NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · 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, all time — NPA 501
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-08-17 | 501-582-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | BENTON | AR |
| 2026-08-17 | 501-582-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | BENTON | AR |
| 2026-08-17 | 501-582-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | BENTON | AR |
| 2025-10-28 | 501-559-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | BENTON | AR |
| 2025-10-28 | 501-576-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | CONWAY | AR |
| 2025-10-28 | 501-781-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | HOTSPRINGS | AR |
| 2025-08-20 | 501-527-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | LITTLEROCK | AR |
| 2025-08-20 | 501-561-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | LITTLEROCK | AR |
| 2020-06-10 | 501-629-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | LITTLEROCK | AR |
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.