NumberResearchThousands-blocks in 928-418
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 928-418 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 |
|---|---|---|---|---|---|---|---|
| 2023-07-19 | 928-418-0XXX | 0000–0999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | KINGMAN | AZ |
| 2023-09-15 | 928-418-1XXX | 1000–1999 | Assigned | ONVOY, LLC - AZ | 630E | KINGMAN | AZ |
| 2021-11-05 | 928-418-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AZ | 630E | KINGMAN | AZ |
| 2021-11-05 | 928-418-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | KINGMAN | AZ |
| 2021-09-01 | 928-418-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KINGMAN | AZ |
| 2022-01-11 | 928-418-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | KINGMAN | AZ |
| 2022-01-11 | 928-418-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | KINGMAN | AZ |
| 2022-01-11 | 928-418-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | KINGMAN | AZ |
| 2021-11-16 | 928-418-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | KINGMAN | AZ |
| 2021-08-24 | 928-418-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | KINGMAN | 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.