NumberResearchThousands-blocks in 405-335
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 405-335 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 405 blocks
Most active assignees, all time — NPA 405
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-11-28 | 405-335-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | WYNNEWOOD | OK |
| 2021-01-30 | 405-335-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF OKLAHOMA, LLC - OK | 384H | WYNNEWOOD | OK |
| 2003-05-07 | 405-335-2XXX | 2000–2999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | WYNNEWOOD | OK |
| 2014-02-03 | 405-335-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | WYNNEWOOD | OK |
| 2016-06-21 | 405-335-4XXX | 4000–4999 | Assigned | ONVOY, LLC - OK | 409F | WYNNEWOOD | OK |
| 2016-06-21 | 405-335-5XXX | 5000–5999 | Assigned | ONVOY, LLC - OK | 409F | WYNNEWOOD | OK |
| 2021-01-04 | 405-335-6XXX | 6000–6999 | Assigned | ONVOY, LLC - OK | 409F | WYNNEWOOD | OK |
| 2021-01-04 | 405-335-7XXX | 7000–7999 | Assigned | ONVOY, LLC - OK | 409F | WYNNEWOOD | OK |
| 2024-12-26 | 405-335-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WYNNEWOOD | OK |
| 2022-11-25 | 405-335-9XXX | 9000–9999 | Assigned | ONVOY, LLC - OK | 409F | WYNNEWOOD | OK |
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.