NumberResearchRecent thousands-block assignments
43 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 435
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 |
|---|---|---|---|---|---|---|---|
| 2023-02-10 | 435-350-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | COALVILLE | UT |
| 2023-02-10 | 435-350-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | COALVILLE | UT |
| 2023-02-10 | 435-350-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | COALVILLE | UT |
| 2023-02-10 | 435-350-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | COALVILLE | UT |
| 2023-02-03 | 435-282-2XXX | 2000–2999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | TREMONTON | UT |
| 2023-02-01 | 435-332-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HANKSVILLE | UT |
| 2023-02-01 | 435-342-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DNGLNG RPE | UT |
| 2023-02-01 | 435-343-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MANILA | UT |
| 2023-01-27 | 435-329-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BOULDER | UT |
| 2023-01-27 | 435-330-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CANNONVL | UT |
| 2023-01-27 | 435-331-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DUCK CREEK | UT |
| 2023-01-19 | 435-400-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | COALVILLE | UT |
| 2023-01-06 | 435-301-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ST GEORGE | UT |
| 2023-01-06 | 435-549-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VERNAL | UT |
| 2023-01-04 | 435-701-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | CEDAR CITY | UT |
| 2022-12-27 | 435-737-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | TOOELE | UT |
| 2022-12-15 | 435-309-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | GLNCNYONCY | UT |
| 2022-12-15 | 435-547-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | BRIAN HEAD | UT |
| 2022-12-15 | 435-737-5XXX | 5000–5999 | Assigned | ALL WEST/UTAH, INC. | 3881 | TOOELE | UT |
| 2022-12-08 | 435-317-6XXX | 6000–6999 | Assigned | ALL WEST/UTAH, INC. | 3881 | LOGAN | UT |
| 2022-12-08 | 435-317-7XXX | 7000–7999 | Assigned | ALL WEST/UTAH, INC. | 3881 | LOGAN | UT |
| 2022-11-30 | 435-549-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | VERNAL | UT |
| 2022-11-21 | 435-580-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | NEPHI | UT |
| 2022-11-21 | 435-866-7XXX | 7000–7999 | Assigned | ONVOY, LLC - UT | 871E | PORTAGE | UT |
| 2022-11-14 | 435-395-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | HEBER CITY | UT |
| 2022-10-19 | 435-266-0XXX | 0000–0999 | Assigned | ONVOY, LLC - UT | 871E | LYNNDYL | UT |
| 2022-10-19 | 435-266-9XXX | 9000–9999 | Assigned | ONVOY, LLC - UT | 871E | LYNNDYL | UT |
| 2022-10-19 | 435-352-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | HEBER CITY | UT |
| 2022-10-18 | 435-299-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PRICE | UT |
| 2022-10-10 | 435-254-9XXX | 9000–9999 | Assigned | ONVOY, LLC - UT | 871E | PORTAGE | UT |
| 2022-10-10 | 435-264-1XXX | 1000–1999 | Assigned | ONVOY, LLC - UT | 871E | NAT BRIDGE | UT |
| 2022-10-10 | 435-264-7XXX | 7000–7999 | Assigned | ONVOY, LLC - UT | 871E | NAT BRIDGE | UT |
| 2022-10-10 | 435-866-8XXX | 8000–8999 | Assigned | ONVOY, LLC - UT | 871E | PORTAGE | UT |
| 2022-10-07 | 435-400-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | COALVILLE | UT |
| 2022-10-04 | 435-278-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ENTERPRISE | UT |
| 2022-10-04 | 435-400-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | COALVILLE | UT |
| 2022-10-04 | 435-400-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | COALVILLE | UT |
| 2022-10-04 | 435-400-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | COALVILLE | UT |
| 2022-09-29 | 435-919-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BRIGHAM CY | UT |
| 2022-09-20 | 435-701-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | CEDAR CITY | UT |
| 2022-08-30 | 435-264-0XXX | 0000–0999 | Assigned | ONVOY, LLC - UT | 871E | NAT BRIDGE | UT |
| 2022-08-30 | 435-701-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | CEDAR CITY | UT |
| 2022-08-29 | 435-276-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | BLANDING | UT |
| 2022-08-22 | 435-600-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | PAROWAN | UT |
| 2022-08-18 | 435-314-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | EPHRAIM | UT |
| 2022-08-16 | 435-254-0XXX | 0000–0999 | Assigned | ONVOY, LLC - UT | 871E | PORTAGE | UT |
| 2022-08-10 | 435-567-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | RICHFIELD | UT |
| 2022-08-09 | 435-274-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | TOOELE | UT |
| 2022-08-05 | 435-534-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | LOGAN | UT |
| 2022-07-14 | 435-800-4XXX | 4000–4999 | Assigned | VONAGE AMERICA LLC | 197D | PARK CITY | UT |
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.