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 817
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 |
|---|---|---|---|---|---|---|---|
| 2021-05-06 | 817-550-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | WEATHERFD | TX |
| 2021-05-06 | 817-586-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | GLENDALE | TX |
| 2021-04-16 | 817-285-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | EULESS | TX |
| 2021-04-16 | 817-516-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | KENNEDALE | TX |
| 2019-04-22 | 817-379-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | KELLER | TX |
| 2019-04-19 | 817-374-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | WEATHERFD | TX |
| 2018-11-15 | 817-663-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NRICHLDHLS | TX |
| 2018-11-15 | 817-786-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | EULESS | TX |
| 2018-11-15 | 817-799-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | EULESS | TX |
| 2018-11-15 | 817-920-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | FORT WORTH | TX |
| 2017-11-20 | 817-270-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | AZLE | TX |
| 2017-11-20 | 817-409-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ALVARADO | TX |
| 2017-11-20 | 817-767-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | ROANOKE | TX |
| 2016-03-02 | 817-203-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | GRAPEVINE | TX |
| 2016-03-02 | 817-286-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ATLAS | TX |
| 2016-03-02 | 817-398-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NRICHLDHLS | TX |
| 2016-03-02 | 817-835-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | EULESS | TX |
| 2016-03-02 | 817-839-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | KENNEDALE | TX |
| 2016-03-02 | 817-898-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | KELLER | TX |
| 2015-12-09 | 817-345-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | NRICHLDHLS | TX |
| 2015-12-09 | 817-649-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ARLINGTON | TX |
| 2015-12-09 | 817-775-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | KENNEDALE | TX |
| 2015-12-08 | 817-285-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | EULESS | TX |
| 2015-12-08 | 817-286-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ATLAS | TX |
| 2015-02-26 | 817-753-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | KELLER | TX |
| 2015-02-25 | 817-779-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | MANSFIELD | TX |
| 2013-07-31 | 817-203-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | GRAPEVINE | TX |
| 2013-07-31 | 817-666-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | CLEBURNE | TX |
| 2013-07-31 | 817-947-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | KENNEDALE | TX |
| 2013-07-31 | 817-968-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NRICHLDHLS | TX |
| 2013-04-08 | 817-841-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | FORT WORTH | TX |
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.