NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 856-513

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 856-513 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 856 blocks

Most active assignees, all time — NPA 856
LEVEL 3 COMMUNICATIONS, LLC - NJ 3
COMCAST IP PHONE, LLC 2
PAETEC ITEL, LLC 1
MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 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
— 856-513-0XXX 0000–0999Reserved PAETEC ITEL, LLC 829J WILLIAMSTN NJ
2004-02-25 856-513-1XXX 1000–1999Assigned MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 WILLIAMSTN NJ
2005-02-22 856-513-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 WILLIAMSTN NJ
2020-03-20 856-513-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WILLIAMSTN NJ
2009-04-09 856-513-4XXX 4000–4999Assigned BLOCK LINE SYSTEMS, LLC - NJ 835E WILLIAMSTN NJ
2006-09-13 856-513-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 WILLIAMSTN NJ
2006-07-18 856-513-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WILLIAMSTN NJ
2014-02-18 856-513-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WILLIAMSTN NJ
2005-02-22 856-513-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 WILLIAMSTN NJ
2005-02-22 856-513-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 WILLIAMSTN NJ

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.