NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/18/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time
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Sep 2026
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| Assigned | Block | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2014-09-22 | 707-690-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NAPA | CA |
| 2014-09-19 | 760-894-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DSERTHTSPG | CA |
| 2014-09-16 | 650-429-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MT VIEW | CA |
| 2014-08-11 | 619-494-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CHULAVISTA | CA |
| 2014-08-05 | 213-296-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 10 | CA |
| 2014-07-30 | 209-857-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | MODESTO | CA |
| 2014-07-30 | 916-970-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2014-07-08 | 669-234-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS SOUTH | CA |
| 2014-06-24 | 424-610-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNMN SNMN | CA |
| 2014-06-24 | 760-977-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RIDGECREST | CA |
| 2014-06-23 | 707-617-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | FORTUNA | CA |
| 2014-06-17 | 442-246-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MORONGOVLY | CA |
| 2014-06-17 | 442-321-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HOMESTDVLY | CA |
| 2014-06-11 | 925-983-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BSHP RNCH | CA |
| 2014-05-21 | 951-435-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | PERRIS | CA |
| 2014-05-16 | 669-500-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | GILROY | CA |
| 2014-05-16 | 951-388-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HEMT HMLD | CA |
| 2014-04-22 | 831-291-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SANTA CRUZ | CA |
| 2014-04-21 | 530-784-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | WEAVERVL | CA |
| 2014-04-18 | 669-233-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LOS GATOS | CA |
| 2014-04-18 | 669-342-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2014-04-07 | 951-332-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MIRA LOMA | CA |
| 2014-04-07 | 951-384-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RIVERSIDE | CA |
| 2014-04-01 | 916-696-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM NORTH | CA |
| 2014-03-24 | 916-330-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2014-03-24 | 925-278-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | WALNUT CRK | CA |
| 2014-03-24 | 949-431-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2014-03-07 | 951-902-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MORENO | CA |
| 2014-03-04 | 323-741-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 02 | CA |
| 2014-02-04 | 424-334-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | AVALON | CA |
| 2014-02-04 | 530-349-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | COLFAX | CA |
| 2014-02-03 | 424-332-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BEVERLYHLS | CA |
| 2014-01-31 | 707-764-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RIO DELL | CA |
| 2014-01-24 | 916-585-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | ELK GROVE | CA |
| 2014-01-14 | 925-316-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MARTINEZ | CA |
| 2013-12-20 | 760-549-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LKISABELLA | CA |
| 2013-12-20 | 760-640-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BLYTHE | CA |
| 2013-12-20 | 909-351-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MENTONE | CA |
| 2013-12-06 | 209-890-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | ANGELSCAMP | CA |
| 2013-12-06 | 530-500-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | DUNSMUIR | CA |
| 2013-12-06 | 530-657-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | WEED | CA |
| 2013-12-06 | 530-900-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | CORNING | CA |
| 2013-12-06 | 530-988-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | ORLAND | CA |
| 2013-12-04 | 951-393-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CORONA | CA |
| 2013-12-04 | 951-393-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CORONA | CA |
| 2013-12-04 | 951-393-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CORONA | CA |
| 2013-11-26 | 209-591-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SNRA MAIN | CA |
| 2013-11-25 | 530-594-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | GRIDLEY | CA |
| 2013-11-22 | 415-805-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNFC CNTRL | CA |
| 2013-11-21 | 619-566-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HARBSNALPN | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.