NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04
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 |
|---|---|---|---|---|---|
| 2004-05-13 | 352-668 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | FL |
| 2004-05-10 | 740-917 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | RATHBONE | OH |
| 2004-05-07 | 845-589 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | CONGERS | NY |
| 2004-05-04 | 901-234 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLLIERVL | TN |
| 2004-05-04 | 901-284 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ARLINGTON | TN |
| 2004-05-04 | 931-443 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | CLARKSVL | TN |
| 2004-05-03 | 720-265 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2004-04-30 | 302-347 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GEORGETOWN | DE |
| 2004-04-30 | 302-348 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GEORGETOWN | DE |
| 2004-04-30 | 720-368 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2004-04-27 | 650-253 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MT VIEW | CA |
| 2004-04-23 | 312-486 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL |
| 2004-04-09 | 612-241 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TWINCITIES | MN |
| 2004-04-08 | 303-496 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2004-04-08 | 646-216 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2004-04-07 | 214-481 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX |
| 2004-04-07 | 832-218 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOUSTON | TX |
| 2004-04-02 | 612-233 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TWINCITIES | MN |
| 2004-03-30 | 214-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX |
| 2004-03-30 | 832-383 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOUSTON | TX |
| 2004-03-26 | 208-272 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID | 678B | BOISE | ID |
| 2004-03-25 | 509-481 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPOKANE | WA |
| 2004-03-24 | 203-280 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | DARIEN | CT |
| 2004-03-23 | 717-395 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | HARISBGZN1 | PA |
| 2004-03-23 | 919-300 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | SMITHFIELD | NC |
| 2004-03-23 | 919-617 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | PRINCETON | NC |
| 2004-03-05 | 517-386 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | EATON RPD | MI |
| 2004-03-05 | 805-713 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEWBURYPRK | CA |
| 2004-03-01 | 903-280 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TEXARKANA | TX |
| 2004-02-20 | 203-920 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | NEW CANAAN | CT |
| 2004-02-20 | 203-955 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | FAIRFIELD | CT |
| 2004-02-20 | 203-986 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | OLDGRNWICH | CT |
| 2004-02-20 | 740-990 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | DELAWARE | OH |
| 2004-01-30 | 832-550 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOUSTON | TX |
| 2004-01-27 | 434-422 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | CHARLOTSVL | VA |
| 2004-01-16 | 432-288 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | TERMINAL | TX |
| 2004-01-13 | 870-559 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARION | AR |
| 2003-12-31 | 252-544 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | ROCKYMOUNT | NC |
| 2003-12-19 | 808-755 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LIHUE | HI |
| 2003-12-19 | 808-756 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HILO | HI |
| 2003-12-19 | 808-757 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WAILUKU | HI |
| 2003-12-16 | 423-202 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | JOHNSON CY | TN |
| 2003-12-10 | 910-665 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | WALLACE | NC |
| 2003-12-08 | 631-200 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | BAYPORT | NY |
| 2003-12-05 | 850-688 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TALLAHASSE | FL |
| 2003-11-18 | 870-727 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR | 7277 | PINE BLUFF | AR |
| 2003-11-13 | 208-277 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID | 678B | COERDALENE | ID |
| 2003-11-11 | 937-648 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7836 | DAYTON | OH |
| 2003-11-10 | 330-622 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | AKRON | OH |
| 2003-11-10 | 614-405 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7836 | COLUMBUS | OH |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.