NumberResearchThousands-blocks in 928-230
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 928-230 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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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-08-11 | 928-230-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | LKHAVASUCY | AZ |
| — | 928-230-1XXX | 1000–1999 | Reserved | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| 2005-02-18 | 928-230-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| 2005-01-18 | 928-230-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| 2004-12-30 | 928-230-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| 2004-10-15 | 928-230-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| — | 928-230-6XXX | 6000–6999 | Reserved | METROPCS, INC. | 5562 | LKHAVASUCY | AZ |
| 2017-06-06 | 928-230-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | LKHAVASUCY | AZ |
| 2004-10-08 | 928-230-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| 2003-02-28 | 928-230-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | LKHAVASUCY | 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.