NumberResearchThousands-blocks in 928-592
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 928-592 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 928-592-0XXX | 0000–0999 | Reserved | QWEST CORPORATION | 9636 | SEDONA | AZ |
| 2021-09-02 | 928-592-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SEDONA | AZ |
| 2009-04-08 | 928-592-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SEDONA | AZ |
| 2009-07-09 | 928-592-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SEDONA | AZ |
| — | 928-592-4XXX | 4000–4999 | Available | SEDONA | AZ | ||
| 2009-09-03 | 928-592-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | SEDONA | AZ |
| — | 928-592-6XXX | 6000–6999 | Available | SEDONA | AZ | ||
| 2009-10-07 | 928-592-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SEDONA | AZ |
| 2009-10-07 | 928-592-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SEDONA | AZ |
| — | 928-592-9XXX | 9000–9999 | Reserved | QWEST CORPORATION | 9636 | SEDONA | 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.