NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 572
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-05-14 | 572-281-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | CRESCENT | OK |
| 2026-04-01 | 572-230-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | WEWOKA | OK |
| 2024-10-01 | 572-225-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | NORMAN | OK |
| 2024-03-26 | 572-233-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | OKLA CITY | OK |
| 2024-03-05 | 572-726-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | ANADARKO | OK |
| 2023-03-13 | 572-214-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | HENNESSEY | OK |
| 2022-10-25 | 572-206-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | OKLA CITY | OK |
| 2022-05-26 | 572-363-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | CHICKASHA | OK |
| 2022-05-03 | 572-910-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | OKLA CITY | OK |
| 2022-03-02 | 572-568-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | OKLA CITY | OK |
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.