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 |
|---|---|---|---|---|---|---|---|
| 2006-02-15 | 435-773-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2006-02-08 | 435-621-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VERNAL | UT |
| 2006-01-23 | 435-215-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ST GEORGE | UT |
| 2006-01-09 | 435-239-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | BRIGHAM CY | UT |
| 2005-12-20 | 435-249-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | TOOELE | UT |
| 2005-12-07 | 435-232-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | LOGAN | UT |
| 2005-12-06 | 435-215-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ST GEORGE | UT |
| 2005-12-02 | 435-705-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | ST GEORGE | UT |
| 2005-11-29 | 435-554-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | LOGAN | UT |
| 2005-11-11 | 435-503-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | HEBER CITY | UT |
| 2005-10-14 | 435-237-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | BRIGHAM CY | UT |
| 2005-10-14 | 435-241-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | TOOELE | UT |
| 2005-10-10 | 435-659-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | PARK CITY | UT |
| 2005-10-10 | 435-669-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2005-10-10 | 435-773-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2005-09-16 | 435-213-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LOGAN | UT |
| 2005-09-15 | 435-231-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ENTERPRISE | UT |
| 2005-09-15 | 435-760-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | LOGAN | UT |
| 2005-09-14 | 435-817-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ST GEORGE | UT |
| 2005-09-14 | 435-817-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ST GEORGE | UT |
| 2005-08-15 | 435-201-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | RICHFIELD | UT |
| 2005-08-15 | 435-216-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | ST GEORGE | UT |
| 2005-08-15 | 435-527-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | MONROE | UT |
| 2005-08-11 | 435-238-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | CEDAR CITY | UT |
| 2005-08-05 | 435-669-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2005-08-02 | 435-849-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TOOELE | UT |
| 2005-07-28 | 435-226-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRIGHAM CY | UT |
| 2005-07-28 | 435-226-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRIGHAM CY | UT |
| 2005-07-28 | 435-226-6XXX | 6000–6999 | Assigned | ONVOY, LLC - UT | 871E | BRIGHAM CY | UT |
| 2005-07-28 | 435-226-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRIGHAM CY | UT |
| 2005-07-21 | 435-884-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | TOOELE | UT |
| 2005-07-12 | 435-671-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | HEBER CITY | UT |
| 2005-07-05 | 435-621-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VERNAL | UT |
| 2005-06-20 | 435-215-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ST GEORGE | UT |
| 2005-06-08 | 435-228-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | TOOELE | UT |
| 2005-06-06 | 435-669-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2005-05-20 | 435-230-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | BEARRIV CY | UT |
| 2005-05-06 | 435-294-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | LOGAN | UT |
| 2005-05-06 | 435-294-2XXX | 2000–2999 | Assigned | ONVOY, LLC - UT | 871E | LOGAN | UT |
| 2005-05-05 | 435-232-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | LOGAN | UT |
| 2005-05-05 | 435-609-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASTLEDALE | UT |
| 2005-04-26 | 435-775-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | TOOELE | UT |
| 2005-04-22 | 435-201-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | RICHFIELD | UT |
| 2005-04-22 | 435-252-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | PARK CITY | UT |
| 2005-04-22 | 435-580-0XXX | 0000–0999 | Assigned | ONVOY, LLC - UT | 871E | NEPHI | UT |
| 2005-04-15 | 435-669-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2005-03-31 | 435-773-6XXX | 6000–6999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7176 | ST GEORGE | UT |
| 2005-03-15 | 435-215-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ST GEORGE | UT |
| 2005-03-15 | 435-215-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ST GEORGE | UT |
| 2005-03-15 | 435-773-4XXX | 4000–4999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7176 | ST GEORGE | 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.