NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 617-608

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 617-608 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
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 6
OMNIPOINT MIAMI E LICENSE, LLC 2
COMCAST IP PHONE, LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 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
— 617-608-0XXX 0000–0999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BROOKLINE MA
— 617-608-1XXX 1000–1999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BROOKLINE MA
— 617-608-2XXX 2000–2999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BROOKLINE MA
2010-09-10 617-608-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BROOKLINE MA
— 617-608-4XXX 4000–4999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BROOKLINE MA
— 617-608-5XXX 5000–5999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BROOKLINE MA
— 617-608-6XXX 6000–6999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BROOKLINE MA
2014-04-25 617-608-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BROOKLINE MA
2013-05-31 617-608-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2020-07-23 617-608-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE 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.