NumberResearchThousands-blocks in 920-228
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 920-228 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 920 blocks
Most active assignees, all time — NPA 920
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 920-228-0XXX | 0000–0999 | Reserved | NEW CELL DBA CELLCOM | 6692 | SEYMOUR | WI |
| — | 920-228-1XXX | 1000–1999 | Reserved | NEW CELL DBA CELLCOM | 6692 | SEYMOUR | WI |
| — | 920-228-2XXX | 2000–2999 | Reserved | NEW CELL DBA CELLCOM | 6692 | SEYMOUR | WI |
| 2008-07-29 | 920-228-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - WI | 6274 | SEYMOUR | WI |
| 2018-12-11 | 920-228-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | SEYMOUR | WI |
| 2021-05-25 | 920-228-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SEYMOUR | WI |
| 2024-08-28 | 920-228-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | SEYMOUR | WI |
| 2014-10-23 | 920-228-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SEYMOUR | WI |
| 2018-09-27 | 920-228-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WI | 225C | SEYMOUR | WI |
| 2021-11-19 | 920-228-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | SEYMOUR | WI |
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.