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 224
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-07-28 | 224-480-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WAUKEGAN | IL |
| 2015-09-02 | 224-470-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SKOKIE | IL |
| 2015-08-18 | 224-714-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EVANSTON | IL |
| 2015-02-25 | 224-347-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARLIGTNHTS | IL |
| 2014-05-12 | 224-236-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BARTLETT | IL |
| 2011-10-18 | 224-788-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ANTIOCH | IL |
| 2011-08-29 | 224-227-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ELGIN | IL |
| 2010-09-03 | 224-637-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WAUKEGAN | IL |
| 2008-09-10 | 224-990-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PLATO CTR | IL |
| 2006-11-15 | 224-858-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HUNTLEY | IL |
| 2006-11-10 | 224-372-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LAKE VILLA | IL |
| 2006-11-08 | 224-585-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PARK RIDGE | IL |
| 2006-11-02 | 224-225-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FOX LAKE | IL |
| 2006-11-01 | 224-678-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ALGONQUIN | IL |
| 2006-11-01 | 224-789-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ZION | IL |
| 2006-05-26 | 224-381-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WAUKEGAN | IL |
| 2006-05-16 | 224-361-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DESPLAINES | IL |
| 2006-03-22 | 224-677-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LAKEZURICH | IL |
| 2006-03-17 | 224-357-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CARY | IL |
| 2006-03-09 | 224-213-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NORTHBROOK | IL |
| 2006-03-09 | 224-436-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LAKEFOREST | IL |
| 2006-03-09 | 224-616-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GLENVIEW | IL |
| 2006-03-09 | 224-778-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MUNDELEIN | IL |
| 2006-03-08 | 224-293-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DUNDEE | IL |
| 2006-03-08 | 224-515-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DEERFIELD | IL |
| 2006-01-19 | 224-735-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARLIGTNHTS | IL |
| 2005-04-07 | 224-520-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ROSELLE | IL |
| 2005-04-07 | 224-875-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ELK GROVE | IL |
| 2005-04-06 | 224-238-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ELGIN | IL |
| 2004-11-01 | 224-218-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HAMPSHIRE | 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.