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 563
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-01-26 | 563-867-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | DAVENPORT | IA |
| 2024-01-26 | 563-867-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | DAVENPORT | IA |
| 2022-10-21 | 563-661-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | MAQUOKETA | IA |
| 2022-10-17 | 563-276-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | WAUKON | IA |
| 2022-10-10 | 563-550-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | CALMAR | IA |
| 2022-09-16 | 563-944-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | LOWDEN | IA |
| 2022-08-30 | 563-363-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | MANCHESTER | IA |
| 2022-08-07 | 563-283-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | MUSCATINE | IA |
| 2022-08-07 | 563-307-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | DUBUQUE | IA |
| 2022-08-07 | 563-477-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | CLINTON | IA |
| 2022-08-07 | 563-644-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | DECORAH | IA |
| 2021-04-02 | 563-867-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | DAVENPORT | IA |
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.