NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 336-477

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 336-477 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
PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 3
SUNCOM DBA T-MOBILE USA 2
LEVEL 3 COMMUNICATIONS, LLC - NC 2
ONVOY, LLC - NC 1
CENTURYLINK COMMUNICATIONS, LLC 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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2022-11-14 336-477-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J MOCKSVILLE NC
2013-09-19 336-477-1XXX 1000–1999Assigned PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F MOCKSVILLE NC
2014-06-06 336-477-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 MOCKSVILLE NC
2017-04-19 336-477-3XXX 3000–3999Assigned ONVOY, LLC - NC 638E MOCKSVILLE NC
2003-10-23 336-477-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 MOCKSVILLE NC
2023-03-07 336-477-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 MOCKSVILLE NC
2020-02-25 336-477-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 MOCKSVILLE NC
2013-10-08 336-477-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MOCKSVILLE NC
2013-11-15 336-477-8XXX 8000–8999Assigned PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F MOCKSVILLE NC
2018-11-28 336-477-9XXX 9000–9999Assigned PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F MOCKSVILLE 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.