NumberResearchThousands-blocks in 309-741
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 309-741 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 309-741-0XXX | 0000–0999 | Pending | ELMWOOD | IL | ||
| 2010-01-21 | 309-741-1XXX | 1000–1999 | Assigned | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | ELMWOOD | IL |
| 2018-07-03 | 309-741-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | ELMWOOD | IL |
| 2021-03-26 | 309-741-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | ELMWOOD | IL |
| 2017-09-01 | 309-741-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | ELMWOOD | IL |
| 2019-08-07 | 309-741-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | ELMWOOD | IL |
| 2019-08-07 | 309-741-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | ELMWOOD | IL |
| — | 309-741-7XXX | 7000–7999 | Pending | ELMWOOD | IL | ||
| — | 309-741-8XXX | 8000–8999 | Pending | ELMWOOD | IL | ||
| 2020-07-06 | 309-741-9XXX | 9000–9999 | Assigned | STRATUS NETWORKS | 495J | ELMWOOD | 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.