MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD
45 prefixes in 410 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 410-200 | EASTON | 7228 | 2004-05-27 | Yes |
| 410-246 | BALTIMORE | 7228 | — | Yes |
| 410-314 | ARBUTUS | 7228 | — | Yes |
| 410-317 | ARGRGBSNIS | 7228 | — | Yes |
| 410-401 | BRYNPKLNCM | 7228 | — | Yes |
| 410-402 | CATONSVL | 7228 | — | Yes |
| 410-403 | COCKEYSVL | 7228 | — | Yes |
| 410-406 | ESSEX | 7228 | — | Yes |
| 410-412 | GLENBURNIE | 7228 | — | Yes |
| 410-413 | PIKESVILLE | 7228 | — | Yes |
| 410-454 | BALTIMORE | 7228 | — | — |
| 410-487 | GLENBURNIE | 7228 | — | Yes |
| 410-567 | ELKRIDGE | 7228 | — | Yes |
| 410-600 | BERLIN | 7228 | 2006-04-25 | Yes |
| 410-616 | TOWSON | 7228 | — | Yes |
| 410-622 | BALTIMORE | 7228 | 2011-08-12 | Yes |
| 410-630 | CHASE | 7228 | — | Yes |
| 410-645 | WOODLAWN | 7228 | — | Yes |
| 410-657 | PARKVILLE | 7228 | — | Yes |
| 410-670 | EDGEWOOD | 7228 | — | Yes |
| 410-696 | ELLICOTTCY | 7228 | — | Yes |
| 410-697 | MILLERSVL | 7228 | — | Yes |
| 410-698 | FORK | 7228 | — | Yes |
| 410-701 | RANDALLSTN | 7228 | — | Yes |
| 410-702 | REISTERSTN | 7228 | — | Yes |
| 410-704 | TOWSON | 7228 | — | — |
| 410-709 | SPARROWSPT | 7228 | — | Yes |
| 410-753 | PIKESVILLE | 7228 | — | Yes |
| 410-774 | CROFTON | 7228 | — | Yes |
| 410-777 | SEVERNA PK | 7228 | — | Yes |
| 410-786 | WOODLAWN | 7228 | — | — |
| 410-801 | BALTIMORE | 7228 | — | Yes |
| 410-842 | TOWSON | 7228 | — | Yes |
| 410-846 | SEVERN | 7228 | — | Yes |
| 410-864 | BALTIMORE | 7228 | — | Yes |
| 410-874 | ODENTON | 7228 | — | Yes |
| 410-878 | BALTIMORE | 7228 | — | Yes |
| 410-881 | SHERWD FOR | 7228 | — | Yes |
| 410-891 | COCKEYSVL | 7228 | — | Yes |
| 410-904 | WATERLO238 | 7228 | — | Yes |
| 410-907 | WOODLAWN | 7228 | — | Yes |
| 410-910 | COLUMBIA | 7228 | — | — |
| 410-919 | ANNAPOLIS | 7228 | — | Yes |
| 410-949 | BALTIMORE | 7228 | — | Yes |
| 410-970 | SYKESVILLE | 7228 | — | 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.