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 |
|---|---|---|---|---|---|
| 2026-03-17 | 505-673-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2019-02-15 | 505-372-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | SANTA FE | NM |
| 2019-02-15 | 505-372-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | SANTA FE | NM |
| 2018-07-27 | 505-208-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2016-11-10 | 575-205-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | TUCUMCARI | NM |
| 2016-11-07 | 505-313-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2016-11-07 | 505-365-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | SANTA FE | NM |
| 2016-01-29 | 505-355-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2016-01-29 | 575-659-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | LOVINGTON | NM |
| 2015-06-15 | 575-329-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | CANNON AFB | NM |
| 2015-01-23 | 505-485-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2014-12-12 | 505-793-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | FARMINGTON | NM |
| 2014-10-27 | 575-288-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | LAS CRUCES | NM |
| 2013-11-26 | 575-383-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | RATON | NM |
| 2013-09-09 | 505-219-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2013-02-11 | 575-468-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | PORTALES | NM |
| 2013-02-05 | 505-886-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2011-12-01 | 575-936-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | DEMING | NM |
| 2011-11-04 | 505-200-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2011-08-05 | 505-490-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | SANTA FE | NM |
| 2011-07-12 | 575-502-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | SNA TERESA | NM |
| 2011-02-10 | 505-652-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | LAS VEGAS | NM |
| 2010-06-29 | 575-519-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | SILVERCITY | NM |
| 2010-06-29 | 575-616-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ARTESIA | NM |
| 2010-01-26 | 575-201-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ANTHONY | NM |
| 2009-08-26 | 505-658-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | GRANTS | NM |
| 2009-02-23 | 505-717-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2007-11-21 | 575-322-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | SOCORRO | NM |
| 2007-10-09 | 575-741-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | TAOS | NM |
| 2007-03-22 | 505-634-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | AZTEC | NM |
| 2007-03-22 | 505-807-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2007-03-22 | 575-219-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | CLOVIS | NM |
| 2006-10-31 | 505-407-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2006-10-31 | 505-608-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | FARMINGTON | NM |
| 2006-10-31 | 505-862-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | GALLUP | NM |
| 2006-10-31 | 505-966-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2006-10-31 | 575-208-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ROSWELL | NM |
| 2006-10-31 | 575-551-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALAMOGORDO | NM |
| 2006-10-31 | 575-680-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | LAS CRUCES | NM |
| 2006-02-20 | 505-353-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2006-02-20 | 505-816-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2006-02-20 | 505-818-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2006-02-20 | 505-944-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2004-11-24 | 505-404-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | ALBUQURQUE | NM |
| 2003-05-14 | 505-428-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | SANTA FE | NM |
| 2003-04-16 | 505-663-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | LOS ALAMOS | NM |
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.