NumberResearchThousands-blocks in 920-250
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 920-250 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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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 920-250-0XXX | 0000–0999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | NEW LONDON | WI |
| — | 920-250-1XXX | 1000–1999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | NEW LONDON | WI |
| — | 920-250-2XXX | 2000–2999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | NEW LONDON | WI |
| — | 920-250-3XXX | 3000–3999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | NEW LONDON | WI |
| 2025-12-09 | 920-250-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | NEW LONDON | WI |
| 2007-03-20 | 920-250-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | NEW LONDON | WI |
| 2013-02-05 | 920-250-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | NEW LONDON | WI |
| 2016-06-17 | 920-250-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | NEW LONDON | WI |
| 2016-03-15 | 920-250-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WI | 225C | NEW LONDON | WI |
| 2016-03-15 | 920-250-9XXX | 9000–9999 | Assigned | ONVOY, LLC - WI | 225C | NEW LONDON | WI |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.