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 |
|---|---|---|---|---|---|---|---|
| 2006-10-10 | 928-251-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | SHOW LOW | AZ |
| 2006-10-02 | 928-225-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | FLAGSTAFF | AZ |
| 2006-09-28 | 928-255-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FLAGSTAFF | AZ |
| 2006-09-26 | 928-566-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| 2006-09-19 | 928-202-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SEDONA | AZ |
| 2006-09-19 | 928-499-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PRESCOTT | AZ |
| 2006-09-18 | 928-793-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | GLOBE | AZ |
| 2006-08-30 | 928-444-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BULLHEADCY | AZ |
| 2006-08-25 | 928-277-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PRESCOTT | AZ |
| 2006-08-25 | 928-277-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PRESCOTT | AZ |
| 2006-08-22 | 928-237-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PRESCOTT | AZ |
| 2006-08-15 | 928-310-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | FLAGSTAFF | AZ |
| 2006-08-15 | 928-358-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PINETOP | AZ |
| 2006-08-09 | 928-550-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | SOMERTON | AZ |
| 2006-08-09 | 928-550-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SOMERTON | AZ |
| 2006-08-08 | 928-276-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2006-08-04 | 928-792-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | SAFFORD | AZ |
| 2006-08-01 | 928-458-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PRESCOTT | AZ |
| 2006-07-28 | 928-550-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SOMERTON | AZ |
| 2006-07-26 | 928-358-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PINETOP | AZ |
| 2006-07-18 | 928-225-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | FLAGSTAFF | AZ |
| 2006-07-17 | 928-566-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| 2006-07-06 | 928-287-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2006-06-26 | 928-254-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SEDONA | AZ |
| 2006-06-26 | 928-377-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | KINGMAN | AZ |
| 2006-06-21 | 928-846-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LKHAVASUCY | AZ |
| 2006-06-20 | 928-202-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SEDONA | AZ |
| 2006-06-14 | 928-287-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | YUMA | AZ |
| 2006-06-14 | 928-287-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | YUMA | AZ |
| 2006-06-12 | 928-358-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PINETOP | AZ |
| 2006-06-08 | 928-444-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BULLHEADCY | AZ |
| 2006-06-05 | 928-377-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | KINGMAN | AZ |
| 2006-06-05 | 928-792-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SAFFORD | AZ |
| 2006-05-30 | 928-232-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WICKENBURG | AZ |
| 2006-05-26 | 928-566-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| 2006-05-25 | 928-225-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | FLAGSTAFF | AZ |
| 2006-05-19 | 928-377-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | KINGMAN | AZ |
| 2006-05-17 | 928-444-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BULLHEADCY | AZ |
| 2006-05-17 | 928-444-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BULLHEADCY | AZ |
| 2006-05-16 | 928-271-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2006-05-16 | 928-274-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SEDONA | AZ |
| 2006-05-15 | 928-271-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | YUMA | AZ |
| 2006-05-15 | 928-271-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | YUMA | AZ |
| 2006-05-09 | 928-273-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PRESCOTT | AZ |
| 2006-05-08 | 928-271-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2006-05-08 | 928-271-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2006-05-05 | 928-436-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | GILA BEND | AZ |
| 2006-05-02 | 928-271-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2006-05-02 | 928-377-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | KINGMAN | AZ |
| 2006-04-12 | 928-637-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FLAGSTAFF | 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.