NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 857
PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 80
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
2024-10-21 857-290-6XXX 6000–6999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F NEWTON MA
2022-05-24 857-394-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BELMONT MA
2021-09-08 857-995-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SOMERVILLE MA
2020-12-22 857-369-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-12-22 857-369-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-12-22 857-369-2XXX 2000–2999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-12-22 857-369-3XXX 3000–3999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-12-22 857-369-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-12-22 857-369-5XXX 5000–5999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-12-22 857-369-6XXX 6000–6999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-12-22 857-369-7XXX 7000–7999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-12-22 857-369-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-12-22 857-369-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-10-12 857-227-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SOMERVILLE MA
2020-09-28 857-877-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BRIGHTON MA
2020-07-27 857-322-3XXX 3000–3999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EASTBOSTON MA
2020-07-27 857-524-7XXX 7000–7999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SO BOSTON MA
2020-04-28 857-355-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EVERETT MA
2020-03-27 857-358-7XXX 7000–7999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F QUINCY MA
2020-03-16 857-353-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2020-03-16 857-357-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CAMBRIDGE MA
2020-03-16 857-423-7XXX 7000–7999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BROOKLINE MA
2020-02-18 857-297-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F NEWTON MA
2020-02-18 857-322-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EASTBOSTON MA
2019-11-29 857-356-3XXX 3000–3999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2019-02-04 857-349-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WINTHROP MA
2019-02-04 857-524-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SO BOSTON MA
2018-10-26 857-520-6XXX 6000–6999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F HYDE PARK MA
2018-10-09 857-386-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CHELSEA MA
2018-10-01 857-290-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F NEWTON MA
2018-10-01 857-386-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CHELSEA MA
2018-10-01 857-663-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F DORCHESTER MA
2018-10-01 857-760-6XXX 6000–6999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WATERTOWN MA
2018-03-20 857-361-5XXX 5000–5999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BROOKLINE MA
2018-03-20 857-773-2XXX 2000–2999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F JAMAICA PL MA
2018-02-09 857-419-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F MILTON MA
2016-09-16 857-410-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CHARLESTN MA
2015-11-06 857-407-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F ROXBURY MA
2015-11-06 857-504-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2015-10-14 857-407-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F ROXBURY MA
2015-10-14 857-504-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2015-05-29 857-352-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BROOKLINE MA
2015-05-14 857-304-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WATERTOWN MA
2015-05-14 857-626-7XXX 7000–7999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BELMONT MA
2015-05-14 857-777-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CAMBRIDGE MA
2015-04-30 857-273-5XXX 5000–5999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F JAMAICA PL MA
2015-04-30 857-316-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BRIGHTON MA
2015-04-21 857-402-6XXX 6000–6999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EASTBOSTON MA
2014-12-03 857-302-6XXX 6000–6999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2014-07-03 857-345-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F HYDE PARK MA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.