NumberResearchThousands-blocks in 336-560
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 336-560 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
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 336-560-0XXX | 0000–0999 | Reserved | PAETEC ITEL, LLC | 829J | SUMMERFLD | NC |
| — | 336-560-1XXX | 1000–1999 | Reserved | PAETEC ITEL, LLC | 829J | SUMMERFLD | NC |
| 2014-12-22 | 336-560-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - NC | 998E | SUMMERFLD | NC |
| 2014-12-22 | 336-560-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - NC | 998E | SUMMERFLD | NC |
| 2015-06-05 | 336-560-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - NC | 998E | SUMMERFLD | NC |
| 2016-01-25 | 336-560-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NC | 638E | SUMMERFLD | NC |
| 2015-07-01 | 336-560-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SUMMERFLD | NC |
| 2011-04-29 | 336-560-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - NC | 998E | SUMMERFLD | NC |
| 2016-01-29 | 336-560-8XXX | 8000–8999 | Assigned | ONVOY, LLC - NC | 638E | SUMMERFLD | NC |
| 2016-01-29 | 336-560-9XXX | 9000–9999 | Assigned | ONVOY, LLC - NC | 638E | SUMMERFLD | NC |
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.