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 |
|---|---|---|---|---|---|
| 2019-11-11 | 951-508 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CORONA | CA |
| 2018-12-12 | 213-409 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 01 | CA |
| 2018-10-30 | 424-426 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HAWTHORNE | CA |
| 2018-08-23 | 562-486 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LONG BEACH | CA |
| 2018-08-17 | 949-490 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2018-05-15 | 628-263 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNFC CNTRL | CA |
| 2018-04-05 | 510-955 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OKLD TRNID | CA |
| 2018-03-15 | 209-458 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | MODESTO | CA |
| 2018-01-26 | 424-419 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | INGLEWOOD | CA |
| 2018-01-12 | 424-559 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | W ANGELES | CA |
| 2017-12-26 | 925-499 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CONCORD | CA |
| 2017-12-12 | 916-309 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2017-09-12 | 650-379 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SSNFRNCSCO | CA |
| 2017-07-10 | 213-218 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 01 | CA |
| 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 |
| 2017-05-25 | 669-544 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS NORTH | CA |
| 2017-03-13 | 669-287 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2017-02-17 | 949-576 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2017-02-10 | 213-428 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 01 | CA |
| 2017-01-19 | 213-410 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 01 | CA |
| 2016-09-02 | 669-282 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CAMPBELL | CA |
| 2016-08-25 | 951-494 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IDYLLWILD | CA |
| 2016-06-01 | 424-388 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MALIBU | CA |
| 2016-05-27 | 442-286 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ESCONDIDO | CA |
| 2016-05-16 | 209-237 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | TRACY | CA |
| 2016-05-16 | 424-318 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | TORRANCE | CA |
| 2015-11-13 | 424-313 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BEVERLYHLS | CA |
| 2015-10-30 | 916-754 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2015-10-30 | 949-541 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LAGUNA BCH | CA |
| 2015-10-15 | 213-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 01 | CA |
| 2015-08-25 | 949-538 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CAPITRNVLY | CA |
| 2015-06-19 | 213-334 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 01 | CA |
| 2015-05-14 | 949-432 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NEWPORTBCH | CA |
| 2015-05-05 | 916-738 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2015-04-21 | 661-564 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | BKFD SOUTH | CA |
| 2015-04-10 | 424-359 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BEVERLYHLS | CA |
| 2015-02-12 | 424-301 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | EL SEGUNDO | CA |
| 2014-10-20 | 747-234 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BRBN BRBN | CA |
| 2014-09-22 | 707-690 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NAPA | CA |
| 2014-08-04 | 213-296 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 10 | CA |
| 2014-06-24 | 424-610 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNMN SNMN | CA |
| 2014-06-17 | 442-246 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MORONGOVLY | CA |
| 2014-06-17 | 442-321 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HOMESTDVLY | CA |
| 2014-03-21 | 949-431 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2014-03-04 | 323-741 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 02 | CA |
| 2013-12-04 | 951-393 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CORONA | CA |
| 2013-11-25 | 530-594 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | GRIDLEY | CA |
| 2013-11-22 | 415-805 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNFC CNTRL | CA |
| 2013-11-19 | 951-387 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MURRIETA | 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.