NumberResearchRecent thousands-block assignments
9 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 928
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 |
|---|---|---|---|---|---|---|---|
| 2015-08-20 | 928-318-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2015-07-29 | 928-274-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SEDONA | AZ |
| 2015-07-24 | 928-440-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | FLAGSTAFF | AZ |
| 2015-07-15 | 928-641-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | SEDONA | AZ |
| 2015-07-08 | 928-458-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PRESCOTT | AZ |
| 2015-07-08 | 928-910-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PRESCOTT | AZ |
| 2015-07-02 | 928-439-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DUNCAN | AZ |
| 2015-07-02 | 928-788-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MOHAVE VLY | AZ |
| 2015-06-30 | 928-331-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | GILA BEND | AZ |
| 2015-06-26 | 928-323-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SOMERTON | AZ |
| 2015-06-23 | 928-339-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | ALPINE | AZ |
| 2015-06-18 | 928-605-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | BULLHEADCY | AZ |
| 2015-06-17 | 928-233-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | FLAGSTAFF | AZ |
| 2015-06-17 | 928-233-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | FLAGSTAFF | AZ |
| 2015-06-17 | 928-350-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | PRESCOTT | AZ |
| 2015-06-17 | 928-350-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | PRESCOTT | AZ |
| 2015-06-17 | 928-615-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | YUMA | AZ |
| 2015-06-17 | 928-723-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | YUMA | AZ |
| 2015-06-09 | 928-985-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SAFFORD | AZ |
| 2015-06-08 | 928-316-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PIMA | AZ |
| 2015-06-01 | 928-227-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | PRESCOTT | AZ |
| 2015-06-01 | 928-237-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AZ | 630E | PRESCOTT | AZ |
| 2015-06-01 | 928-440-1XXX | 1000–1999 | Assigned | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| 2015-06-01 | 928-440-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| 2015-06-01 | 928-615-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | YUMA | AZ |
| 2015-06-01 | 928-615-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AZ | 630E | YUMA | AZ |
| 2015-05-19 | 928-733-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | LKHAVASUCY | AZ |
| 2015-05-19 | 928-910-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PRESCOTT | AZ |
| 2015-05-08 | 928-719-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | GLOBE | AZ |
| 2015-05-08 | 928-719-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | GLOBE | AZ |
| 2015-05-08 | 928-719-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | GLOBE | AZ |
| 2015-05-08 | 928-793-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | GLOBE | AZ |
| 2015-04-28 | 928-293-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | KINGMAN | AZ |
| 2015-04-21 | 928-251-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SHOW LOW | AZ |
| 2015-04-21 | 928-293-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | KINGMAN | AZ |
| 2015-04-10 | 928-575-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PARKER | AZ |
| 2015-04-10 | 928-851-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | BOUSE | AZ |
| 2015-04-10 | 928-857-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | CIBOLA | AZ |
| 2015-04-09 | 928-295-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | SEDONA | AZ |
| 2015-04-09 | 928-351-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | GLOBE | AZ |
| 2015-04-09 | 928-351-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | GLOBE | AZ |
| 2015-04-09 | 928-487-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | GLOBE | AZ |
| 2015-04-09 | 928-615-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | YUMA | AZ |
| 2015-04-09 | 928-719-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | GLOBE | AZ |
| 2015-04-09 | 928-970-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | PAYSON | AZ |
| 2015-04-02 | 928-298-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PIMA | AZ |
| 2015-04-02 | 928-923-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | EHRENBERG | AZ |
| 2015-03-24 | 928-404-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | BULLHDCYN | AZ |
| 2015-03-23 | 928-440-0XXX | 0000–0999 | Assigned | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| 2015-03-23 | 928-642-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AZ | 630E | PRESCOTT | AZ |
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.