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 539
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-06-05 | 539-214-9XXX | 9000–9999 | Assigned | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | FAIRFAX | OK |
| 2017-12-13 | 539-221-9XXX | 9000–9999 | Assigned | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | HASKELL | OK |
| 2017-08-29 | 539-321-9XXX | 9000–9999 | Assigned | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | MORRIS | OK |
| 2017-01-03 | 539-209-9XXX | 9000–9999 | Assigned | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | WAGONER | OK |
| 2016-07-12 | 539-200-9XXX | 9000–9999 | Assigned | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | BARNSDALL | OK |
| 2016-07-12 | 539-203-9XXX | 9000–9999 | Assigned | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | STROUD | 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.