NumberResearchThousands-blocks in 479-203
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 479-203 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 479 blocks
Most active assignees, all time — NPA 479
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 |
|---|---|---|---|---|---|---|---|
| 2024-05-22 | 479-203-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | ELMSPRINGS | AR |
| 2024-10-10 | 479-203-1XXX | 1000–1999 | Assigned | ONVOY, LLC - AR | 348F | ELMSPRINGS | AR |
| 2021-07-22 | 479-203-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AR | 348F | ELMSPRINGS | AR |
| 2021-07-22 | 479-203-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AR | 348F | ELMSPRINGS | AR |
| — | 479-203-4XXX | 4000–4999 | Reserved | SOUTHWESTERN BELL TELEPHONE COMPANY - AR | 8870 | ELMSPRINGS | AR |
| — | 479-203-5XXX | 5000–5999 | Reserved | SOUTHWESTERN BELL TELEPHONE COMPANY - AR | 8870 | ELMSPRINGS | AR |
| 2009-03-12 | 479-203-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ELMSPRINGS | AR |
| 2006-10-30 | 479-203-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | ELMSPRINGS | AR |
| 2009-08-27 | 479-203-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ELMSPRINGS | AR |
| — | 479-203-9XXX | 9000–9999 | Reserved | SOUTHWESTERN BELL TELEPHONE COMPANY - AR | 8870 | ELMSPRINGS | AR |
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.