NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 857-322

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 857-322 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 857 blocks

Most active assignees, all time — NPA 857
ONVOY, LLC - MA 3
PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 2
BANDWIDTH.COM CLEC, LLC - MA 2
COMCAST IP PHONE, 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
2020-02-18 857-322-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EASTBOSTON MA
2017-10-31 857-322-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J EASTBOSTON MA
2017-11-07 857-322-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2020-07-27 857-322-3XXX 3000–3999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EASTBOSTON MA
2019-05-01 857-322-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EASTBOSTON MA
2018-02-06 857-322-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D EASTBOSTON MA
2018-08-06 857-322-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2019-06-12 857-322-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EASTBOSTON MA
2019-01-25 857-322-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D EASTBOSTON MA
2019-01-25 857-322-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D 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.