NumberResearchThousands-blocks in 478-304
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 478-304 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2007-02-22 | 478-304-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | DUBLIN | GA |
| 2008-02-08 | 478-304-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | DUBLIN | GA |
| 2011-01-10 | 478-304-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | DUBLIN | GA |
| 2010-06-04 | 478-304-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - GA | 983E | DUBLIN | GA |
| 2011-01-20 | 478-304-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | DUBLIN | GA |
| 2010-07-28 | 478-304-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DUBLIN | GA |
| 2011-11-21 | 478-304-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DUBLIN | GA |
| 2012-04-16 | 478-304-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - GA | 983E | DUBLIN | GA |
| 2025-01-14 | 478-304-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DUBLIN | GA |
| 2021-02-12 | 478-304-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | DUBLIN | 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.