NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 860-733

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 860-733 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 860 blocks

Most active assignees, all time — NPA 860
NEW CINGULAR WIRELESS PCS, LLC - DC 4
PEERLESS NETWORK OF CONNECTICUT, LLC - CT 2
LEVEL 3 COMMUNICATIONS, LLC - CT 2
ONVOY, LLC - CT 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
2005-01-25 860-733-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARWINTON CT
2013-04-05 860-733-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F HARWINTON CT
2007-01-16 860-733-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARWINTON CT
2007-12-07 860-733-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARWINTON CT
— 860-733-4XXX 4000–4999Reserved LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARWINTON CT
2007-12-07 860-733-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARWINTON CT
2015-05-01 860-733-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C HARWINTON CT
2014-06-06 860-733-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HARWINTON CT
2013-04-05 860-733-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F HARWINTON CT
2015-10-01 860-733-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARWINTON CT

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.