NumberResearchThousands-blocks in 309-244
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 309-244 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 |
|---|---|---|---|---|---|---|---|
| — | 309-244-0XXX | 0000–0999 | Reserved | ILLINOIS BELL TEL CO | 9329 | DELAVAN | IL |
| 2015-10-08 | 309-244-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | DELAVAN | IL |
| — | 309-244-2XXX | 2000–2999 | Available | DELAVAN | IL | ||
| 2010-01-21 | 309-244-3XXX | 3000–3999 | Assigned | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | DELAVAN | IL |
| 2004-06-21 | 309-244-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | DELAVAN | IL |
| — | 309-244-5XXX | 5000–5999 | Available | DELAVAN | IL | ||
| 2016-06-28 | 309-244-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DELAVAN | IL |
| — | 309-244-7XXX | 7000–7999 | Reserved | ILLINOIS BELL TEL CO | 9329 | DELAVAN | IL |
| — | 309-244-8XXX | 8000–8999 | Reserved | ILLINOIS BELL TEL CO | 9329 | DELAVAN | IL |
| 2023-10-17 | 309-244-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DELAVAN | 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.