NumberResearchThousands-blocks in 803-450
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 803-450 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2008-11-04 | 803-450-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - SC | 077F | BARNWELL | SC |
| 2007-06-21 | 803-450-1XXX | 1000–1999 | Assigned | SOUTH CAROLINA NET, INC. - SC | 1784 | BARNWELL | SC |
| 2011-02-28 | 803-450-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - SC | 5258 | BARNWELL | SC |
| — | 803-450-3XXX | 3000–3999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BARNWELL | SC |
| 2012-03-21 | 803-450-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - SC | 077F | BARNWELL | SC |
| 2011-10-21 | 803-450-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BARNWELL | SC |
| 2012-04-04 | 803-450-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC | 6398 | BARNWELL | SC |
| 2012-05-24 | 803-450-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BARNWELL | SC |
| — | 803-450-8XXX | 8000–8999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BARNWELL | SC |
| — | 803-450-9XXX | 9000–9999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BARNWELL | 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.