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 |
|---|---|---|---|---|---|
| 2020-07-02 | 989-346 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MIO | MI |
| 2020-06-12 | 616-310 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | COOPERSVL | MI |
| 2018-10-31 | 989-931 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | FARWELL | MI |
| 2017-10-24 | 517-722 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | MASON | MI |
| 2016-11-03 | 269-243 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | BATTLE CRK | MI |
| 2015-01-02 | 734-685 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROMULUS | MI |
| 2014-06-25 | 734-304 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | TRENTON | MI |
| 2013-07-30 | 616-552 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | GRAND RPDS | MI |
| 2013-05-13 | 313-725 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN1 | MI |
| 2012-03-05 | 269-459 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | KALAMAZOO | MI |
| 2006-03-20 | 810-354 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | FENTON | MI |
| 2006-03-02 | 517-709 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | HOLT | MI |
| 2006-02-09 | 517-966 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DIMONDALE | MI |
| 2006-01-27 | 517-968 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DANSVILLE | MI |
| 2005-10-17 | 517-600 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DIMONDALE | MI |
| 2005-09-22 | 248-714 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MILFDWH LK | MI |
| 2005-09-15 | 517-222 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DANSVILLE | MI |
| 2005-07-13 | 517-876 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | HOLT | MI |
| 2005-03-16 | 517-233 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | EATON RPD | MI |
| 2005-03-16 | 517-345 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DIMONDALE | MI |
| 2005-03-16 | 517-444 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | CHARLOTTE | MI |
| 2005-02-11 | 517-466 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DANSVILLE | MI |
| 2005-01-26 | 810-344 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | GRANDBLANC | MI |
| 2004-03-05 | 517-386 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | EATON RPD | MI |
| 2003-07-11 | 906-464 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ISHPEMING | MI |
| 2003-07-11 | 989-484 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | SAGINAW | MI |
| 2002-03-12 | 248-856 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | AUBURN HTS | MI |
| 2002-01-16 | 586-281 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROMEO | MI |
| 2001-08-15 | 313-748 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN1 | MI |
| 2001-05-24 | 248-971 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | BIRMINGHAM | MI |
| 2001-05-16 | 810-937 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | PORT HURON | MI |
| 2001-01-29 | 734-749 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROCKWOOD | MI |
| 231-486 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | TRAVERSECY | MI | |
| 248-209 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | PONTIAC | MI | |
| 248-218 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROCHESTER | MI | |
| 248-239 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | PONTIAC | MI | |
| 248-260 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | AUBURN HTS | MI | |
| 248-264 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | SOUTH LYON | MI | |
| 248-270 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | AUBURN HTS | MI | |
| 248-281 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | SOUTHFIELD | MI | |
| 248-282 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | BIRMINGHAM | MI | |
| 248-283 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | BIRMINGHAM | MI | |
| 248-284 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROYAL OAK | MI | |
| 248-287 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | LAKE ORION | MI | |
| 248-291 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROYAL OAK | MI | |
| 248-292 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | PONTIAC | MI | |
| 248-295 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | WALLEDLAKE | MI | |
| 248-319 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | NORTHVILLE | MI | |
| 248-365 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | PONTIAC | MI | |
| 248-369 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | HOLLY | 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.