NumberResearchThousands-blocks in 409-237
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 409-237 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 409 blocks
Most active assignees, all time — NPA 409
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 |
|---|---|---|---|---|---|---|---|
| 2012-08-01 | 409-237-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | NDLDPTNCHS | TX |
| 2013-05-28 | 409-237-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | NDLDPTNCHS | TX |
| 2014-04-16 | 409-237-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TX | 903C | NDLDPTNCHS | TX |
| 2011-10-25 | 409-237-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TX | 903C | NDLDPTNCHS | TX |
| 2011-12-27 | 409-237-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NDLDPTNCHS | TX |
| 2010-12-02 | 409-237-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | NDLDPTNCHS | TX |
| 2010-01-12 | 409-237-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | NDLDPTNCHS | TX |
| 2014-10-27 | 409-237-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TX | 903C | NDLDPTNCHS | TX |
| 2015-03-11 | 409-237-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | NDLDPTNCHS | TX |
| 2015-03-11 | 409-237-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | NDLDPTNCHS | TX |
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.