NumberResearchThousands-blocks in 817-753
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 817-753 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 817 blocks
Most active assignees, all time — NPA 817
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 |
|---|---|---|---|---|---|---|---|
| 2019-04-19 | 817-753-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | KELLER | TX |
| 2019-12-03 | 817-753-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | KELLER | TX |
| 2025-03-10 | 817-753-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | KELLER | TX |
| — | 817-753-3XXX | 3000–3999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | KELLER | TX |
| 2024-07-31 | 817-753-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TX | 903C | KELLER | TX |
| 2021-12-07 | 817-753-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | KELLER | TX |
| 2003-09-22 | 817-753-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | KELLER | TX |
| 2003-09-22 | 817-753-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | KELLER | TX |
| 2020-01-25 | 817-753-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | KELLER | TX |
| 2015-02-26 | 817-753-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | KELLER | TX |
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.