NumberResearchThousands-blocks in 803-399
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 803-399 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 803 blocks
Most active assignees, all time — NPA 803
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 |
|---|---|---|---|---|---|---|---|
| 2008-11-05 | 803-399-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - SC | 077F | LEXINGTON | SC |
| 2012-04-18 | 803-399-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LEXINGTON | SC |
| 2008-05-15 | 803-399-2XXX | 2000–2999 | Assigned | WINDSTREAM SOUTH CAROLINA, INC. | 0517 | LEXINGTON | SC |
| 2008-05-15 | 803-399-3XXX | 3000–3999 | Assigned | WINDSTREAM SOUTH CAROLINA, INC. | 0517 | LEXINGTON | SC |
| 2008-05-15 | 803-399-4XXX | 4000–4999 | Assigned | WINDSTREAM SOUTH CAROLINA, INC. | 0517 | LEXINGTON | SC |
| 2008-05-15 | 803-399-5XXX | 5000–5999 | Assigned | WINDSTREAM SOUTH CAROLINA, INC. | 0517 | LEXINGTON | SC |
| 2008-05-15 | 803-399-6XXX | 6000–6999 | Assigned | WINDSTREAM SOUTH CAROLINA, INC. | 0517 | LEXINGTON | SC |
| 2013-02-07 | 803-399-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - SC | 5258 | LEXINGTON | SC |
| 2013-01-24 | 803-399-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LEXINGTON | SC |
| 2008-10-20 | 803-399-9XXX | 9000–9999 | Assigned | SOUTH CAROLINA NET, INC. - SC | 1784 | LEXINGTON | SC |
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.