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 838
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-01-13 | 838-400-4XXX | 4000–4999 | Assigned | YORKSTREAM COMMUNICATIONS LLC | 977K | ROUND LAKE | NY |
| 2026-01-13 | 838-500-5XXX | 5000–5999 | Assigned | YORKSTREAM COMMUNICATIONS LLC | 977K | ROUND LAKE | NY |
| 2025-11-13 | 838-621-6XXX | 6000–6999 | Assigned | YORKSTREAM COMMUNICATIONS LLC | 977K | SCHENCTADY | NY |
| 2025-11-13 | 838-621-9XXX | 9000–9999 | Assigned | YORKSTREAM COMMUNICATIONS LLC | 977K | SCHENCTADY | NY |
| 2025-06-24 | 838-999-3XXX | 3000–3999 | Assigned | YORKSTREAM COMMUNICATIONS LLC | 977K | PERU | NY |
| 2025-04-08 | 838-988-0XXX | 0000–0999 | Assigned | YORKSTREAM COMMUNICATIONS LLC | 977K | ALBANY | NY |
| 2025-04-08 | 838-988-8XXX | 8000–8999 | Assigned | YORKSTREAM COMMUNICATIONS LLC | 977K | ALBANY | NY |
| 2025-04-08 | 838-988-9XXX | 9000–9999 | Assigned | YORKSTREAM COMMUNICATIONS LLC | 977K | ALBANY | NY |
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.