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 |
|---|---|---|---|---|---|---|---|
| 2006-09-13 | 435-659-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | PARK CITY | UT |
| 2006-09-13 | 435-773-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2006-09-13 | 435-890-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | LOGAN | UT |
| 2006-09-01 | 435-932-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | LOGAN | UT |
| 2006-08-31 | 435-213-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LOGAN | UT |
| 2006-08-31 | 435-231-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ENTERPRISE | UT |
| 2006-08-31 | 435-849-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TOOELE | UT |
| 2006-08-28 | 435-256-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ST GEORGE | UT |
| 2006-08-25 | 435-241-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | TOOELE | UT |
| 2006-08-23 | 435-256-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | ST GEORGE | UT |
| 2006-08-17 | 435-214-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PARK CITY | UT |
| 2006-08-17 | 435-214-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PARK CITY | UT |
| 2006-08-10 | 435-592-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | CEDAR CITY | UT |
| 2006-08-10 | 435-724-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ROOSEVELT | UT |
| 2006-08-02 | 435-251-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ST GEORGE | UT |
| 2006-07-17 | 435-213-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | LOGAN | UT |
| 2006-07-17 | 435-535-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | LOGAN | UT |
| 2006-07-17 | 435-554-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | LOGAN | UT |
| 2006-07-10 | 435-657-8XXX | 8000–8999 | Assigned | FIRSTDIGITAL TELECOM, LLC - UT | 5727 | HEBER CITY | UT |
| 2006-06-28 | 435-267-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | CEDAR CITY | UT |
| 2006-06-28 | 435-621-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VERNAL | UT |
| 2006-06-28 | 435-621-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VERNAL | UT |
| 2006-06-28 | 435-621-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VERNAL | UT |
| 2006-06-28 | 435-621-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VERNAL | UT |
| 2006-06-12 | 435-754-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LOGAN | UT |
| 2006-06-07 | 435-406-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | DELTA | UT |
| 2006-06-07 | 435-760-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | LOGAN | UT |
| 2006-06-07 | 435-773-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2006-06-07 | 435-773-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2006-06-02 | 435-238-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CEDAR CITY | UT |
| 2006-05-26 | 435-724-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ROOSEVELT | UT |
| 2006-05-25 | 435-215-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ST GEORGE | UT |
| 2006-05-24 | 435-531-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CEDAR CITY | UT |
| 2006-05-18 | 435-730-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BRIGHAM CY | UT |
| 2006-05-17 | 435-216-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | ST GEORGE | UT |
| 2006-04-19 | 435-277-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | TOOELE | UT |
| 2006-04-19 | 435-277-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | TOOELE | UT |
| 2006-04-05 | 435-671-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | HEBER CITY | UT |
| 2006-04-05 | 435-773-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2006-03-22 | 435-338-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TOOELE | UT |
| 2006-03-22 | 435-709-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HEBER CITY | UT |
| 2006-03-22 | 435-754-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOGAN | UT |
| 2006-03-22 | 435-817-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ST GEORGE | UT |
| 2006-03-22 | 435-868-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CEDAR CITY | UT |
| 2006-03-22 | 435-893-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RICHFIELD | UT |
| 2006-03-22 | 435-919-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRIGHAM CY | UT |
| 2006-02-24 | 435-754-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9636 | LOGAN | UT |
| 2006-02-24 | 435-754-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | LOGAN | UT |
| 2006-02-16 | 435-230-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | BEARRIV CY | UT |
| 2006-02-16 | 435-592-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | CEDAR 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.