LEVEL 3 COMMUNICATIONS, LLC - MA
10 prefixes in 857 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 857-209 | CAMBRIDGE | 4018 | 2001-10-11 | Yes |
| 857-241 | BOSTON | 4018 | 2006-10-24 | Yes |
| 857-296 | BOSTON | 4018 | 2017-08-16 | Yes |
| 857-305 | BOSTON | 4018 | 2013-07-19 | Yes |
| 857-413 | BOSTON | 4018 | 2005-09-19 | Yes |
| 857-453 | BOSTON | 4018 | 2005-05-19 | Yes |
| 857-504 | BOSTON | 4018 | — | Yes |
| 857-706 | CAMBRIDGE | 4018 | — | Yes |
| 857-776 | CHELSEA | 4018 | 2001-06-29 | Yes |
| 857-972 | BOSTON | 4018 | 2015-07-29 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.