-623 |
PAETEC COMMUNICATIONS, INC. |
| 508-638 |
PAETEC COMMUNICATIONS, INC. |
| 508-692 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-713 |
MCIMETRO, ATS, INC. |
| 508-720 |
PAETEC COMMUNICATIONS, INC. |
| 508-739 |
ALLEGIANCE TELECOM, INC. - MA |
| 508-745 |
MCIMETRO, ATS, INC. |
| 508-762 |
ACC NATIONAL TELECOM CORPORATION - MA |
| 508-784 |
PAETEC COMMUNICATIONS, INC. |
| 508-796 |
ALLEGIANCE TELECOM, INC. - MA |
| 508-810 |
MCIMETRO, ATS, INC. |
| 508-818 |
PAETEC COMMUNICATIONS, INC. |
| 508-819 |
PAETEC COMMUNICATIONS, INC. |
| 508-858 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-916 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-934 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-938 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-948 |
ACC NATIONAL TELECOM CORPORATION - MA |
| 508-955 |
|
| 508-960 |
GLOBAL CROSSING LOCAL SERVICES, INC.-MA |
| 508-967 |
PAETEC COMMUNICATIONS, INC. |
