NumberResearchRecent thousands-block assignments
14 blocks assigned in March 2026 · 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, March 2026 — NPA 572
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-03-31 | 572-600-6XXX | 6000–6999 | Assigned | EXIANT COMMUNICATIONS LLC | 114J | MAUD | OK |
| 2026-03-06 | 572-230-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | WEWOKA | OK |
| 2026-03-06 | 572-274-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | STILLWATER | OK |
| 2026-03-06 | 572-333-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | PAULS VLY | OK |
| 2026-03-06 | 572-472-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | SEMINOLE | OK |
| 2026-03-06 | 572-732-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | WYNNEWOOD | OK |
| 2026-03-05 | 572-200-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | FORT COBB | OK |
| 2026-03-05 | 572-210-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CEMENT | OK |
| 2026-03-05 | 572-226-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BINGER | OK |
| 2026-03-05 | 572-227-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MULHALL | OK |
| 2026-03-05 | 572-236-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | CHICKASHA | OK |
| 2026-03-05 | 572-358-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | CHANDLER | OK |
| 2026-03-05 | 572-600-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | MAUD | OK |
| 2026-03-05 | 572-726-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | ANADARKO | 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.