NumberResearchThousands-blocks in 309-329
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 309-329 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 |
|---|---|---|---|---|---|---|---|
| 2020-01-27 | 309-329-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | ASTORIA | IL |
| — | 309-329-1XXX | 1000–1999 | Reserved | FRONTIER NORTH, INC. - IL | 1015 | ASTORIA | IL |
| — | 309-329-2XXX | 2000–2999 | Reserved | FRONTIER NORTH, INC. - IL | 1015 | ASTORIA | IL |
| 2012-01-27 | 309-329-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ASTORIA | IL |
| 2021-03-10 | 309-329-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | ASTORIA | IL |
| 2005-03-18 | 309-329-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ASTORIA | IL |
| 2021-01-28 | 309-329-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ASTORIA | IL |
| 2014-06-25 | 309-329-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ASTORIA | IL |
| 2020-09-15 | 309-329-8XXX | 8000–8999 | Assigned | STRATUS NETWORKS | 495J | ASTORIA | IL |
| — | 309-329-9XXX | 9000–9999 | Reserved | FRONTIER NORTH, INC. - IL | 1015 | ASTORIA | 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.