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 |
|---|---|---|---|---|---|
| 2011-08-22 | 571-383 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MANASSAS | VA |
| 2011-08-18 | 910-838 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | ROSEBORO | NC |
| 2011-08-17 | 252-323 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | LA GRANGE | NC |
| 2011-08-17 | 252-485 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | TRENTON | NC |
| 2011-08-17 | 252-486 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | HALIFAX | NC |
| 2011-08-17 | 252-629 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | LITTLETON | NC |
| 2011-08-16 | 210-306 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2011-08-12 | 410-622 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | BALTIMORE | MD |
| 2011-08-12 | 706-460 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | LAVONIA | GA |
| 2011-08-10 | 434-505 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DILLWYN | VA |
| 2011-07-29 | 803-299 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | COLUMBIA | SC |
| 2011-07-28 | 972-810 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CARROLLTON | TX |
| 2011-07-22 | 980-365 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | CHARLOTTE | NC |
| 2011-07-20 | 216-927 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | MONTRSE | OH |
| 2011-06-22 | 512-362 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | AUSTIN | TX |
| 2011-06-14 | 516-493 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN05 | NY |
| 2011-06-08 | 914-352 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | YORKTN HTS | NY |
| 2011-06-03 | 208-901 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID | 678B | BOISE | ID |
| 2011-06-02 | 702-690 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAS VEGAS | NV |
| 2011-06-01 | 202-594 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN1 | DC |
| 2011-06-01 | 443-475 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | BALTIMORE | MD |
| 2011-06-01 | 585-358 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | HENRIETTA | NY |
| 2011-05-16 | 443-289 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | WESTMINSTR | MD |
| 2011-03-29 | 443-741 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | COLUMBIA | MD |
| 2011-02-23 | 720-446 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2011-02-23 | 804-588 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | RICHMOND | VA |
| 2011-02-22 | 631-405 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | RIVERHEAD | NY |
| 2011-02-18 | 615-798 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | FRANKLIN | TN |
| 2011-02-16 | 202-827 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN1 | DC |
| 2011-02-15 | 480-499 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2011-01-28 | 470-202 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | BUFORD | GA |
| 2011-01-26 | 516-405 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN03 | NY |
| 2011-01-21 | 470-253 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | CUMMING | GA |
| 2011-01-12 | 520-477 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TUCSON | AZ |
| 2010-12-29 | 702-998 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV | 9145 | LAS VEGAS | NV |
| 2010-12-23 | 916-945 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | RSVL MAIN | CA |
| 2010-12-21 | 210-556 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2010-12-21 | 571-533 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN17 | VA |
| 2010-12-17 | 520-333 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TUCSON | AZ |
| 2010-12-16 | 971-200 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PORTLAND | OR |
| 2010-12-16 | 971-300 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PORTLAND | OR |
| 2010-12-14 | 405-757 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK | 7258 | EDMOND | OK |
| 2010-12-08 | 801-384 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SALT LAKE | UT |
| 2010-12-07 | 980-819 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | CHARLOTTE | NC |
| 2010-11-24 | 571-858 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN08 | VA |
| 2010-11-24 | 619-802 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NATIONALCY | CA |
| 2010-11-24 | 619-810 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
| 2010-11-24 | 818-664 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GLENDALE | CA |
| 2010-11-23 | 916-918 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RSVL MAIN | CA |
| 2010-11-19 | 323-398 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LSAN DA 03 | 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.