NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 405
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2012-03-21 | 405-459-4XXX | 4000–4999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | POCASSET | OK |
| 2009-09-16 | 405-481-2XXX | 2000–2999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | SHAWNEE | OK |
| 2008-09-19 | 405-380-1XXX | 1000–1999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | SEMINOLE | OK |
| 2006-08-25 | 405-217-5XXX | 5000–5999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | NORMAN | OK |
| 2006-01-25 | 405-322-6XXX | 6000–6999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | NORMAN | OK |
| 2005-09-12 | 405-352-6XXX | 6000–6999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | MINCO | OK |
| 2005-09-12 | 405-381-7XXX | 7000–7999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | TUTTLE | OK |
| 2004-09-23 | 405-547-4XXX | 4000–4999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | PERKINS | OK |
| 2004-08-19 | 405-216-6XXX | 6000–6999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | EDMOND | OK |
| 2004-08-19 | 405-331-2XXX | 2000–2999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | PAULS VLY | OK |
| 2004-08-19 | 405-378-1XXX | 1000–1999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | MOORE | OK |
| 2004-08-19 | 405-622-9XXX | 9000–9999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | MIDWEST CY | OK |
| 2003-05-07 | 405-335-2XXX | 2000–2999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | WYNNEWOOD | OK |
| 2002-11-05 | 405-583-2XXX | 2000–2999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | MULHALL | OK |
| 2002-11-05 | 405-646-2XXX | 2000–2999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | CARNEY | OK |
| 2002-10-15 | 405-621-4XXX | 4000–4999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | BETHANY | OK |
| 2002-10-15 | 405-767-8XXX | 8000–8999 | Assigned | CHICKASAW TELECOMMUNICAIONS SERVICES, INC. | 4630 | BRITTON | 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.