NumberResearchThousands-blocks in 309-733
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 309-733 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 309 blocks
Most active assignees, all time — NPA 309
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-06-15 | 309-733-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | GROVELAND | IL |
| — | 309-733-1XXX | 1000–1999 | Available | GROVELAND | IL | ||
| — | 309-733-2XXX | 2000–2999 | Available | GROVELAND | IL | ||
| 2017-12-28 | 309-733-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | GROVELAND | IL |
| — | 309-733-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | GROVELAND | IL |
| — | 309-733-5XXX | 5000–5999 | Available | GROVELAND | IL | ||
| — | 309-733-6XXX | 6000–6999 | Available | GROVELAND | IL | ||
| 2020-03-11 | 309-733-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | GROVELAND | IL |
| — | 309-733-8XXX | 8000–8999 | Available | GROVELAND | IL | ||
| — | 309-733-9XXX | 9000–9999 | Available | GROVELAND | IL |
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.