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 |
|---|---|---|---|---|---|
| 2014-12-10 | 913-331 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS | 7593 | KANSASCITY | KS |
| 2014-12-10 | 913-332 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS | 7593 | KANSASCITY | KS |
| 2014-12-04 | 561-614 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | WPALMBEACH | FL |
| 2014-12-03 | 972-737 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ALLEN | TX |
| 2014-12-01 | 929-348 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN04 | NY |
| 2014-11-26 | 346-201 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HOUSTON | TX |
| 2014-11-24 | 785-646 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS | 7593 | TOPEKA | KS |
| 2014-11-24 | 910-598 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | FAYETTEVL | NC |
| 2014-11-24 | 910-771 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | FAYETTEVL | NC |
| 2014-11-20 | 312-792 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL |
| 2014-11-18 | 209-426 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LODI | CA |
| 2014-11-17 | 646-927 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2014-11-13 | 929-362 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN09 | NY |
| 2014-11-11 | 301-269 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN2 | MD |
| 2014-10-28 | 702-931 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV | 9145 | LAS VEGAS | NV |
| 2014-10-24 | 832-918 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HOUSTON | TX |
| 2014-10-20 | 747-234 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BRBN BRBN | CA |
| 2014-10-17 | 862-284 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SUCCASUNNA | NJ |
| 2014-10-03 | 469-779 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX |
| 2014-09-26 | 251-270 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FAIRHOPE | AL |
| 2014-09-22 | 707-690 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NAPA | CA |
| 2014-09-01 | 719-317 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLORDOSPG | CO |
| 2014-09-01 | 719-366 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLORDOSPG | CO |
| 2014-08-22 | 816-945 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7594 | KANSASCITY | MO |
| 2014-08-12 | 719-419 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLORDOSPG | CO |
| 2014-08-12 | 720-695 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2014-08-04 | 213-296 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 10 | CA |
| 2014-07-23 | 646-605 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2014-07-18 | 929-284 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN15 | NY |
| 2014-07-15 | 210-780 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2014-07-13 | 509-638 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPOKANE | WA |
| 2014-07-10 | 615-928 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2014-07-10 | 929-283 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN06 | NY |
| 2014-07-08 | 440-459 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | HILLCREST | OH |
| 2014-07-01 | 808-786 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HONOLULU | HI |
| 2014-07-01 | 808-787 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HONOLULU | HI |
| 2014-06-30 | 804-309 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | RICHMOND | VA |
| 2014-06-26 | 929-285 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN03 | NY |
| 2014-06-25 | 734-304 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | TRENTON | MI |
| 2014-06-24 | 424-610 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNMN SNMN | CA |
| 2014-06-20 | 703-457 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN08 | VA |
| 2014-06-20 | 802-544 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CONCORD | VT |
| 2014-06-19 | 808-789 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HONOLULU | HI |
| 2014-06-18 | 802-569 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BARTON | VT |
| 2014-06-18 | 802-830 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MONTPELIER | VT |
| 2014-06-17 | 442-246 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MORONGOVLY | CA |
| 2014-06-17 | 442-321 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HOMESTDVLY | CA |
| 2014-05-28 | 469-904 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX |
| 2014-05-08 | 612-815 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TWINCITIES | MN |
| 2014-05-05 | 224-347 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | ARLIGTNHTS | 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.