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
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Block | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2012-09-17 | 925-529-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ANTIOCH | CA |
| 2012-09-17 | 925-983-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BSHP RNCH | CA |
| 2012-08-31 | 949-238-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SADLBK VLY | CA |
| 2012-08-30 | 657-529-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BUENA PARK | CA |
| 2012-08-24 | 760-742-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | PAUMA VLY | CA |
| 2012-06-26 | 619-810-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
| 2012-06-26 | 619-810-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
| 2012-06-26 | 619-810-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
| 2012-06-05 | 925-965-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | PLEASANTON | CA |
| 2012-05-24 | 408-606-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2012-05-24 | 916-228-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2012-05-24 | 916-228-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2012-05-16 | 619-810-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
| 2012-04-18 | 408-606-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2012-04-04 | 949-238-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SADLBK VLY | CA |
| 2012-03-28 | 530-572-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | YREKA | CA |
| 2012-03-01 | 951-331-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | TEMECULA | CA |
| 2012-02-14 | 562-263-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NORWALK | CA |
| 2012-02-13 | 925-293-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MARTINEZ | CA |
| 2012-02-02 | 831-705-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CHUALAR | CA |
| 2012-02-02 | 916-629-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | MEADOWVIEW | CA |
| 2012-01-04 | 657-235-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SANTA ANA | CA |
| 2012-01-04 | 925-350-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ANTIOCH | CA |
| 2011-12-30 | 925-298-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LAFAYETTE | CA |
| 2011-12-30 | 925-357-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | WALNUT CRK | CA |
| 2011-12-30 | 925-364-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DUBLN-SNRM | CA |
| 2011-12-30 | 925-524-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CLAYTON | CA |
| 2011-12-16 | 951-916-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LAKEVIEWNU | CA |
| 2011-12-05 | 760-607-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OCSD CRLS | CA |
| 2011-12-05 | 760-853-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | YUCCA VLY | CA |
| 2011-11-29 | 760-623-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BRAWLEY | CA |
| 2011-11-22 | 949-238-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SADLBK VLY | CA |
| 2011-11-21 | 530-378-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | ANDERSON | CA |
| 2011-11-21 | 916-302-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | PLEASATGRV | CA |
| 2011-11-01 | 562-566-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | PICORIVERA | CA |
| 2011-11-01 | 925-255-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ORINDA | CA |
| 2011-11-01 | 925-273-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LIVERMORE | CA |
| 2011-11-01 | 925-854-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DANVILLE | CA |
| 2011-11-01 | 949-356-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SADLBK VLY | CA |
| 2011-11-01 | 951-373-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ARLINGTON | CA |
| 2011-10-28 | 831-293-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CARMEL | CA |
| 2011-10-27 | 925-334-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CONCORD | CA |
| 2011-09-30 | 408-343-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2011-09-30 | 408-501-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2011-09-28 | 916-999-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM NORTH | CA |
| 2011-09-22 | 760-545-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IMPERIAL | CA |
| 2011-09-13 | 408-620-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS SOUTH | CA |
| 2011-09-02 | 925-293-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MARTINEZ | CA |
| 2011-09-02 | 925-298-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LAFAYETTE | CA |
| 2011-09-02 | 925-529-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ANTIOCH | 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.