NumberResearchRecent thousands-block assignments
6 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, last 30 days — NPA 331
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 |
|---|---|---|---|---|---|---|---|
| 2026-09-04 | 331-771-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | ST CHARLES | IL |
| 2026-09-03 | 331-297-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | BATAVIA | IL |
| 2026-09-03 | 331-320-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | BARTLETT | IL |
| 2026-09-03 | 331-346-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | NAPERVILLE | IL |
| 2026-08-21 | 331-289-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | HINSDALE | IL |
| 2026-08-21 | 331-462-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | LOMBARD | IL |
| 2026-08-11 | 331-202-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | ELMHURST | IL |
| 2026-08-11 | 331-202-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | ELMHURST | IL |
| 2026-08-06 | 331-347-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | WHEATON | IL |
| 2026-07-28 | 331-347-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | WHEATON | IL |
| 2026-05-07 | 331-342-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | NAPERVILLE | IL |
| 2026-04-16 | 331-283-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2026-04-08 | 331-206-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2026-03-12 | 331-339-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2026-03-02 | 331-788-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2026-02-02 | 331-344-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | W CHICAGO | IL |
| 2026-01-27 | 331-283-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2026-01-27 | 331-339-9XXX | 9000–9999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2026-01-27 | 331-342-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | NAPERVILLE | IL |
| 2025-12-12 | 331-283-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2025-12-12 | 331-339-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-11-05 | 331-340-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | ITASCA | IL |
| 2025-10-02 | 331-283-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2025-08-21 | 331-331-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-9XXX | 9000–9999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-14 | 331-202-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | ELMHURST | IL |
| 2025-08-14 | 331-283-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2025-03-13 | 331-837-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | W CHICAGO | IL |
| 2025-01-08 | 331-329-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-01-08 | 331-329-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2024-12-13 | 331-324-9XXX | 9000–9999 | Assigned | ONVOY, LLC | 224C | YORKVILLE | IL |
| 2024-12-13 | 331-800-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | W CHICAGO | IL |
| 2024-10-17 | 331-224-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | ITASCA | IL |
| 2024-07-05 | 331-299-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | HINSDALE | IL |
| 2024-07-05 | 331-326-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | DOWNERSGRV | IL |
| 2024-07-05 | 331-341-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | PLANO | IL |
| 2024-06-06 | 331-298-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | NAPERVILLE | IL |
| 2024-06-06 | 331-324-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | YORKVILLE | IL |
| 2024-06-05 | 331-299-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | HINSDALE | IL |
| 2024-05-29 | 331-326-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | DOWNERSGRV | IL |
| 2024-05-29 | 331-326-9XXX | 9000–9999 | Assigned | ONVOY, LLC | 224C | DOWNERSGRV | IL |
| 2024-05-14 | 331-325-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | LEMONT | IL |
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.