NumberResearchThousands-blocks in 920-557
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 920-557 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 |
|---|---|---|---|---|---|---|---|
| 2021-11-01 | 920-557-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | BEAVER DAM | WI |
| 2011-09-09 | 920-557-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BEAVER DAM | WI |
| 2016-02-26 | 920-557-2XXX | 2000–2999 | Assigned | ONVOY, LLC - WI | 225C | BEAVER DAM | WI |
| 2016-02-26 | 920-557-3XXX | 3000–3999 | Assigned | ONVOY, LLC - WI | 225C | BEAVER DAM | WI |
| 2018-11-29 | 920-557-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF WISCONSIN, LLC - WI | 227F | BEAVER DAM | WI |
| — | 920-557-5XXX | 5000–5999 | Available | BEAVER DAM | WI | ||
| 2010-02-26 | 920-557-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | BEAVER DAM | WI |
| 2021-03-08 | 920-557-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WI | 225C | BEAVER DAM | WI |
| 2021-03-08 | 920-557-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WI | 225C | BEAVER DAM | WI |
| 2021-11-01 | 920-557-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | BEAVER DAM | 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.