NumberResearchThousands-blocks in 478-346
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 478-346 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 478 blocks
Most active assignees, all time — NPA 478
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-01-20 | 478-346-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - GA | 983E | WRIGHTSVL | GA |
| 2023-04-28 | 478-346-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WRIGHTSVL | GA |
| 2024-07-31 | 478-346-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WRIGHTSVL | GA |
| 2021-06-07 | 478-346-3XXX | 3000–3999 | Assigned | ONVOY, LLC - GA | 067D | WRIGHTSVL | GA |
| 2021-06-07 | 478-346-4XXX | 4000–4999 | Assigned | ONVOY, LLC - GA | 067D | WRIGHTSVL | GA |
| 2021-06-29 | 478-346-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - GA | 6116 | WRIGHTSVL | GA |
| 2024-12-04 | 478-346-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | WRIGHTSVL | GA |
| 2021-02-08 | 478-346-7XXX | 7000–7999 | Assigned | ONVOY, LLC - GA | 067D | WRIGHTSVL | GA |
| 2023-07-26 | 478-346-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WRIGHTSVL | GA |
| 2023-07-26 | 478-346-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WRIGHTSVL | GA |
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.