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 |
|---|---|---|---|---|---|
| 2010-11-19 | 424-267 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SAN PEDRO | CA |
| 2010-11-19 | 719-629 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLORDOSPG | CO |
| 2010-11-19 | 719-772 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLORDOSPG | CO |
| 2010-11-19 | 720-522 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2010-11-19 | 909-293 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CLAREMONT | CA |
| 2010-11-19 | 949-407 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | IRVINE | CA |
| 2010-11-19 | 951-298 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CORONA | CA |
| 2010-11-19 | 951-299 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ARLINGTON | CA |
| 2010-11-10 | 717-553 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LANCASTER | PA |
| 2010-11-09 | 732-374 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEWBRNSWCK | NJ |
| 2010-11-09 | 732-436 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAKEWOOD | NJ |
| 2010-11-09 | 732-994 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAKEWOOD | NJ |
| 2010-11-03 | 201-561 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HACKENSACK | NJ |
| 2010-10-28 | 786-524 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | NORTH DADE | FL |
| 2010-10-21 | 904-800 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | JACKSONVL | FL |
| 2010-10-21 | 954-400 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | FTLAUDERDL | FL |
| 2010-10-14 | 720-686 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2010-10-13 | 786-441 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | MIAMI | FL |
| 2010-09-28 | 302-585 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOCKESSIN | DE |
| 2010-09-28 | 702-687 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAUGHLIN | NV |
| 2010-09-28 | 702-861 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAUGHLIN | NV |
| 2010-09-27 | 302-400 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEW CASTLE | DE |
| 2010-09-27 | 302-499 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DELAWARECY | DE |
| 2010-09-24 | 702-512 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | JEAN | NV |
| 2010-09-24 | 702-852 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAS VEGAS | NV |
| 2010-09-24 | 702-915 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAS VEGAS | NV |
| 2010-09-21 | 240-402 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNG236Z13 | MD |
| 2010-09-15 | 872-888 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN02 | IL |
| 2010-09-10 | 702-519 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAUGHLIN | NV |
| 2010-09-10 | 702-536 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAS VEGAS | NV |
| 2010-09-10 | 702-674 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | JEAN | NV |
| 2010-08-31 | 302-408 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOLLY OAK | DE |
| 2010-08-31 | 302-414 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEW CASTLE | DE |
| 2010-08-31 | 302-597 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DELAWARECY | DE |
| 2010-08-30 | 302-583 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DELAWARECY | DE |
| 2010-08-25 | 702-621 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | JEAN | NV |
| 2010-08-25 | 702-627 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAS VEGAS | NV |
| 2010-08-20 | 312-999 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL |
| 2010-08-13 | 724-786 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FREEPORT | PA |
| 2010-08-10 | 408-915 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CAMPBELL | CA |
| 2010-08-03 | 408-753 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNJS WEST | CA |
| 2010-06-18 | 480-336 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2010-06-16 | 210-526 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2010-05-11 | 817-363 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FORT WORTH | TX |
| 2010-05-11 | 832-749 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOUSTON | TX |
| 2010-05-06 | 657-205 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SANTA ANA | CA |
| 2010-04-26 | 606-554 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | VIRGIE | KY |
| 2010-04-16 | 801-935 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SALT LAKE | UT |
| 2010-04-02 | 720-509 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2010-04-01 | 214-937 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRISCO | TX |
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.