NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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, last 30 days — NPA 857
BANDWIDTH.COM CLEC, LLC - MA 1
AHOI 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
2011-04-08 857-600-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-04-08 857-600-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-04-04 857-321-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2011-04-01 857-400-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2011-03-11 857-210-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2011-03-10 857-321-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2011-02-23 857-200-1XXX 1000–1999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-23 857-200-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2011-02-23 857-200-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2011-02-23 857-261-0XXX 0000–0999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-23 857-261-1XXX 1000–1999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-23 857-261-2XXX 2000–2999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-23 857-261-3XXX 3000–3999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-23 857-261-4XXX 4000–4999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-23 857-261-5XXX 5000–5999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-23 857-261-6XXX 6000–6999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-23 857-261-7XXX 7000–7999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-23 857-261-8XXX 8000–8999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-23 857-261-9XXX 9000–9999Assigned METROPCS, INC. 5562 BOSTON MA
2011-02-17 857-209-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-02-17 857-400-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2011-02-11 857-264-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D BOSTON MA
2011-02-11 857-300-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D BOSTON MA
2011-01-26 857-333-0XXX 0000–0999Assigned METROPCS, INC. 5562 BOSTON MA
2011-01-26 857-333-1XXX 1000–1999Assigned METROPCS, INC. 5562 BOSTON MA
2011-01-26 857-333-2XXX 2000–2999Assigned METROPCS, INC. 5562 BOSTON MA
2011-01-26 857-333-3XXX 3000–3999Assigned METROPCS, INC. 5562 BOSTON MA
2011-01-26 857-333-4XXX 4000–4999Assigned METROPCS, INC. 5562 BOSTON MA
2011-01-13 857-300-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2011-01-13 857-300-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2011-01-12 857-574-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E EASTBOSTON MA
2011-01-10 857-200-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2010-12-22 857-264-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-12-16 857-204-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-12-16 857-264-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2010-12-16 857-264-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2010-12-03 857-203-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E JAMAICA PL MA
2010-12-03 857-228-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WATERTOWN MA
2010-11-24 857-444-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2010-11-24 857-444-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2010-11-24 857-444-2XXX 2000–2999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2010-11-24 857-444-3XXX 3000–3999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2010-11-24 857-444-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2010-11-24 857-444-5XXX 5000–5999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2010-11-24 857-444-6XXX 6000–6999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2010-11-24 857-444-7XXX 7000–7999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2010-11-24 857-444-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2010-11-24 857-444-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2010-11-09 857-333-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2010-11-05 857-400-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON 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.