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.
Most active assignees, all time
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2006-02-07 | 304-930 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHARLES TN | WV |
| 2006-02-03 | 631-602 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | SHELTER IS | NY |
| 2006-02-02 | 774-855 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ASSONET | MA |
| 2006-02-02 | 828-742 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | NEWLAND | NC |
| 2006-02-02 | 914-292 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | BEDFORDVLG | NY |
| 2006-01-30 | 336-740 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | GREENSBORO | NC |
| 2006-01-27 | 517-968 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DANSVILLE | MI |
| 2006-01-19 | 678-635 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | MONROE | GA |
| 2006-01-13 | 631-596 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | QUOGUE | NY |
| 2006-01-13 | 631-616 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | PECONIC | NY |
| 2006-01-13 | 914-401 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | KATONAH | NY |
| 2006-01-11 | 507-486 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | BYRON | MN |
| 2006-01-09 | 330-748 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | NORTHFIELD | OH |
| 2005-12-29 | 308-455 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KEARNEY | NE |
| 2005-12-12 | 205-544 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | JASPER | AL |
| 2005-12-01 | 805-863 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANTAMARIA | CA |
| 2005-11-29 | 317-855 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | OAKLANDON | IN |
| 2005-11-29 | 714-929 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SANTA ANA | CA |
| 2005-11-21 | 480-240 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2005-11-14 | 732-612 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MANASQUAN | NJ |
| 2005-10-20 | 909-634 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | POMONA | CA |
| 2005-10-17 | 517-600 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DIMONDALE | MI |
| 2005-10-13 | 909-694 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | UPLAND | CA |
| 2005-10-11 | 801-704 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPRINGVL | UT |
| 2005-10-03 | 909-653 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLTON | CA |
| 2005-10-03 | 909-907 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HIGHLAND | CA |
| 2005-09-30 | 909-922 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ETIWANDA | CA |
| 2005-09-30 | 916-647 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ELK GROVE | CA |
| 2005-09-29 | 310-425 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CULVERCITY | CA |
| 2005-09-27 | 561-771 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | PAHOKEE | FL |
| 2005-09-23 | 224-330 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | NORTHBROOK | IL |
| 2005-09-22 | 248-714 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MILFDWH LK | MI |
| 2005-09-22 | 814-412 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SAEGERTOWN | PA |
| 2005-09-22 | 814-510 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CONNEAUTLK | PA |
| 2005-09-15 | 517-222 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DANSVILLE | MI |
| 2005-09-12 | 480-522 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2005-09-07 | 805-769 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PASOROBLES | CA |
| 2005-09-03 | 305-847 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | HOMESTEAD | FL |
| 2005-08-16 | 831-718 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MONTEREY | CA |
| 2005-08-09 | 702-448 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAS VEGAS | NV |
| 2005-07-13 | 517-876 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | HOLT | MI |
| 2005-06-22 | 910-505 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | ABERDEEN | NC |
| 2005-06-19 | 951-880 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RIVERSIDE | CA |
| 2005-06-15 | 850-840 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MOLINO | FL |
| 2005-06-15 | 919-980 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | FOUR OAKS | NC |
| 2005-06-13 | 276-484 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7299 | WYTHEVILLE | VA |
| 2005-06-01 | 712-584 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPENCER | IA |
| 2005-05-31 | 573-303 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | COLUMBIA | MO |
| 2005-05-20 | 217-713 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | TAYLORVL | IL |
| 2005-05-20 | 217-929 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | MATTOON | IL |
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.