NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 603-285 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | DOVER | NH | |
| 603-317 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | MILAN | NH | |
| 603-324 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NASHUA | NH | |
| 603-325 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | NEW BOSTON | NH | |
| 603-338 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | KEENE | NH | |
| 603-350 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | MILTON | NH | |
| 603-351 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | GOFFSTOWN | NH | |
| 603-390 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | JEFFERSON | NH | |
| 603-395 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | EXETER | NH | |
| 603-420 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | MERRIMACK | NH | |
| 603-460 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | DEERFIELD | NH | |
| 603-503 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | LANCASTER | NH | |
| 603-552 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | DERRY | NH | |
| 603-573 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | CONCORD | NH | |
| 603-575 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | LITTLETON | NH | |
| 603-587 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | CANDIA | NH | |
| 603-592 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | SPOFFORD | NH | |
| 603-597 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | LYME | NH | |
| 603-613 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | COLEBROOK | NH | |
| 603-637 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | BEDFORD | NH | |
| 603-667 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | LEBANON | NH | |
| 603-671 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | FRANKLIN | NH | |
| 603-677 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | MEREDITH | NH | |
| 603-690 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | CLAREMONT | NH | |
| 603-712 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | PIKE | NH | |
| 603-729 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | TILTON | NH | |
| 603-730 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | NO CONWAY | NH | |
| 603-732 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | MILFORD | NH | |
| 603-734 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | EPPING | NH | |
| 603-739 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | NOWOODSTOK | NH | |
| 603-751 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | PELHAM | NH | |
| 603-779 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | PLYMOUTH | NH | |
| 603-784 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | PETERBROGH | NH | |
| 603-797 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | PLAISTOW | NH | |
| 603-824 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | SALEM | NH | |
| 603-829 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | SUNAPEE | NH | |
| 603-861 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | TAMWORTH | NH | |
| 603-941 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | WOLFEBORO | NH | |
| 605-836 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CANTON | SD | |
| 609-367 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | MEDFORD | NJ | |
| 609-378 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | PLAINSBORO | NJ | |
| 609-388 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | VINCENTOWN | NJ | |
| 609-450 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | LAWRENCEVL | NJ | |
| 609-460 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | LAMBERTVL | NJ | |
| 609-469 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | HIGHTSTOWN | NJ | |
| 609-493 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | EWING | NJ | |
| 609-495 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | CRANBURY | NJ | |
| 609-496 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | BORDENTOWN | NJ | |
| 609-503 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | TRENTON | NJ | |
| 609-524 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | PRINCETON | NJ |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.