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 458
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-06-08 | 458-283-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9638 | JACKSONVL | OR |
| 2017-06-27 | 458-209-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9638 | EUGENE | OR |
| 2017-06-27 | 458-209-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9638 | EUGENE | OR |
| 2016-09-07 | 458-231-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9638 | PRINEVILLE | OR |
| 2011-09-26 | 458-205-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9638 | EUGENE | OR |
| 2011-09-26 | 458-205-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9638 | EUGENE | OR |
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.