NumberResearchThousands-blocks in 309-739
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 309-739 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 |
|---|---|---|---|---|---|---|---|
| — | 309-739-0XXX | 0000–0999 | Pending | SECOR | IL | ||
| 2010-01-21 | 309-739-1XXX | 1000–1999 | Assigned | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | SECOR | IL |
| 2018-11-02 | 309-739-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | SECOR | IL |
| 2021-02-02 | 309-739-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | SECOR | IL |
| — | 309-739-4XXX | 4000–4999 | Pending | SECOR | IL | ||
| — | 309-739-5XXX | 5000–5999 | Pending | SECOR | IL | ||
| — | 309-739-6XXX | 6000–6999 | Pending | SECOR | IL | ||
| 2023-05-19 | 309-739-7XXX | 7000–7999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SECOR | IL |
| 2020-07-07 | 309-739-8XXX | 8000–8999 | Assigned | STRATUS NETWORKS | 495J | SECOR | IL |
| 2026-03-05 | 309-739-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SECOR | 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.