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 |
|---|---|---|---|---|---|
| 2004-07-28 | 757-201 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | NRFOLKZON2 | VA |
| 2004-07-27 | 406-371 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BILLINGS | MT |
| 2004-07-27 | 406-437 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HELENA | MT |
| 2004-07-27 | 701-552 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FARGO | ND |
| 2004-07-21 | 614-360 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7836 | COLUMBUS | OH |
| 2004-07-21 | 937-401 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7836 | DAYTON | OH |
| 2004-07-20 | 701-557 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BISMARCK | ND |
| 2004-07-19 | 203-620 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | DARIEN | CT |
| 2004-07-19 | 203-827 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | OLDGRNWICH | CT |
| 2004-07-19 | 570-335 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | SCRANTON | PA |
| 2004-07-19 | 814-201 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | ALTOONA | PA |
| 2004-07-14 | 307-274 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHEYENNE | WY |
| 2004-07-14 | 319-213 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CEDAR RPDS | IA |
| 2004-07-14 | 320-345 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | ST CLOUD | MN |
| 2004-07-14 | 515-418 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DES MOINES | IA |
| 2004-07-14 | 563-209 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DAVENPORT | IA |
| 2004-07-14 | 605-553 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SIOUX FLS | SD |
| 2004-07-14 | 712-212 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SIOUX CITY | IA |
| 2004-07-07 | 904-216 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | JACKSONVL | FL |
| 2004-07-01 | 352-270 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BEVERLYHLS | FL |
| 2004-07-01 | 916-293 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FOLSOM | CA |
| 2004-06-28 | 815-517 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | DE KALB | IL |
| 2004-06-23 | 715-301 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WAUSAU | WI |
| 2004-06-23 | 813-200 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TAMPA | FL |
| 2004-06-22 | 302-288 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WILMINGTON | DE |
| 2004-06-17 | 309-319 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | BLOOMINGTN | IL |
| 2004-06-10 | 763-322 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TWINCITIES | MN |
| 2004-06-10 | 763-431 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TWINCITIES | MN |
| 2004-06-09 | 910-516 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | CHADBOURN | NC |
| 2004-06-07 | 302-338 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEWARK | DE |
| 2004-06-07 | 302-340 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DELAWARECY | DE |
| 2004-06-07 | 302-341 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEWARK | DE |
| 2004-06-07 | 302-361 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOCKESSIN | DE |
| 2004-06-07 | 302-370 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEW CASTLE | DE |
| 2004-06-07 | 302-371 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOLLY OAK | DE |
| 2004-06-07 | 302-372 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOCKESSIN | DE |
| 2004-06-07 | 302-374 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOLLY OAK | DE |
| 2004-06-07 | 302-380 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DELAWARECY | DE |
| 2004-06-07 | 719-244 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLORDOSPG | CO |
| 2004-06-04 | 817-549 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ARLINGTON | TX |
| 2004-06-04 | 817-582 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ATLAS | TX |
| 2004-06-02 | 507-226 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | ROCHESTER | MN |
| 2004-06-01 | 308-392 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GRAND IS | NE |
| 2004-05-28 | 402-715 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OMAHA | NE |
| 2004-05-27 | 410-200 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | EASTON | MD |
| 2004-05-24 | 484-906 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHPHSBZN21 | PA |
| 2004-05-20 | 720-247 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2004-05-20 | 740-931 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | CHESHIRCTR | OH |
| 2004-05-20 | 910-557 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | HAMLET | NC |
| 2004-05-18 | 910-319 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | SCOTTSHILL | NC |
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.