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 |
|---|---|---|---|---|---|
| 2014-04-30 | 475-328 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | DARIEN | CT |
| 2014-04-28 | 631-637 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | BRENTWOOD | NY |
| 2014-04-28 | 646-828 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2014-04-28 | 929-275 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN07 | NY |
| 2014-04-24 | 832-823 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | SPRING | TX |
| 2014-04-22 | 470-434 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | BUFORD | GA |
| 2014-04-11 | 424-347 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOMITA | CA |
| 2014-04-04 | 929-281 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN04 | NY |
| 2014-04-04 | 929-324 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN06 | NY |
| 2014-04-03 | 210-774 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2014-03-31 | 480-739 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2014-03-31 | 816-599 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7594 | KANSASCITY | MO |
| 2014-03-28 | 774-843 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARLBORO | MA |
| 2014-03-26 | 980-221 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | CHARLOTTE | NC |
| 2014-03-25 | 224-352 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HALF DAY | IL |
| 2014-03-21 | 949-431 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2014-03-18 | 561-571 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | BOCA RATON | FL |
| 2014-03-12 | 720-418 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2014-03-10 | 585-449 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | BELMONT | NY |
| 2014-03-04 | 323-741 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 02 | CA |
| 2014-02-19 | 312-973 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL |
| 2014-02-07 | 646-767 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2014-02-06 | 541-843 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | JACKSONVL | OR |
| 2014-02-05 | 703-559 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN17 | VA |
| 2014-01-24 | 832-679 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2014-01-21 | 228-351 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MS | 4886 | GULFPORT | MS |
| 2014-01-21 | 601-882 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MS | 4886 | JACKSON | MS |
| 2014-01-13 | 202-753 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN1 | DC |
| 2014-01-13 | 631-652 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | SMITHTOWN | NY |
| 2014-01-13 | 929-265 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN03 | NY |
| 2014-01-08 | 234-262 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | NO CANTON | OH |
| 2014-01-08 | 720-450 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2013-12-26 | 515-346 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DES MOINES | IA |
| 2013-12-24 | 480-758 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2013-12-24 | 541-920 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OR | 7442 | VALE | OR |
| 2013-12-13 | 571-325 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HERNDON | VA |
| 2013-12-13 | 646-787 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2013-12-13 | 929-258 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN06 | NY |
| 2013-12-12 | 208-494 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GRANGEVL | ID |
| 2013-12-05 | 307-206 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LANDER | WY |
| 2013-12-04 | 951-393 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CORONA | CA |
| 2013-12-03 | 541-904 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SISTERS | OR |
| 2013-12-03 | 541-907 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAPINE | OR |
| 2013-12-03 | 970-296 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRUITA | CO |
| 2013-12-03 | 970-833 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WINDSOR | CO |
| 2013-12-03 | 971-314 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | VERNONIA | OR |
| 2013-12-02 | 210-762 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2013-11-27 | 234-701 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | SUGARCREEK | OH |
| 2013-11-27 | 567-603 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7158 | MINSTER | OH |
| 2013-11-26 | 606-530 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARTIN | KY |
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.