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 |
|---|---|---|---|---|---|
| 858-227 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOSANFE | CA | |
| 858-228 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-244 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-348 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA | |
| 858-352 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-362 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-366 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-373 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-408 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA | |
| 858-410 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-430 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-434 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOPNQTS | CA | |
| 858-609 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-703 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA | |
| 858-704 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA | |
| 858-712 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-716 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA | |
| 858-724 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA | |
| 858-726 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | POWAY | CA | |
| 858-731 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-737 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-753 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA | |
| 858-799 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA | |
| 858-836 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA | |
| 858-859 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | POWAY | CA | |
| 858-877 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA | |
| 858-879 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA | |
| 858-880 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA | |
| 858-901 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOPNQTS | CA | |
| 858-905 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOPNQTS | CA | |
| 858-935 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA | |
| 858-946 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA | |
| 909-451 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CLAREMONT | CA | |
| 909-610 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DIAMONDBAR | CA | |
| 909-618 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | POMONA | CA | |
| 916-356 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | FOLSOM | CA | |
| 916-377 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | FOLSOM | CA | |
| 916-384 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA | |
| 916-403 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA | |
| 916-414 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA | |
| 916-431 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA | |
| 916-526 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | FAIR OAKS | CA | |
| 916-576 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM NORTH | CA | |
| 916-605 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | FOLSOM | CA | |
| 925-255 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ORINDA | CA | |
| 925-298 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LAFAYETTE | CA | |
| 925-364 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DUBLN-SNRM | CA | |
| 925-557 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DUBLN-SNRM | CA | |
| 925-826 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CONCORD | CA | |
| 925-854 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DANVILLE | 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.