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
2010-11-03 857-264-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2010-10-18 857-293-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EASTBOSTON MA
2010-10-12 857-264-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2010-10-12 857-264-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2010-10-08 857-300-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2010-09-10 857-239-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2010-09-10 857-239-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2010-09-09 857-284-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2010-09-03 857-496-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J SO BOSTON MA
2010-08-26 857-209-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2010-08-19 857-203-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMAICA PL MA
2010-08-11 857-209-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2010-07-20 857-829-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2010-07-09 857-919-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2010-07-01 857-209-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2010-06-28 857-258-0XXX 0000–0999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-28 857-258-1XXX 1000–1999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-28 857-258-2XXX 2000–2999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-28 857-258-3XXX 3000–3999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-28 857-258-4XXX 4000–4999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-28 857-258-5XXX 5000–5999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-28 857-258-6XXX 6000–6999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-28 857-258-7XXX 7000–7999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-28 857-258-8XXX 8000–8999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-28 857-258-9XXX 9000–9999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-10 857-266-0XXX 0000–0999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-10 857-266-1XXX 1000–1999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-10 857-266-2XXX 2000–2999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-10 857-266-3XXX 3000–3999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-10 857-266-4XXX 4000–4999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-10 857-266-5XXX 5000–5999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-10 857-266-6XXX 6000–6999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-10 857-266-7XXX 7000–7999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-10 857-266-8XXX 8000–8999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-10 857-266-9XXX 9000–9999Assigned METROPCS, INC. 5562 BOSTON MA
2010-06-04 857-574-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EASTBOSTON MA
2010-06-02 857-253-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2010-06-02 857-756-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2010-06-02 857-756-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2010-06-02 857-756-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2010-06-01 857-239-3XXX 3000–3999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2010-06-01 857-239-4XXX 4000–4999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2010-06-01 857-239-6XXX 6000–6999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2010-05-27 857-203-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E JAMAICA PL MA
2010-05-27 857-239-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-05-27 857-243-1XXX 1000–1999Assigned METROPCS, INC. 5562 BOSTON MA
2010-05-27 857-243-3XXX 3000–3999Assigned METROPCS, INC. 5562 BOSTON MA
2010-05-27 857-243-4XXX 4000–4999Assigned METROPCS, INC. 5562 BOSTON MA
2010-05-27 857-243-5XXX 5000–5999Assigned METROPCS, INC. 5562 BOSTON MA
2010-05-27 857-243-7XXX 7000–7999Assigned METROPCS, INC. 5562 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.