NumberResearchThousands-blocks in 928-291
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 928-291 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 928 blocks
Most active assignees, all time — NPA 928
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-03-29 | 928-291-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | YUMA | AZ |
| 2017-06-12 | 928-291-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | YUMA | AZ |
| 2016-07-18 | 928-291-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AZ | 630E | YUMA | AZ |
| 2016-07-18 | 928-291-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | YUMA | AZ |
| 2016-07-18 | 928-291-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AZ | 630E | YUMA | AZ |
| 2025-01-27 | 928-291-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | YUMA | AZ |
| 2020-11-04 | 928-291-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | YUMA | AZ |
| 2020-11-04 | 928-291-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | YUMA | AZ |
| 2017-11-20 | 928-291-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | YUMA | AZ |
| 2018-03-14 | 928-291-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | 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.