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 815
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-06-03 | 815-290-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | MINOOKA | IL |
| 2021-06-03 | 815-617-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | OTTAWA | IL |
| 2021-06-02 | 815-412-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | FRANKFORT | IL |
| 2021-05-21 | 815-328-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LOCKPORT | IL |
| 2021-05-21 | 815-676-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | PLAINFIELD | IL |
| 2016-07-11 | 815-660-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LOCKPORT | IL |
| 2013-07-29 | 815-348-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | KANKAKEE | IL |
| 2013-04-09 | 815-660-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LOCKPORT | IL |
| 2013-04-09 | 815-687-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | WOODSTOCK | 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.