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
New assignments by month
Sep 2026
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2008-05-02 | 916-993 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM NORTH | CA |
| 2008-03-21 | 325-267 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ABILENE | TX |
| 2008-03-21 | 806-318 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AMARILLO | TX |
| 2008-03-21 | 806-319 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LUBBOCK | TX |
| 2008-03-21 | 940-249 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WICHITAFLS | TX |
| 2008-03-04 | 304-979 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRIDGEPORT | WV |
| 2008-02-19 | 304-207 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BECKLEY | WV |
| 2008-01-31 | 980-225 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | CHARLOTTE | NC |
| 2008-01-18 | 774-441 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WORCESTER | MA |
| 2008-01-18 | 774-442 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WORCESTER | MA |
| 2008-01-18 | 774-443 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WORCESTER | MA |
| 2007-12-21 | 845-580 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | PIERMONT | NY |
| 2007-12-17 | 573-658 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | JEFFERSNCY | MO |
| 2007-11-29 | 832-337 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2007-11-28 | 440-695 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | AVON | OH |
| 2007-11-28 | 618-606 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | COLLINSVL | IL |
| 2007-11-27 | 713-258 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOUSTON | TX |
| 2007-10-23 | 540-733 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | EDOM | VA |
| 2007-10-17 | 857-318 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BOSTON | MA |
| 2007-08-29 | 845-584 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | CONGERS | NY |
| 2007-08-22 | 713-323 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2007-07-06 | 832-209 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOUSTON | TX |
| 2007-05-11 | 646-454 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN01 | NY |
| 2007-05-07 | 615-932 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2007-05-07 | 714-829 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ANAHEIM | CA |
| 2007-04-22 | 424-226 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AVALON | CA |
| 2007-04-22 | 909-245 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CRESTLINE | CA |
| 2007-04-22 | 951-226 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ELSINORE | CA |
| 2007-04-19 | 347-648 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN08 | NY |
| 2007-04-18 | 516-308 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN09 | NY |
| 2007-04-13 | 402-875 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LINCOLN | NE |
| 2007-04-03 | 609-365 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | SOMERS PT | NJ |
| 2007-03-28 | 208-546 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID | 678B | NAMPA | ID |
| 2007-03-28 | 678-975 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | WINDER | GA |
| 2007-03-08 | 706-944 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ROSSVILLE | GA |
| 2007-02-21 | 330-840 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | TWINSBURG | OH |
| 2007-02-15 | 650-214 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MT VIEW | CA |
| 2007-02-14 | 865-248 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | KINGSTON | TN |
| 2007-02-13 | 575-964 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | HOBBS | NM |
| 2007-02-08 | 304-707 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARTINSBG | WV |
| 2007-02-08 | 314-735 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | ST LOUIS | MO |
| 2007-02-06 | 210-327 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2007-01-25 | 201-942 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | JERSEYCITY | NJ |
| 2007-01-13 | 951-468 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | IDYLLWILD | CA |
| 2007-01-10 | 337-548 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAKEARTHUR | LA |
| 2007-01-03 | 609-225 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | ATLNTIC CY | NJ |
| 2007-01-03 | 856-213 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | VINELAND | NJ |
| 2006-12-27 | 650-427 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | PALO ALTO | CA |
| 2006-12-01 | 702-789 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV | 9145 | LAS VEGAS | NV |
| 2006-11-30 | 424-203 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOMITA | CA |
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.