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
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Block | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2010-03-23 | 530-646-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | REDDING | CA |
| 2009-12-19 | 619-752-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
| 2009-12-19 | 619-752-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG SNDG | CA |
| 2009-12-07 | 619-761-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CHULAVISTA | CA |
| 2009-11-02 | 707-861-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SEBASTOPOL | CA |
| 2009-10-26 | 707-596-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SANTA ROSA | CA |
| 2009-10-21 | 408-337-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | GILROY | CA |
| 2009-10-08 | 916-585-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | ELK GROVE | CA |
| 2009-10-01 | 858-480-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA |
| 2009-09-08 | 831-263-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | KING CITY | CA |
| 2009-08-28 | 707-955-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HEALDSBURG | CA |
| 2009-08-14 | 747-224-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NORTHRIDGE | CA |
| 2009-06-08 | 650-316-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MT VIEW | CA |
| 2009-04-03 | 424-354-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BEVERLYHLS | CA |
| 2009-03-23 | 760-304-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SAN MARCOS | CA |
| 2009-03-23 | 760-884-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ESCONDIDO | CA |
| 2009-03-23 | 858-524-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOBRNDO | CA |
| 2009-03-23 | 858-939-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA |
| 2009-02-26 | 951-268-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CORONA | CA |
| 2009-01-29 | 916-865-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | RSVL MAIN | CA |
| 2009-01-26 | 619-655-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | EL CAJON | CA |
| 2009-01-22 | 760-687-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OCSD OCSD | CA |
| 2009-01-22 | 858-726-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | POWAY | CA |
| 2008-12-23 | 424-229-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNMN SNMN | CA |
| 2008-12-03 | 858-771-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOSANFE | CA |
| 2008-11-19 | 951-241-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RIVERSIDE | CA |
| 2008-11-17 | 858-630-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA |
| 2008-11-14 | 858-210-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA |
| 2008-11-14 | 858-461-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DEL MAR | CA |
| 2008-10-16 | 213-330-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 01 | CA |
| 2008-09-12 | 415-671-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNFC CNTRL | CA |
| 2008-09-12 | 415-671-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNFC CNTRL | CA |
| 2008-08-26 | 949-456-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CAPITRNVLY | CA |
| 2008-08-25 | 619-569-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | EL CAJON | CA |
| 2008-08-25 | 858-737-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG LVTA | CA |
| 2008-08-25 | 858-740-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNDG MRMS | CA |
| 2008-08-25 | 858-864-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LA JOLLA | CA |
| 2008-06-24 | 415-886-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CORTEMADRA | CA |
| 2008-06-23 | 408-796-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CAMPBELL | CA |
| 2008-06-23 | 415-779-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | STNSN-BLNS | CA |
| 2008-06-23 | 415-842-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | IGNACIO | CA |
| 2008-06-23 | 415-878-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NOVATO | CA |
| 2008-06-23 | 415-944-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SAUSALITO | CA |
| 2008-06-23 | 415-968-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | MILLVALLEY | CA |
| 2008-06-23 | 415-997-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NICASIO | CA |
| 2008-06-23 | 510-778-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RICHMOND | CA |
| 2008-06-23 | 510-803-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HRCUL-RODE | CA |
| 2008-06-23 | 510-964-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ELSBR-PINL | CA |
| 2008-06-23 | 650-713-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HALFMOONBY | CA |
| 2008-06-23 | 650-946-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LOS ALTOS | 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.