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 |
|---|---|---|---|---|---|
| 2019-05-16 | 952-219 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TWINCITIES | MN |
| 2019-05-08 | 786-687 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | MIAMI | FL |
| 2019-04-12 | 207-690 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KITTERY | ME |
| 2019-04-02 | 909-712 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | REDLANDS | CA |
| 2019-03-27 | 681-289 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BLUEFIELD | WV |
| 2019-03-25 | 540-802 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MONTVALE | VA |
| 2019-03-22 | 667-265 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | VIENNA | MD |
| 2019-03-20 | 223-218 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | HENSEL | PA |
| 2019-03-20 | 223-219 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | RAWLINSVL | PA |
| 2019-03-13 | 856-508 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | PITMAN | NJ |
| 2019-03-05 | 914-369 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | WSCHSTZN01 | NY |
| 2019-03-04 | 707-316 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DIXON | CA |
| 2019-02-20 | 667-264 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | DELMAR | MD |
| 2019-02-19 | 276-242 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GRUNDY | VA |
| 2019-02-19 | 540-716 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEXINGTON | VA |
| 2019-02-19 | 682-289 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | EULESS | TX |
| 2019-02-19 | 929-514 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN08 | NY |
| 2019-02-19 | 970-552 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AKRON | CO |
| 2019-02-19 | 970-687 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GYPSUM | CO |
| 2019-02-19 | 970-838 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WALDEN | CO |
| 2019-02-15 | 314-547 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | LADUE | MO |
| 2019-02-15 | 417-418 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7594 | SPRINGFLD | MO |
| 2019-02-15 | 970-705 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | EAGLE | CO |
| 2019-02-15 | 970-706 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RANGELY | CO |
| 2019-02-14 | 505-372 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | SANTA FE | NM |
| 2019-02-08 | 281-505 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | KATY | TX |
| 2019-01-30 | 609-749 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | FORT DIX | NJ |
| 2019-01-18 | 646-994 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2019-01-10 | 504-380 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA | 8764 | NEWORLEANS | LA |
| 2019-01-08 | 470-520 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | ATLANTA | GA |
| 2018-12-21 | 667-259 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | REISTERSTN | MD |
| 2018-12-12 | 213-409 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 01 | CA |
| 2018-12-06 | 302-485 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WILMINGTON | DE |
| 2018-12-04 | 540-917 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BERRYVILLE | VA |
| 2018-11-20 | 206-833 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SEATTLE | WA |
| 2018-11-15 | 571-401 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HERNDON | VA |
| 2018-11-05 | 480-569 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2018-10-31 | 989-931 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | FARWELL | MI |
| 2018-10-30 | 424-426 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HAWTHORNE | CA |
| 2018-10-22 | 864-537 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | GREENVILLE | SC |
| 2018-10-19 | 682-278 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | EULESS | TX |
| 2018-10-18 | 346-372 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | SPRING | TX |
| 2018-10-17 | 458-355 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BEND | OR |
| 2018-10-16 | 239-264 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FORT MYERS | FL |
| 2018-10-15 | 971-355 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SALEM | OR |
| 2018-10-11 | 682-275 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | EULESS | TX |
| 2018-09-18 | 208-603 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID | 678B | SANDPOINT | ID |
| 2018-09-18 | 636-202 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | WARRENTON | MO |
| 2018-08-24 | 470-406 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | ATLANTA NE | GA |
| 2018-08-23 | 562-486 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LONG BEACH | 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.