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 |
|---|---|---|---|---|---|
| 2019-09-30 | 346-398 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HOUSTON | TX |
| 2019-02-08 | 281-505 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | KATY | TX |
| 2018-10-18 | 346-372 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | SPRING | TX |
| 2017-10-18 | 346-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | SUGAR LAND | TX |
| 2016-11-28 | 325-308 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | OZONA | TX |
| 2016-10-27 | 737-248 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | KYLE | TX |
| 2016-01-29 | 346-232 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HOUSTON | TX |
| 2015-11-24 | 737-843 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | LEANDER | TX |
| 2015-09-22 | 737-203 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | AUSTIN | TX |
| 2015-08-19 | 346-307 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | KATY | TX |
| 2015-07-07 | 737-484 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | AUSTIN | TX |
| 2015-01-26 | 346-216 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | BAYTOWN | TX |
| 2014-11-26 | 346-201 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HOUSTON | TX |
| 2014-10-24 | 832-918 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HOUSTON | TX |
| 2014-04-24 | 832-823 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | SPRING | TX |
| 2014-01-24 | 832-679 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2013-05-09 | 832-664 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2013-03-27 | 832-941 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HOUSTON | TX |
| 2013-03-04 | 832-787 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2012-11-16 | 512-952 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | AUSTIN | TX |
| 2012-06-14 | 512-813 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | AUSTIN | TX |
| 2012-04-02 | 832-619 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2012-02-07 | 512-605 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | AUSTIN | TX |
| 2011-06-22 | 512-362 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | AUSTIN | TX |
| 2008-09-17 | 254-284 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | ROGERS | TX |
| 2008-09-17 | 254-293 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | SALADO | TX |
| 2008-09-17 | 254-310 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | LITTLE RIV | TX |
| 2007-11-29 | 832-337 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2007-08-22 | 713-323 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2004-01-16 | 432-288 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | TERMINAL | TX |
| 2003-10-24 | 254-523 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | WACO | TX |
| 2003-07-24 | 325-340 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | SAN ANGELO | TX |
| 2003-07-24 | 979-599 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | BRYAN | TX |
| 281-366 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX | |
| 281-377 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | BAMMEL | TX | |
| 281-502 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HIGHLANDS | TX | |
| 281-504 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX | |
| 281-553 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | WESTFIELD | TX | |
| 281-607 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | MANVEL | TX | |
| 281-619 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX | |
| 281-667 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | APOLLO | TX | |
| 281-668 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX | |
| 281-670 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX | |
| 281-671 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | SATSUMA | TX | |
| 281-673 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | BAMMEL | TX | |
| 281-674 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX | |
| 281-676 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | BARKER | TX | |
| 281-677 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX | |
| 281-709 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | APOLLO | TX | |
| 281-710 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | ARCOLA | 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.