NumberResearchRecent thousands-block assignments
11 blocks assigned in September 2026 · 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, September 2026 — NPA 563
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-09-17 | 563-517-2XXX | 2000–2999 | Assigned | ONVOY, LLC - IA | 221F | DECORAH | IA |
| 2026-09-14 | 563-215-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | CLINTON | IA |
| 2026-09-14 | 563-215-5XXX | 5000–5999 | Assigned | ONVOY, LLC - IA | 221F | CLINTON | IA |
| 2026-09-10 | 563-283-0XXX | 0000–0999 | Assigned | ONVOY, LLC - IA | 221F | MUSCATINE | IA |
| 2026-09-10 | 563-283-1XXX | 1000–1999 | Assigned | ONVOY, LLC - IA | 221F | MUSCATINE | IA |
| 2026-09-03 | 563-280-2XXX | 2000–2999 | Assigned | ONVOY, LLC - IA | 221F | DAVENPORT | IA |
| 2026-09-03 | 563-300-1XXX | 1000–1999 | Assigned | ONVOY, LLC - IA | 221F | DAVENPORT | IA |
| 2026-09-02 | 563-221-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DE WITT | IA |
| 2026-09-01 | 563-201-7XXX | 7000–7999 | Assigned | IMON COMMUNICATIONS, LLC - IA | 695G | DYERSVILLE | IA |
| 2026-09-01 | 563-465-6XXX | 6000–6999 | Assigned | IMON COMMUNICATIONS, LLC - IA | 695G | FARLEY | IA |
| 2026-09-01 | 563-624-3XXX | 3000–3999 | Assigned | IMON COMMUNICATIONS, LLC - IA | 695G | EPWORTH | IA |
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.