NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026
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 |
|---|---|---|---|---|---|
| 313-422 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN3 | MI | |
| 313-449 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN2 | MI | |
| 313-450 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN5 | MI | |
| 313-457 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN6 | MI | |
| 313-557 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN1 | MI | |
| 313-651 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN4 | MI | |
| 313-731 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN3 | MI | |
| 313-732 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN2 | MI | |
| 313-733 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN3 | MI | |
| 313-736 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN4 | MI | |
| 313-743 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN2 | MI | |
| 313-749 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN6 | MI | |
| 313-766 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN5 | MI | |
| 313-768 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN6 | MI | |
| 313-915 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN4 | MI | |
| 313-952 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN5 | MI | |
| 313-989 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN1 | MI | |
| 517-268 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | HOLT | MI | |
| 517-308 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DIMONDALE | MI | |
| 517-318 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | LANSING | MI | |
| 517-319 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | LANSING | MI | |
| 517-338 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | HOWELL | MI | |
| 586-258 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | WARREN | MI | |
| 586-261 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | CENTERLINE | MI | |
| 586-262 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | UTICA | MI | |
| 586-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROSEVILLE | MI | |
| 586-283 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | WARREN | MI | |
| 586-314 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | UTICA | MI | |
| 586-439 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROSEVILLE | MI | |
| 586-461 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MT CLEMENS | MI | |
| 586-467 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | CENTERLINE | MI | |
| 586-569 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MT CLEMENS | MI | |
| 586-601 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROSEVILLE | MI | |
| 586-627 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MT CLEMENS | MI | |
| 586-722 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | WARREN | MI | |
| 586-782 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | CENTERLINE | MI | |
| 586-802 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | UTICA | MI | |
| 586-816 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | WASHINGTON | MI | |
| 586-819 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | WARREN | MI | |
| 586-880 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | CENTERLINE | MI | |
| 586-888 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROSEVILLE | MI | |
| 586-913 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MT CLEMENS | MI | |
| 586-930 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | UTICA | MI | |
| 616-222 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | GRAND RPDS | MI | |
| 616-224 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | GRAND RPDS | MI | |
| 616-254 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | GRAND RPDS | MI | |
| 616-284 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | GRAND RPDS | MI | |
| 616-359 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DORR | MI | |
| 616-366 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | BYRON CTR | MI | |
| 616-371 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | JAMESTOWN | MI |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.