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 331
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-12-13 | 331-298-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | NAPERVILLE | IL |
| 2023-05-01 | 331-867-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | YORKVILLE | IL |
| 2023-02-15 | 331-343-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | DOWNERSGRV | IL |
| 2022-11-08 | 331-388-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | SUGARGROVE | IL |
| 2022-10-04 | 331-290-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | AURORA | IL |
| 2022-08-09 | 331-334-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | BATAVIA | IL |
| 2022-06-23 | 331-282-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | HINSDALE | IL |
| 2022-04-13 | 331-466-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | GLEN ELLYN | IL |
| 2021-07-07 | 331-900-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | ELMHURST | IL |
| 2021-01-30 | 331-500-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | GENEVA | IL |
| 2021-01-30 | 331-600-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | WHEATON | IL |
| 2019-08-21 | 331-239-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | YORKVILLE | IL |
| 2018-12-27 | 331-249-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | NAPERVILLE | IL |
| 2018-06-18 | 331-303-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | ELBURN | IL |
| 2018-06-18 | 331-704-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | KANEVILLE | IL |
| 2018-06-18 | 331-808-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | PLANO | IL |
| 2017-04-26 | 331-310-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | BIG ROCK | IL |
| 2017-04-12 | 331-227-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | SUGARGROVE | IL |
| 2017-04-12 | 331-252-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | WARRENVL | IL |
| 2017-04-12 | 331-315-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | LOMBARD | IL |
| 2017-04-12 | 331-717-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | OSWEGO | IL |
| 2017-04-12 | 331-757-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | LEMONT | IL |
| 2017-04-12 | 331-871-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | W CHICAGO | IL |
| 2017-04-11 | 331-771-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | ST CHARLES | IL |
| 2017-03-17 | 331-219-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | AURORA | IL |
| 2017-03-14 | 331-233-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | DOWNERSGRV | IL |
| 2017-03-07 | 331-204-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | NAPERVILLE | IL |
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.