NumberResearchThousands-blocks in 336-593
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 336-593 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 336 blocks
Most active assignees, all time — NPA 336
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 336-593-0XXX | 0000–0999 | Reserved | BRIGHTSPEED OF NORTH CAROLINA, LLC | 0471 | DANBURY | NC |
| 2007-01-02 | 336-593-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | DANBURY | NC |
| — | 336-593-2XXX | 2000–2999 | Reserved | BRIGHTSPEED OF NORTH CAROLINA, LLC | 0471 | DANBURY | NC |
| — | 336-593-3XXX | 3000–3999 | Reserved | BRIGHTSPEED OF NORTH CAROLINA, LLC | 0471 | DANBURY | NC |
| — | 336-593-4XXX | 4000–4999 | Reserved | BRIGHTSPEED OF NORTH CAROLINA, LLC | 0471 | DANBURY | NC |
| — | 336-593-5XXX | 5000–5999 | Reserved | BRIGHTSPEED OF NORTH CAROLINA, LLC | 0471 | DANBURY | NC |
| 2012-01-05 | 336-593-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - NC | 998E | DANBURY | NC |
| 2019-03-06 | 336-593-7XXX | 7000–7999 | Assigned | ONVOY, LLC - NC | 638E | DANBURY | NC |
| — | 336-593-8XXX | 8000–8999 | Reserved | BRIGHTSPEED OF NORTH CAROLINA, LLC | 0471 | DANBURY | NC |
| — | 336-593-9XXX | 9000–9999 | Reserved | BRIGHTSPEED OF NORTH CAROLINA, LLC | 0471 | DANBURY | NC |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.