NumberResearchThousands-blocks in 309-504
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 309-504 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
Jul 2026
Jun 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2019-06-18 | 309-504-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | DANVERS | IL |
| 2019-06-18 | 309-504-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | DANVERS | IL |
| 2020-06-11 | 309-504-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | DANVERS | IL |
| 2022-10-11 | 309-504-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | DANVERS | IL |
| 2023-05-03 | 309-504-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DANVERS | IL |
| 2018-11-27 | 309-504-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | DANVERS | IL |
| 2023-05-19 | 309-504-6XXX | 6000–6999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | DANVERS | IL |
| 2014-07-08 | 309-504-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DANVERS | IL |
| 2011-03-25 | 309-504-8XXX | 8000–8999 | Assigned | YMAX COMMUNICATIONS CORP. - IL | 259E | DANVERS | IL |
| 2010-02-04 | 309-504-9XXX | 9000–9999 | Assigned | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | DANVERS | 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.