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.
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| Assigned | Block | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2011-08-30 | 415-299-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SAN RAFAEL | CA |
| 2011-08-11 | 951-335-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RIVERSIDE | CA |
| 2011-06-20 | 408-755-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2011-06-20 | 408-755-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2011-06-07 | 916-999-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM NORTH | CA |
| 2011-05-05 | 530-412-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | NTAH THCY | CA |
| 2011-04-28 | 916-900-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM NORTH | CA |
| 2011-04-26 | 949-988-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2011-04-26 | 949-988-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2011-04-22 | 209-330-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | WTFR MAIN | CA |
| 2011-03-21 | 949-427-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SADLBK VLY | CA |
| 2011-03-16 | 657-208-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ANAHEIM | CA |
| 2011-02-08 | 209-896-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | RIVERBANK | CA |
| 2011-01-31 | 916-403-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2011-01-31 | 916-403-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2011-01-19 | 925-627-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | WALNUT CRK | CA |
| 2011-01-14 | 858-999-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA |
| 2011-01-12 | 760-974-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | JOSHUATREE | CA |
| 2011-01-11 | 909-366-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BIGBEAR LK | CA |
| 2011-01-04 | 209-222-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | MODESTO | CA |
| 2010-12-28 | 925-331-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ANTIOCH | CA |
| 2010-12-23 | 916-945-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | RSVL MAIN | CA |
| 2010-12-08 | 760-890-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CALEXICO | CA |
| 2010-12-07 | 408-645-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2010-12-06 | 949-864-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2010-11-24 | 619-802-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NATIONALCY | CA |
| 2010-11-24 | 619-810-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
| 2010-11-22 | 562-567-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | WHITTIER | CA |
| 2010-11-22 | 619-607-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
| 2010-11-22 | 619-786-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
| 2010-11-10 | 209-253-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | RIPON | CA |
| 2010-11-09 | 949-864-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2010-11-08 | 619-824-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CAMPO | CA |
| 2010-11-05 | 951-777-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RIVERSIDE | CA |
| 2010-09-30 | 707-687-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | WINDSOR | CA |
| 2010-09-29 | 760-659-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | VISTA | CA |
| 2010-09-15 | 619-765-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NATIONALCY | CA |
| 2010-08-23 | 408-758-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2010-08-23 | 408-758-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2010-08-03 | 949-705-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2010-07-20 | 949-214-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2010-07-20 | 949-214-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IRVINE | CA |
| 2010-06-23 | 925-983-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BSHP RNCH | CA |
| 2010-05-17 | 949-505-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SADLBK VLY | CA |
| 2010-05-17 | 949-505-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SADLBK VLY | CA |
| 2010-05-11 | 760-576-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OCSD OCSD | CA |
| 2010-05-06 | 657-205-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SANTA ANA | CA |
| 2010-05-06 | 657-205-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SANTA ANA | CA |
| 2010-05-06 | 657-205-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SANTA ANA | CA |
| 2010-04-23 | 661-230-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | EDWARDS | 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.