NumberResearchRecent thousands-block assignments
16 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, last 30 days — NPA 563
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-02-15 | 563-600-8XXX | 8000–8999 | Assigned | ONVOY, LLC - IA | 221F | LANSING | IA |
| 2021-02-15 | 563-635-5XXX | 5000–5999 | Assigned | ONVOY, LLC - IA | 221F | LE CLAIRE | IA |
| 2021-02-15 | 563-649-8XXX | 8000–8999 | Assigned | ONVOY, LLC - IA | 221F | ATALISSA | IA |
| 2021-02-15 | 563-655-1XXX | 1000–1999 | Assigned | ONVOY, LLC - IA | 221F | DE WITT | IA |
| 2021-02-15 | 563-657-2XXX | 2000–2999 | Assigned | ONVOY, LLC - IA | 221F | WALCOTT | IA |
| 2021-02-15 | 563-657-5XXX | 5000–5999 | Assigned | ONVOY, LLC - IA | 221F | WALCOTT | IA |
| 2021-02-15 | 563-661-2XXX | 2000–2999 | Assigned | ONVOY, LLC - IA | 221F | MAQUOKETA | IA |
| 2021-02-15 | 563-661-3XXX | 3000–3999 | Assigned | ONVOY, LLC - IA | 221F | MAQUOKETA | IA |
| 2021-02-15 | 563-661-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | MAQUOKETA | IA |
| 2021-02-15 | 563-666-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | WALCOTT | IA |
| 2021-02-15 | 563-674-8XXX | 8000–8999 | Assigned | ONVOY, LLC - IA | 221F | DELMAR | IA |
| 2021-02-15 | 563-677-8XXX | 8000–8999 | Assigned | ONVOY, LLC - IA | 221F | CHARLOTTE | IA |
| 2021-02-15 | 563-724-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | MOSCOW | IA |
| 2021-02-15 | 563-758-8XXX | 8000–8999 | Assigned | ONVOY, LLC - IA | 221F | WORTHINGTN | IA |
| 2021-02-15 | 563-785-8XXX | 8000–8999 | Assigned | ONVOY, LLC - IA | 221F | DURANT | IA |
| 2021-02-15 | 563-800-3XXX | 3000–3999 | Assigned | ONVOY, LLC - IA | 221F | CALMAR | IA |
| 2021-02-15 | 563-800-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | CALMAR | IA |
| 2021-02-15 | 563-853-6XXX | 6000–6999 | Assigned | ONVOY, LLC - IA | 221F | LUXEMBURG | IA |
| 2021-02-15 | 563-856-6XXX | 6000–6999 | Assigned | ONVOY, LLC - IA | 221F | COLESBURG | IA |
| 2021-02-15 | 563-856-8XXX | 8000–8999 | Assigned | ONVOY, LLC - IA | 221F | COLESBURG | IA |
| 2021-02-15 | 563-870-0XXX | 0000–0999 | Assigned | ONVOY, LLC - IA | 221F | HOLY CROSS | IA |
| 2021-02-15 | 563-893-3XXX | 3000–3999 | Assigned | ONVOY, LLC - IA | 221F | BENNETT | IA |
| 2021-02-15 | 563-921-0XXX | 0000–0999 | Assigned | ONVOY, LLC - IA | 221F | NEW VIENNA | IA |
| 2021-02-15 | 563-922-0XXX | 0000–0999 | Assigned | ONVOY, LLC - IA | 221F | DELHI | IA |
| 2021-02-15 | 563-925-8XXX | 8000–8999 | Assigned | ONVOY, LLC - IA | 221F | GREELEY | IA |
| 2021-02-15 | 563-926-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | HOPKINTON | IA |
| 2021-02-15 | 563-932-8XXX | 8000–8999 | Assigned | ONVOY, LLC - IA | 221F | RYAN | IA |
| 2021-02-15 | 563-944-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | LOWDEN | IA |
| 2021-02-15 | 563-945-5XXX | 5000–5999 | Assigned | ONVOY, LLC - IA | 221F | STANWOOD | IA |
| 2021-02-15 | 563-946-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | ROCHESTER | IA |
| 2021-01-29 | 563-276-0XXX | 0000–0999 | Assigned | ONVOY, LLC - IA | 221F | WAUKON | IA |
| 2021-01-29 | 563-276-1XXX | 1000–1999 | Assigned | ONVOY, LLC - IA | 221F | WAUKON | IA |
| 2021-01-29 | 563-276-6XXX | 6000–6999 | Assigned | ONVOY, LLC - IA | 221F | WAUKON | IA |
| 2021-01-29 | 563-276-7XXX | 7000–7999 | Assigned | ONVOY, LLC - IA | 221F | WAUKON | IA |
| 2021-01-20 | 563-291-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | DUBUQUE | IA |
| 2021-01-11 | 563-291-3XXX | 3000–3999 | Assigned | ONVOY, LLC - IA | 221F | DUBUQUE | IA |
| 2021-01-11 | 563-291-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | DUBUQUE | IA |
| 2021-01-11 | 563-291-5XXX | 5000–5999 | Assigned | ONVOY, LLC - IA | 221F | DUBUQUE | IA |
| 2021-01-11 | 563-291-6XXX | 6000–6999 | Assigned | ONVOY, LLC - IA | 221F | DUBUQUE | IA |
| 2020-12-18 | 563-283-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | MUSCATINE | IA |
| 2020-12-07 | 563-206-6XXX | 6000–6999 | Assigned | STRATUS NETWORKS | 495J | CLINTON | IA |
| 2020-12-07 | 563-279-3XXX | 3000–3999 | Assigned | STRATUS NETWORKS | 495J | DAVENPORT | IA |
| 2020-10-28 | 563-296-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DAVENPORT | IA |
| 2020-10-28 | 563-296-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DAVENPORT | IA |
| 2020-10-28 | 563-296-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DAVENPORT | IA |
| 2020-10-28 | 563-296-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DAVENPORT | IA |
| 2020-10-28 | 563-296-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DAVENPORT | IA |
| 2020-10-23 | 563-895-8XXX | 8000–8999 | Assigned | TWILIO INTERNATIONAL, INC. | 506J | DAVENPORT | IA |
| 2020-10-08 | 563-893-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | BENNETT | IA |
| 2020-10-08 | 563-946-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IA | 8344 | ROCHESTER | 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.