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 |
|---|---|---|---|---|---|---|---|
| 2024-08-12 | 539-290-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WUNIONTOWN | OK |
| 2024-08-12 | 539-348-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SO CHETOPA | OK |
| 2024-08-12 | 539-359-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NOWATA | OK |
| 2022-10-19 | 539-287-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | YALE | OK |
| 2022-10-17 | 539-255-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PICHER | OK |
| 2022-10-17 | 539-300-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WESTVILLE | OK |
| 2022-10-17 | 539-386-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RIPLEY | OK |
| 2022-10-14 | 539-465-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AFTON | 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.