NumberResearchThousands-blocks in 331-808
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 331-808 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 331 blocks
Most active assignees, all time — NPA 331
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-06-08 | 331-808-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | PLANO | IL |
| 2016-03-10 | 331-808-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | PLANO | IL |
| 2016-03-10 | 331-808-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | PLANO | IL |
| 2016-06-15 | 331-808-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | PLANO | IL |
| 2018-11-06 | 331-808-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | PLANO | IL |
| 2019-08-07 | 331-808-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | PLANO | IL |
| 2021-02-02 | 331-808-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | PLANO | IL |
| 2020-08-30 | 331-808-7XXX | 7000–7999 | Assigned | STRATUS NETWORKS | 495J | PLANO | IL |
| 2018-06-18 | 331-808-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | PLANO | IL |
| 2016-10-26 | 331-808-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | PLANO | IL |
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.