NumberResearchRecent thousands-block assignments
25 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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 858
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 |
|---|---|---|---|---|---|---|---|
| 2015-02-25 | 858-239-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNDG MRMS | CA |
| 2015-02-18 | 858-261-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL MAR | CA |
| 2015-02-18 | 858-261-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL MAR | CA |
| 2015-02-16 | 858-253-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-02-16 | 858-253-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-02-16 | 858-253-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-02-16 | 858-253-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-02-16 | 858-253-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-02-16 | 858-253-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-02-16 | 858-253-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-02-16 | 858-253-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-02-16 | 858-253-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-02-16 | 858-253-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-01-26 | 858-239-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG MRMS | CA |
| 2015-01-23 | 858-239-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-01-23 | 858-239-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-01-23 | 858-239-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-01-23 | 858-239-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-01-23 | 858-239-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG MRMS | CA |
| 2015-01-23 | 858-247-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LA JOLLA | CA |
| 2015-01-23 | 858-247-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LA JOLLA | CA |
| 2015-01-23 | 858-247-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LA JOLLA | CA |
| 2015-01-23 | 858-252-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2015-01-23 | 858-252-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2015-01-23 | 858-252-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2015-01-23 | 858-252-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2015-01-23 | 858-252-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DEL MAR | CA |
| 2015-01-23 | 858-264-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2015-01-23 | 858-264-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2015-01-23 | 858-264-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNDG LVTA | CA |
| 2015-01-23 | 858-371-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2015-01-23 | 858-371-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2015-01-23 | 858-371-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2015-01-23 | 858-753-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOBRNDO | CA |
| 2015-01-19 | 858-832-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | RNCHOSANFE | CA |
| 2015-01-14 | 858-371-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | RNCHOPNQTS | CA |
| 2015-01-13 | 858-247-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LA JOLLA | CA |
| 2014-12-18 | 858-927-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | RNCHOBRNDO | CA |
| 2014-12-18 | 858-927-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | RNCHOBRNDO | CA |
| 2014-12-18 | 858-927-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | RNCHOBRNDO | CA |
| 2014-12-05 | 858-239-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2014-12-05 | 858-239-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2014-12-05 | 858-239-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | SNDG MRMS | CA |
| 2014-12-05 | 858-252-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEL MAR | CA |
| 2014-12-05 | 858-264-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2014-12-05 | 858-264-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2014-12-05 | 858-264-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNDG LVTA | CA |
| 2014-11-24 | 858-264-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2014-11-24 | 858-264-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
| 2014-11-24 | 858-264-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | SNDG LVTA | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.