NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 336-464

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

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 336-464 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
LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 6
SUNCOM DBA T-MOBILE USA 2
NORTH STATE COMMUNICATIONS ADVANCED SVCS, LLC-NC 1
BANDWIDTH.COM CLEC, LLC - NC 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
— 336-464-0XXX 0000–0999Reserved LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 WINSTN SAL NC
— 336-464-1XXX 1000–1999Reserved LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 WINSTN SAL NC
— 336-464-2XXX 2000–2999Reserved LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 WINSTN SAL NC
— 336-464-3XXX 3000–3999Reserved LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 WINSTN SAL NC
— 336-464-4XXX 4000–4999Reserved LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 WINSTN SAL NC
2005-08-19 336-464-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC
2005-12-01 336-464-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC
2010-03-02 336-464-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NC 998E WINSTN SAL NC
2010-03-18 336-464-8XXX 8000–8999Assigned NORTH STATE COMMUNICATIONS ADVANCED SVCS, LLC-NC 361F WINSTN SAL NC
— 336-464-9XXX 9000–9999Reserved LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 WINSTN SAL 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.