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 |
|---|---|---|---|---|---|---|---|
| 2006-04-12 | 928-637-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FLAGSTAFF | AZ |
| 2006-04-06 | 928-221-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | FLAGSTAFF | AZ |
| 2006-04-03 | 928-271-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2006-04-03 | 928-271-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2006-04-03 | 928-550-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | SOMERTON | AZ |
| 2006-03-22 | 928-897-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | KINGMAN | AZ |
| 2006-03-16 | 928-345-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | YUMA | AZ |
| 2006-03-15 | 928-271-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | YUMA | AZ |
| 2006-03-09 | 928-271-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | YUMA | AZ |
| 2006-03-08 | 928-273-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PRESCOTT | AZ |
| 2006-03-07 | 928-566-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| 2006-03-03 | 928-225-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | FLAGSTAFF | AZ |
| 2006-03-01 | 928-221-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FLAGSTAFF | AZ |
| 2006-03-01 | 928-221-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FLAGSTAFF | AZ |
| 2006-02-24 | 928-277-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PRESCOTT | AZ |
| 2006-02-24 | 928-277-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PRESCOTT | AZ |
| 2006-02-24 | 928-388-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2006-02-21 | 928-292-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLIFTON | AZ |
| 2006-02-21 | 928-341-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | YUMA | AZ |
| 2006-02-21 | 928-444-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BULLHEADCY | AZ |
| 2006-02-21 | 928-503-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2006-02-16 | 928-792-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SAFFORD | AZ |
| 2006-02-10 | 928-388-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2006-02-09 | 928-239-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SEDONA | AZ |
| 2006-02-09 | 928-388-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | YUMA | AZ |
| 2006-02-09 | 928-499-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PRESCOTT | AZ |
| 2006-02-09 | 928-864-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FLAGSTAFF | AZ |
| 2006-02-06 | 928-412-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| 2006-01-25 | 928-221-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FLAGSTAFF | AZ |
| 2006-01-25 | 928-221-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FLAGSTAFF | AZ |
| 2006-01-25 | 928-273-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PRESCOTT | AZ |
| 2006-01-25 | 928-846-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LKHAVASUCY | AZ |
| 2006-01-19 | 928-274-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SEDONA | AZ |
| 2006-01-13 | 928-249-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | LKMHVRNCHS | AZ |
| 2006-01-13 | 928-310-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | FLAGSTAFF | AZ |
| 2006-01-13 | 928-369-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PINETOP | AZ |
| 2006-01-12 | 928-234-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BULLHEADCY | AZ |
| 2006-01-12 | 928-444-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BULLHEADCY | AZ |
| 2006-01-06 | 928-221-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | FLAGSTAFF | AZ |
| 2006-01-06 | 928-503-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | YUMA | AZ |
| 2006-01-06 | 928-503-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | YUMA | AZ |
| 2005-12-19 | 928-897-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | KINGMAN | AZ |
| 2005-12-19 | 928-897-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | KINGMAN | AZ |
| 2005-12-09 | 928-224-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | WINSLOW | AZ |
| 2005-12-09 | 928-852-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | SEDONA | AZ |
| 2005-12-09 | 928-863-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| 2005-12-05 | 928-336-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2005-12-05 | 928-341-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | YUMA | AZ |
| 2005-11-30 | 928-273-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PRESCOTT | AZ |
| 2005-11-30 | 928-785-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | 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.