NumberResearchRecent thousands-block assignments
43 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 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 |
|---|---|---|---|---|---|---|---|
| 2022-03-16 | 435-341-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MONROE | UT |
| 2022-03-16 | 435-352-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | HEBER CITY | UT |
| 2022-03-16 | 435-567-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | RICHFIELD | UT |
| 2022-03-16 | 435-667-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BRIGHAM CY | UT |
| 2022-03-16 | 435-699-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | PARK CITY | UT |
| 2022-03-16 | 435-737-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | TOOELE | UT |
| 2022-03-16 | 435-868-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | CEDAR CITY | UT |
| 2022-03-14 | 435-737-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF UTAH, LLC - UT | 526H | TOOELE | UT |
| 2022-03-07 | 435-262-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | FAIRVIEW | UT |
| 2022-03-07 | 435-323-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | PARKVALLEY | UT |
| 2022-03-07 | 435-667-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | BRIGHAM CY | UT |
| 2022-03-04 | 435-746-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | KAMAS | UT |
| 2022-03-01 | 435-599-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | ST GEORGE | UT |
| 2022-02-28 | 435-567-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | RICHFIELD | UT |
| 2022-02-28 | 435-569-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | MOAB | UT |
| 2022-02-24 | 435-567-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | RICHFIELD | UT |
| 2022-02-24 | 435-569-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | MOAB | UT |
| 2022-02-22 | 435-284-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | KANOSH | UT |
| 2022-02-22 | 435-337-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | LAKEPOWELL | UT |
| 2022-02-22 | 435-422-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | HOWELL | UT |
| 2022-02-22 | 435-432-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | PROMONTORY | UT |
| 2022-02-22 | 435-626-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | SNOWVILLE | UT |
| 2022-02-22 | 435-733-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | DUCHESNE | UT |
| 2022-01-31 | 435-341-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | MONROE | UT |
| 2022-01-27 | 435-737-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | TOOELE | UT |
| 2022-01-27 | 435-746-4XXX | 4000–4999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | KAMAS | UT |
| 2022-01-26 | 435-610-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | NEPHI | UT |
| 2022-01-20 | 435-297-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | KAMAS | UT |
| 2022-01-20 | 435-297-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | KAMAS | UT |
| 2022-01-20 | 435-321-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | KAMAS | UT |
| 2022-01-20 | 435-321-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | KAMAS | UT |
| 2022-01-20 | 435-321-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | KAMAS | UT |
| 2022-01-20 | 435-321-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | KAMAS | UT |
| 2021-12-29 | 435-254-1XXX | 1000–1999 | Assigned | ONVOY, LLC - UT | 871E | PORTAGE | UT |
| 2021-12-29 | 435-254-7XXX | 7000–7999 | Assigned | ONVOY, LLC - UT | 871E | PORTAGE | UT |
| 2021-12-29 | 435-337-2XXX | 2000–2999 | Assigned | ONVOY, LLC - UT | 871E | LAKEPOWELL | UT |
| 2021-12-17 | 435-317-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | LOGAN | UT |
| 2021-12-13 | 435-264-8XXX | 8000–8999 | Assigned | ONVOY, LLC - UT | 871E | NAT BRIDGE | UT |
| 2021-12-13 | 435-266-1XXX | 1000–1999 | Assigned | ONVOY, LLC - UT | 871E | LYNNDYL | UT |
| 2021-12-13 | 435-266-8XXX | 8000–8999 | Assigned | ONVOY, LLC - UT | 871E | LYNNDYL | UT |
| 2021-12-13 | 435-269-3XXX | 3000–3999 | Assigned | ONVOY, LLC - UT | 871E | BLUFF | UT |
| 2021-12-13 | 435-732-2XXX | 2000–2999 | Assigned | ONVOY, LLC - UT | 871E | TREMONTON | UT |
| 2021-12-13 | 435-732-4XXX | 4000–4999 | Assigned | ONVOY, LLC - UT | 871E | TREMONTON | UT |
| 2021-12-13 | 435-732-8XXX | 8000–8999 | Assigned | ONVOY, LLC - UT | 871E | TREMONTON | UT |
| 2021-12-01 | 435-309-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF UTAH, LLC - UT | 526H | GLNCNYONCY | UT |
| 2021-11-24 | 435-270-4XXX | 4000–4999 | Assigned | E. FIBER SAN JUAN, LLC | 832J | BLANDING | UT |
| 2021-11-24 | 435-298-8XXX | 8000–8999 | Assigned | E. FIBER SAN JUAN, LLC | 832J | MONTICELLO | UT |
| 2021-11-23 | 435-269-0XXX | 0000–0999 | Assigned | E. FIBER SAN JUAN, LLC | 832J | BLUFF | UT |
| 2021-11-23 | 435-280-0XXX | 0000–0999 | Assigned | E. FIBER SAN JUAN, LLC | 832J | MEXICANHAT | UT |
| 2021-11-23 | 435-344-0XXX | 0000–0999 | Assigned | E. FIBER SAN JUAN, LLC | 832J | LA SAL | UT |
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.