NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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 475
PEERLESS NETWORK OF CONNECTICUT, LLC - CT 112
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
2024-10-21 475-362-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F SEYMOUR CT
2024-08-22 475-340-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F OLDGRNWICH CT
2024-08-22 475-363-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WESTPORT CT
2023-08-09 475-466-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MADISON CT
2023-08-09 475-867-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2023-08-09 475-887-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WESTPORT CT
2023-08-09 475-888-5XXX 5000–5999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F FAIRFIELD CT
2023-06-14 475-310-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WALLINGFD CT
2023-06-14 475-315-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F CHESHIRE CT
2023-06-14 475-382-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRANFORD CT
2023-02-22 475-297-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEWTOWN CT
2023-02-22 475-867-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2023-01-27 475-310-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WALLINGFD CT
2023-01-27 475-337-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WATERBURY CT
2023-01-27 475-832-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WILTON CT
2022-11-16 475-310-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WALLINGFD CT
2022-09-25 475-467-7XXX 7000–7999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F TRUMBULL CT
2022-08-18 475-946-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F OLDGRNWICH CT
2022-02-25 475-466-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MADISON CT
2021-09-02 475-675-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F SEYMOUR CT
2021-05-05 475-295-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WATERBURY CT
2021-05-05 475-575-3XXX 3000–3999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F RIDGEFIELD CT
2020-10-08 475-877-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F REDDING CT
2020-09-25 475-262-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F HUNTINGTON CT
2020-09-25 475-271-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MILFORD CT
2020-08-27 475-405-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F CHESHIRE CT
2020-08-18 475-273-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2020-07-27 475-250-3XXX 3000–3999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NORWALK CT
2020-07-27 475-263-5XXX 5000–5999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WATERBURY CT
2020-07-27 475-267-3XXX 3000–3999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEW HAVEN CT
2020-07-27 475-445-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEWTOWN CT
2020-07-27 475-977-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F STAMFORD CT
2020-05-19 475-348-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2020-04-15 475-348-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2020-03-12 475-268-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F STAMFORD CT
2020-03-11 475-264-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DARIEN CT
2020-03-11 475-473-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WOODBURY CT
2020-03-11 475-500-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GREENWICH CT
2020-02-12 475-265-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F TRUMBULL CT
2020-02-12 475-476-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2020-01-29 475-261-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEW HAVEN CT
2020-01-29 475-889-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NORWALK CT
2019-12-16 475-216-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F ANSONIDRBY CT
2019-12-16 475-252-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BYRAM CT
2019-12-16 475-900-2XXX 2000–2999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GUILFORD CT
2019-11-29 475-359-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F STAMFORD CT
2019-11-18 475-215-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F RIDGEFIELD CT
2019-10-17 475-900-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GUILFORD CT
2019-10-03 475-263-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WATERBURY CT
2019-07-31 475-207-5XXX 5000–5999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WOODBURY 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.