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 |
|---|---|---|---|---|---|
| 2023-01-13 | 915-337 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | EL PASO | TX |
| 2023-01-11 | 771-221 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN1 | DC |
| 2023-01-10 | 804-653 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | RICHMOND | VA |
| 2022-12-05 | 582-228 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ERIE | PA |
| 2022-11-28 | 563-201 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DYERSVILLE | IA |
| 2022-10-24 | 945-278 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRISCO | TX |
| 2022-10-21 | 949-745 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | IRVINE | CA |
| 2022-09-28 | 448-210 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHIPLEY | FL |
| 2022-09-23 | 804-953 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | PETERSBURG | VA |
| 2022-09-02 | 848-334 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | METUCHEN | NJ |
| 2022-08-31 | 804-623 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | REEDVILLE | VA |
| 2022-08-30 | 771-215 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN1 | DC |
| 2022-08-12 | 680-244 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | SYRACUSE | NY |
| 2022-08-09 | 804-707 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | MIDLOTHIAN | VA |
| 2022-08-08 | 314-986 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | LADUE | MO |
| 2022-08-05 | 302-618 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEW CASTLE | DE |
| 2022-07-28 | 314-980 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | LADUE | MO |
| 2022-07-25 | 878-254 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTTSBGZON1 | PA |
| 2022-07-22 | 314-979 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | LADUE | MO |
| 2022-07-21 | 878-553 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTTSBGZON1 | PA |
| 2022-07-19 | 220-231 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7836 | JOHNSTOWN | OH |
| 2022-07-15 | 332-266 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2022-07-13 | 414-373 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MILWAUKZN1 | WI |
| 2022-07-08 | 771-214 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN1 | DC |
| 2022-06-22 | 808-771 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HONOLULU | HI |
| 2022-06-10 | 808-580 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HONOLULU | HI |
| 2022-05-11 | 774-523 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WEBSTER | MA |
| 2022-05-11 | 929-623 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN10 | NY |
| 2022-04-25 | 602-847 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2022-04-19 | 984-303 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | RALEIGH | NC |
| 2022-04-08 | 786-684 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | MIAMI | FL |
| 2022-03-25 | 480-863 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2022-02-23 | 864-665 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | SIMPSONVL | SC |
| 2022-02-14 | 253-354 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2022-02-10 | 747-318 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CANOGAPARK | CA |
| 2022-02-02 | 657-565 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANTA ANA | CA |
| 2022-01-19 | 774-506 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BROCKTON | MA |
| 2022-01-05 | 346-542 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOUSTON | TX |
| 2022-01-04 | 279-223 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM MAIN | CA |
| 2021-12-30 | 618-817 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | BELLEVILLE | IL |
| 2021-12-21 | 980-382 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | CHARLOTTE | NC |
| 2021-12-14 | 225-471 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA | 8764 | LUTCHER | LA |
| 2021-12-10 | 413-463 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPRINGFLD | MA |
| 2021-12-10 | 848-323 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | EATONTOWN | NJ |
| 2021-12-08 | 857-394 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BELMONT | MA |
| 2021-11-18 | 272-281 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TUNKHANNCK | PA |
| 2021-11-12 | 908-545 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LINDEN | NJ |
| 2021-11-08 | 607-446 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | CHENANGBDG | NY |
| 2021-11-05 | 332-455 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2021-10-11 | 202-240 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN1 | DC |
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.