NumberResearchThousands-blocks in 920-350
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 920-350 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-02-02 | 920-350-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | COLUMBUS | WI |
| 2015-06-02 | 920-350-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | COLUMBUS | WI |
| 2007-04-12 | 920-350-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - WI | 6274 | COLUMBUS | WI |
| 2010-12-08 | 920-350-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | COLUMBUS | WI |
| 2018-05-07 | 920-350-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | COLUMBUS | WI |
| 2011-12-16 | 920-350-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - WI | 6274 | COLUMBUS | WI |
| 2011-10-03 | 920-350-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF WISCONSIN, LLC - WI | 227F | COLUMBUS | WI |
| 2013-10-03 | 920-350-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF WISCONSIN, LLC - WI | 227F | COLUMBUS | WI |
| 2014-05-20 | 920-350-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | COLUMBUS | WI |
| 2008-10-23 | 920-350-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | COLUMBUS | 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.