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 |
|---|---|---|---|---|---|---|---|
| 2015-08-04 | 435-429-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | ST GEORGE | UT |
| 2015-08-04 | 435-429-7XXX | 7000–7999 | Assigned | FIRSTDIGITAL TELECOM, LLC - UT | 5727 | ST GEORGE | UT |
| 2015-07-29 | 435-255-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TOOELE | UT |
| 2015-07-08 | 435-265-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | LOGAN | UT |
| 2015-06-16 | 435-429-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2015-06-16 | 435-429-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2015-06-05 | 435-557-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | LOGAN | UT |
| 2015-06-01 | 435-230-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEARRIV CY | UT |
| 2015-06-01 | 435-562-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | SALINA | UT |
| 2015-06-01 | 435-990-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | BRIAN HEAD | UT |
| 2015-05-06 | 435-222-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | HEBER CITY | UT |
| 2015-04-29 | 435-261-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | BEAVER | UT |
| 2015-04-29 | 435-612-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | MONROE | UT |
| 2015-04-29 | 435-893-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | RICHFIELD | UT |
| 2015-02-27 | 435-901-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PARK CITY | UT |
| 2015-02-12 | 435-255-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | TOOELE | UT |
| 2015-02-12 | 435-255-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | TOOELE | UT |
| 2015-02-12 | 435-255-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | TOOELE | UT |
| 2015-02-12 | 435-383-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | CEDAR CITY | UT |
| 2015-02-05 | 435-429-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | ST GEORGE | UT |
| 2015-02-05 | 435-429-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | ST GEORGE | UT |
| 2015-02-05 | 435-429-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | ST GEORGE | UT |
| 2015-02-03 | 435-212-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | HILDALE | UT |
| 2015-01-28 | 435-515-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | BRIGHAM CY | UT |
| 2015-01-22 | 435-465-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BRIGHAM CY | UT |
| 2015-01-20 | 435-265-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | LOGAN | UT |
| 2015-01-15 | 435-218-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2015-01-15 | 435-265-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | LOGAN | UT |
| 2015-01-15 | 435-265-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | LOGAN | UT |
| 2015-01-15 | 435-359-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2015-01-15 | 435-359-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2015-01-13 | 435-919-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | BRIGHAM CY | UT |
| 2015-01-12 | 435-412-0XXX | 0000–0999 | Assigned | ONVOY, LLC - UT | 871E | GLNCNYONCY | UT |
| 2014-12-19 | 435-265-3XXX | 3000–3999 | Assigned | ONVOY, LLC - UT | 871E | LOGAN | UT |
| 2014-12-19 | 435-265-4XXX | 4000–4999 | Assigned | ONVOY, LLC - UT | 871E | LOGAN | UT |
| 2014-12-19 | 435-406-0XXX | 0000–0999 | Assigned | FIRSTDIGITAL TELECOM, LLC - UT | 5727 | DELTA | UT |
| 2014-12-19 | 435-406-8XXX | 8000–8999 | Assigned | FIRSTDIGITAL TELECOM, LLC - UT | 5727 | DELTA | UT |
| 2014-12-15 | 435-255-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | TOOELE | UT |
| 2014-12-15 | 435-255-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | TOOELE | UT |
| 2014-12-09 | 435-315-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | HEBER CITY | UT |
| 2014-11-19 | 435-393-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | PAROWAN | UT |
| 2014-11-19 | 435-610-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | NEPHI | UT |
| 2014-11-19 | 435-631-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | PARK CITY | UT |
| 2014-11-19 | 435-962-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | PARK CITY | UT |
| 2014-11-13 | 435-255-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | TOOELE | UT |
| 2014-10-31 | 435-359-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | ST GEORGE | UT |
| 2014-10-28 | 435-265-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LOGAN | UT |
| 2014-10-28 | 435-744-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BRIGHAM CY | UT |
| 2014-10-24 | 435-383-9XXX | 9000–9999 | Assigned | FIRSTDIGITAL TELECOM, LLC - UT | 5727 | CEDAR CITY | UT |
| 2014-10-23 | 435-359-4XXX | 4000–4999 | Assigned | ONVOY, LLC - UT | 871E | 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.