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 |
|---|---|---|---|---|---|
| 2017-12-26 | 925-499 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CONCORD | CA |
| 2017-12-21 | 531-216 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCHUYLER | NE |
| 2017-12-13 | 385-465 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SALT LAKE | UT |
| 2017-12-12 | 916-309 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2017-12-11 | 541-717 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BAKER | OR |
| 2017-11-08 | 480-501 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2017-11-07 | 331-237 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | NAPERVILLE | IL |
| 2017-11-06 | 267-827 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LANSDALE | PA |
| 2017-11-03 | 302-291 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - DE | 7220 | LEWES | DE |
| 2017-10-24 | 517-722 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | MASON | MI |
| 2017-10-18 | 346-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | SUGAR LAND | TX |
| 2017-10-10 | 929-458 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN03 | NY |
| 2017-09-28 | 878-439 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ROCHESTER | PA |
| 2017-09-18 | 361-223 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BENAVIDES | TX |
| 2017-09-18 | 571-362 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HERNDON | VA |
| 2017-09-14 | 219-245 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | WHEELER | IN |
| 2017-09-14 | 571-616 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ENGLESIDE | VA |
| 2017-09-12 | 650-379 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SSNFRNCSCO | CA |
| 2017-08-23 | 423-417 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | CHATTNOOGA | TN |
| 2017-08-11 | 571-515 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ENGLESIDE | VA |
| 2017-08-02 | 571-361 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MANASSAS | VA |
| 2017-08-02 | 984-287 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | DURHAM | NC |
| 2017-07-31 | 571-324 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HERNDON | VA |
| 2017-07-25 | 954-498 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | FTLAUDERDL | FL |
| 2017-07-20 | 539-218 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK | 7258 | MUSKOGEE | OK |
| 2017-07-10 | 213-218 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 01 | CA |
| 2017-07-10 | 219-247 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | CEDAR LAKE | IN |
| 2017-07-10 | 316-339 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS | 7593 | GODDARD | KS |
| 2017-07-10 | 808-794 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HONOLULU | HI |
| 2017-07-07 | 219-244 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | LAKE STA | IN |
| 2017-06-20 | 470-322 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | ATLANTA | GA |
| 2017-06-16 | 628-218 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNFC CNTRL | CA |
| 2017-06-16 | 909-407 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CLAREMONT | CA |
| 2017-06-14 | 551-210 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DUMONT | NJ |
| 2017-06-13 | 405-450 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK | 7258 | HOLDENVL | OK |
| 2017-05-26 | 914-229 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | WSCHSTZN03 | NY |
| 2017-05-25 | 669-544 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS NORTH | CA |
| 2017-05-18 | 972-324 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRISCO | TX |
| 2017-05-16 | 774-344 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OXFORD | MA |
| 2017-05-15 | 267-768 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHLDLPHZN1 | PA |
| 2017-05-10 | 302-274 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WILMINGTON | DE |
| 2017-05-10 | 502-591 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GEORGETOWN | KY |
| 2017-05-10 | 606-323 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | INEZ | KY |
| 2017-04-28 | 312-319 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHICGOZN01 | IL |
| 2017-04-28 | 984-328 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | RALEIGH | NC |
| 2017-04-17 | 413-299 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | HATFIELD | MA |
| 2017-04-12 | 440-932 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | HILLCREST | OH |
| 2017-04-10 | 567-299 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7158 | COLDWATER | OH |
| 2017-04-03 | 720-631 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2017-03-28 | 929-452 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN03 | NY |
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.