NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 617-418

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 617-418 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 617 blocks

Most active assignees, all time — NPA 617
LEVEL 3 COMMUNICATIONS, LLC - MA 4
COMCAST IP PHONE, LLC 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 2
PAETEC ITEL, LLC 1
MCIMETRO ACCESS TRANSMISSION SERVICES 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
2011-07-06 617-418-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2005-10-18 617-418-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 EASTBOSTON MA
2005-02-08 617-418-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 EASTBOSTON MA
2006-05-17 617-418-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 EASTBOSTON MA
2005-10-18 617-418-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 EASTBOSTON MA
2004-12-06 617-418-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J EASTBOSTON MA
— 617-418-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EASTBOSTON MA
2006-10-05 617-418-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J EASTBOSTON MA
2003-08-11 617-418-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J EASTBOSTON MA
2011-02-02 617-418-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA

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.