NumberResearchRecent thousands-block assignments
35 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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, last 30 days — NPA 925
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 | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-12-14 | 925-849-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CONCORD | CA |
| 2006-12-14 | 925-849-6XXX | 6000–6999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CONCORD | CA |
| 2006-12-07 | 925-297-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LAFAYETTE | CA |
| 2006-11-22 | 925-978-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ANTIOCH | CA |
| 2006-11-16 | 925-498-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BSHP RNCH | CA |
| 2006-11-16 | 925-498-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BSHP RNCH | CA |
| 2006-11-16 | 925-956-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | WALNUT CRK | CA |
| 2006-11-10 | 925-303-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ANTIOCH | CA |
| 2006-10-19 | 925-387-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MARTINEZ | CA |
| 2006-10-19 | 925-470-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | ANTIOCH | CA |
| 2006-10-19 | 925-470-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | ANTIOCH | CA |
| 2006-10-19 | 925-470-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | ANTIOCH | CA |
| 2006-10-19 | 925-583-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LIVERMORE | CA |
| 2006-10-19 | 925-643-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PSBG WEST | CA |
| 2006-10-19 | 925-752-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | ANTIOCH | CA |
| 2006-10-19 | 925-752-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | ANTIOCH | CA |
| 2006-10-19 | 925-752-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | ANTIOCH | CA |
| 2006-10-11 | 925-271-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLEASANTON | CA |
| 2006-10-10 | 925-305-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | CONCORD | CA |
| 2006-10-10 | 925-305-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | CONCORD | CA |
| 2006-10-10 | 925-522-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ANTIOCH | CA |
| 2006-10-10 | 925-526-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PITTSBURG | CA |
| 2006-10-05 | 925-420-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | ECONTRCOST | CA |
| 2006-10-05 | 925-420-6XXX | 6000–6999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | ECONTRCOST | CA |
| 2006-09-27 | 925-755-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA |
| 2006-09-17 | 925-309-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | DANVILLE | CA |
| 2006-09-15 | 925-808-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CONCORD | CA |
| 2006-09-14 | 925-320-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MORAGA | CA |
| 2006-09-14 | 925-807-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BSHP RNCH | CA |
| 2006-09-14 | 925-913-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BSHP RNCH | CA |
| 2006-09-14 | 925-952-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WALNUT CRK | CA |
| 2006-09-14 | 925-956-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WALNUT CRK | CA |
| 2006-09-13 | 925-303-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ANTIOCH | CA |
| 2006-09-05 | 925-276-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CLAYTON | CA |
| 2006-09-05 | 925-482-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA |
| 2006-09-05 | 925-482-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA |
| 2006-09-05 | 925-524-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CLAYTON | CA |
| 2006-09-05 | 925-818-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA |
| 2006-09-05 | 925-948-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA |
| 2006-08-30 | 925-267-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | PITTSBURG | CA |
| 2006-08-30 | 925-291-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | PSBG WEST | CA |
| 2006-08-30 | 925-852-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | CONCORD | CA |
| 2006-08-30 | 925-956-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | WALNUT CRK | CA |
| 2006-08-15 | 925-626-3XXX | 3000–3999 | Assigned | PACIFIC BELL | 9740 | ECONTRCOST | CA |
| 2006-08-15 | 925-852-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | CONCORD | CA |
| 2006-08-10 | 925-878-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | LAFAYETTE | CA |
| 2006-08-09 | 925-252-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PITTSBURG | CA |
| 2006-08-09 | 925-269-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARTINEZ | CA |
| 2006-08-09 | 925-337-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LIVERMORE | CA |
| 2006-08-04 | 925-237-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ANTIOCH | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.