NumberResearchRecent thousands-block assignments
7 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 628
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 |
|---|---|---|---|---|---|---|---|
| 2023-08-29 | 628-278-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | SNFC MT-EV | CA |
| 2023-08-29 | 628-283-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | SNFC MT-EV | CA |
| 2023-08-09 | 628-292-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | BELVEDERE | CA |
| 2023-08-09 | 628-292-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | BELVEDERE | CA |
| 2023-08-09 | 628-292-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | BELVEDERE | CA |
| 2023-08-09 | 628-292-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | BELVEDERE | CA |
| 2023-08-09 | 628-292-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | BELVEDERE | CA |
| 2023-08-09 | 628-293-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | NICASIO | CA |
| 2023-08-09 | 628-293-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | NICASIO | CA |
| 2023-08-09 | 628-293-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | NICASIO | CA |
| 2023-08-09 | 628-293-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | NICASIO | CA |
| 2023-08-09 | 628-293-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | NICASIO | CA |
| 2023-08-04 | 628-291-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MILLVALLEY | CA |
| 2023-08-02 | 628-285-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SAN RAFAEL | CA |
| 2023-08-02 | 628-842-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORTEMADRA | CA |
| 2023-07-13 | 628-290-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNFC JUNPR | CA |
| 2023-07-13 | 628-290-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | SNFC JUNPR | CA |
| 2023-07-13 | 628-290-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SNFC JUNPR | CA |
| 2023-07-12 | 628-278-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SNFC MT-EV | CA |
| 2023-07-12 | 628-283-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | SNFC MT-EV | CA |
| 2023-07-12 | 628-399-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | SNFC MT-EV | CA |
| 2023-07-12 | 628-477-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | MILLVALLEY | CA |
| 2023-07-12 | 628-677-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | MILLVALLEY | CA |
| 2023-07-12 | 628-677-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | MILLVALLEY | CA |
| 2023-07-12 | 628-677-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | MILLVALLEY | CA |
| 2023-05-31 | 628-282-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | SNFC JUNPR | CA |
| 2023-05-30 | 628-282-8XXX | 8000–8999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SNFC JUNPR | CA |
| 2023-05-26 | 628-289-0XXX | 0000–0999 | Assigned | FIVE9, INC. | 598J | SNFC CNTRL | CA |
| 2023-05-05 | 628-587-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | NOVATO | CA |
| 2023-05-02 | 628-587-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | NOVATO | CA |
| 2023-04-14 | 628-866-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BELVEDERE | CA |
| 2023-04-07 | 628-287-0XXX | 0000–0999 | Assigned | FIVE9, INC. | 598J | SNFC CNTRL | CA |
| 2023-02-22 | 628-281-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | SNFC CNTRL | CA |
| 2023-02-13 | 628-754-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC MT-EV | CA |
| 2023-02-13 | 628-754-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC MT-EV | CA |
| 2023-02-13 | 628-754-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC MT-EV | CA |
| 2023-02-13 | 628-754-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC MT-EV | CA |
| 2023-02-13 | 628-754-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC MT-EV | CA |
| 2023-02-13 | 628-754-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC MT-EV | CA |
| 2023-02-13 | 628-754-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC MT-EV | CA |
| 2023-02-13 | 628-754-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC MT-EV | CA |
| 2023-02-13 | 628-754-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC MT-EV | CA |
| 2023-02-13 | 628-754-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC MT-EV | CA |
| 2023-02-09 | 628-682-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NOVATO | CA |
| 2023-01-11 | 628-281-1XXX | 1000–1999 | Assigned | NUSO, LLC | 732J | SNFC CNTRL | CA |
| 2022-12-19 | 628-358-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNFC CNTRL | CA |
| 2022-12-19 | 628-626-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNFC CNTRL | CA |
| 2022-12-19 | 628-626-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNFC CNTRL | CA |
| 2022-11-29 | 628-388-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | INVERNESS | CA |
| 2022-11-15 | 628-282-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SNFC JUNPR | 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.