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 |
|---|---|---|---|---|---|---|---|
| 2017-11-03 | 435-236-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2017-10-25 | 435-800-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | PARK CITY | UT |
| 2017-10-23 | 435-799-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LOGAN | UT |
| 2017-10-18 | 435-777-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | HEBER CITY | UT |
| 2017-10-10 | 435-236-3XXX | 3000–3999 | Assigned | ONVOY, LLC - UT | 871E | ST GEORGE | UT |
| 2017-09-28 | 435-314-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | EPHRAIM | UT |
| 2017-09-12 | 435-210-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | MOAB | UT |
| 2017-09-01 | 435-800-0XXX | 0000–0999 | Assigned | ONVOY, LLC - UT | 871E | PARK CITY | UT |
| 2017-09-01 | 435-800-8XXX | 8000–8999 | Assigned | ONVOY, LLC - UT | 871E | PARK CITY | UT |
| 2017-08-28 | 435-465-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | BRIGHAM CY | UT |
| 2017-08-28 | 435-465-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | BRIGHAM CY | UT |
| 2017-08-28 | 435-553-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | BRIGHAM CY | UT |
| 2017-08-28 | 435-695-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | BRIGHAM CY | UT |
| 2017-08-28 | 435-744-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | BRIGHAM CY | UT |
| 2017-08-15 | 435-999-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | LOGAN | UT |
| 2017-07-19 | 435-709-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | HEBER CITY | UT |
| 2017-07-10 | 435-236-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2017-07-10 | 435-236-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2017-07-10 | 435-236-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2017-07-03 | 435-704-5XXX | 5000–5999 | Assigned | FIRSTDIGITAL COMMUNICATIONS, LLC | 716D | CEDAR CITY | UT |
| 2017-06-21 | 435-222-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF UTAH, LLC - UT | 526H | HEBER CITY | UT |
| 2017-06-02 | 435-287-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | RICHFIELD | UT |
| 2017-06-02 | 435-310-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | BEAVER | UT |
| 2017-06-02 | 435-681-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | NEPHI | UT |
| 2017-05-23 | 435-222-3XXX | 3000–3999 | Assigned | ONVOY, LLC - UT | 871E | HEBER CITY | UT |
| 2017-05-23 | 435-294-3XXX | 3000–3999 | Assigned | ONVOY, LLC - UT | 871E | LOGAN | UT |
| 2017-05-22 | 435-236-2XXX | 2000–2999 | Assigned | ONVOY, LLC - UT | 871E | ST GEORGE | UT |
| 2017-05-05 | 435-604-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PARK CITY | UT |
| 2017-05-05 | 435-609-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASTLEDALE | UT |
| 2017-04-27 | 435-242-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GREENRIVER | UT |
| 2017-04-27 | 435-242-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GREENRIVER | UT |
| 2017-04-27 | 435-242-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GREENRIVER | UT |
| 2017-04-27 | 435-242-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GREENRIVER | UT |
| 2017-04-18 | 435-740-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | BRIGHAM CY | UT |
| 2017-03-30 | 435-222-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | HEBER CITY | UT |
| 2017-03-28 | 435-236-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | ST GEORGE | UT |
| 2017-03-28 | 435-252-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | PARK CITY | UT |
| 2017-03-28 | 435-268-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | TOOELE | UT |
| 2017-03-28 | 435-383-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | CEDAR CITY | UT |
| 2017-03-28 | 435-465-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | BRIGHAM CY | UT |
| 2017-03-02 | 435-268-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | TOOELE | UT |
| 2017-03-02 | 435-670-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SALINA | UT |
| 2017-03-01 | 435-222-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | HEBER CITY | UT |
| 2017-03-01 | 435-465-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BRIGHAM CY | UT |
| 2017-03-01 | 435-557-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LOGAN | UT |
| 2017-03-01 | 435-558-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | RICHFIELD | UT |
| 2017-03-01 | 435-677-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BRIAN HEAD | UT |
| 2017-03-01 | 435-710-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PAROWAN | UT |
| 2017-03-01 | 435-771-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MONROE | UT |
| 2017-03-01 | 435-777-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | HEBER 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.