NumberResearchRecent thousands-block assignments
0 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, all time — NPA 224
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 |
|---|---|---|---|---|---|---|---|
| 2016-01-26 | 224-931-1XXX | 1000–1999 | Assigned | ILLINOIS BELL TEL CO | 9329 | MUNDELEIN | IL |
| 2016-01-26 | 224-931-5XXX | 5000–5999 | Assigned | ILLINOIS BELL TEL CO | 9329 | MUNDELEIN | IL |
| 2016-01-26 | 224-931-6XXX | 6000–6999 | Assigned | ILLINOIS BELL TEL CO | 9329 | MUNDELEIN | IL |
| 2016-01-26 | 224-931-7XXX | 7000–7999 | Assigned | ILLINOIS BELL TEL CO | 9329 | MUNDELEIN | IL |
| 2015-12-09 | 224-654-0XXX | 0000–0999 | Assigned | ILLINOIS BELL TEL CO | 9329 | HUNTLEY | IL |
| 2014-11-03 | 224-661-7XXX | 7000–7999 | Assigned | ILLINOIS BELL TEL CO | 9329 | GLENVIEW | IL |
| 2014-11-03 | 224-661-8XXX | 8000–8999 | Assigned | ILLINOIS BELL TEL CO | 9329 | GLENVIEW | IL |
| 2014-11-03 | 224-661-9XXX | 9000–9999 | Assigned | ILLINOIS BELL TEL CO | 9329 | GLENVIEW | IL |
| 2014-05-09 | 224-665-0XXX | 0000–0999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-05-09 | 224-665-1XXX | 1000–1999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-05-09 | 224-665-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-05-09 | 224-665-3XXX | 3000–3999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-05-09 | 224-665-4XXX | 4000–4999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-05-09 | 224-665-5XXX | 5000–5999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-05-09 | 224-665-6XXX | 6000–6999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-05-09 | 224-665-7XXX | 7000–7999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-05-09 | 224-665-8XXX | 8000–8999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-05-09 | 224-665-9XXX | 9000–9999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-667-0XXX | 0000–0999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-667-1XXX | 1000–1999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-667-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-667-3XXX | 3000–3999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-667-4XXX | 4000–4999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-667-5XXX | 5000–5999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-667-6XXX | 6000–6999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-667-7XXX | 7000–7999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-667-8XXX | 8000–8999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-667-9XXX | 9000–9999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-668-0XXX | 0000–0999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-668-1XXX | 1000–1999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-668-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-668-3XXX | 3000–3999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-668-4XXX | 4000–4999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-668-5XXX | 5000–5999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-668-6XXX | 6000–6999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-668-7XXX | 7000–7999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-668-8XXX | 8000–8999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2014-01-02 | 224-668-9XXX | 9000–9999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2013-02-28 | 224-404-8XXX | 8000–8999 | Assigned | ILLINOIS BELL TEL CO | 9329 | ELK GROVE | IL |
| 2012-09-07 | 224-601-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | SKOKIE | IL |
| 2012-07-17 | 224-302-5XXX | 5000–5999 | Assigned | ILLINOIS BELL TEL CO | 9329 | WAUKEGAN | IL |
| 2012-05-01 | 224-251-1XXX | 1000–1999 | Assigned | ILLINOIS BELL TEL CO | 9329 | SKOKIE | IL |
| 2012-05-01 | 224-251-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | SKOKIE | IL |
| 2012-05-01 | 224-251-3XXX | 3000–3999 | Assigned | ILLINOIS BELL TEL CO | 9329 | SKOKIE | IL |
| 2012-05-01 | 224-251-4XXX | 4000–4999 | Assigned | ILLINOIS BELL TEL CO | 9329 | SKOKIE | IL |
| 2012-05-01 | 224-251-5XXX | 5000–5999 | Assigned | ILLINOIS BELL TEL CO | 9329 | SKOKIE | IL |
| 2011-10-25 | 224-541-1XXX | 1000–1999 | Assigned | ILLINOIS BELL TEL CO | 9329 | GRAYSLAKE | IL |
| 2011-05-27 | 224-880-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | LAKEFOREST | IL |
| 2011-05-27 | 224-880-3XXX | 3000–3999 | Assigned | ILLINOIS BELL TEL CO | 9329 | LAKEFOREST | IL |
| 2011-05-27 | 224-880-4XXX | 4000–4999 | Assigned | ILLINOIS BELL TEL CO | 9329 | LAKEFOREST | 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.