NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 617
BANDWIDTH.COM CLEC, LLC - MA 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
2012-01-23 617-221-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2012-01-18 617-637-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMAICA PL MA
2012-01-18 617-637-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMAICA PL MA
2011-12-21 617-533-9XXX 9000–9999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DORCHESTER MA
2011-12-01 617-941-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SOMERVILLE MA
2011-11-29 617-363-6XXX 6000–6999Assigned METROPCS, INC. 5562 JAMAICA PL MA
2011-11-21 617-704-0XXX 0000–0999Assigned METROPCS, INC. 5562 DORCHESTER MA
2011-11-21 617-704-1XXX 1000–1999Assigned METROPCS, INC. 5562 DORCHESTER MA
2011-11-21 617-704-2XXX 2000–2999Assigned METROPCS, INC. 5562 DORCHESTER MA
2011-11-21 617-704-3XXX 3000–3999Assigned METROPCS, INC. 5562 DORCHESTER MA
2011-11-21 617-704-7XXX 7000–7999Assigned METROPCS, INC. 5562 DORCHESTER MA
2011-11-21 617-704-8XXX 8000–8999Assigned METROPCS, INC. 5562 DORCHESTER MA
2011-11-18 617-615-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J MILTON MA
2011-11-08 617-704-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J DORCHESTER MA
2011-10-26 617-600-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WATERTOWN MA
2011-10-19 617-553-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 JAMAICA PL MA
2011-10-19 617-637-0XXX 0000–0999Assigned METROPCS, INC. 5562 JAMAICA PL MA
2011-10-19 617-637-1XXX 1000–1999Assigned METROPCS, INC. 5562 JAMAICA PL MA
2011-10-19 617-637-2XXX 2000–2999Assigned METROPCS, INC. 5562 JAMAICA PL MA
2011-10-19 617-637-7XXX 7000–7999Assigned METROPCS, INC. 5562 JAMAICA PL MA
2011-10-19 617-637-8XXX 8000–8999Assigned METROPCS, INC. 5562 JAMAICA PL MA
2011-10-19 617-637-9XXX 9000–9999Assigned METROPCS, INC. 5562 JAMAICA PL MA
2011-10-03 617-766-3XXX 3000–3999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SO BOSTON MA
2011-10-03 617-766-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J SO BOSTON MA
2011-09-23 617-615-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MILTON MA
2011-09-23 617-615-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MILTON MA
2011-09-21 617-477-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMAICA PL MA
2011-09-21 617-971-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMAICA PL MA
2011-08-31 617-481-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2011-08-29 617-553-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J JAMAICA PL MA
2011-08-23 617-514-8XXX 8000–8999Assigned TC SYSTEMS, INC. 7135 DORCHESTER MA
2011-08-11 617-580-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHARLESTN MA
2011-08-10 617-993-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BELMONT MA
2011-08-03 617-206-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BRIGHTON MA
2011-08-03 617-544-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 EVERETT MA
2011-08-03 617-934-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 QUINCY MA
2011-08-02 617-539-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WINTHROP MA
2011-08-02 617-765-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SO BOSTON MA
2011-08-02 617-932-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2011-07-27 617-415-0XXX 0000–0999Assigned VERIZON NEW ENGLAND INC. 9102 BRIGHTON MA
2011-07-18 617-315-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SO BOSTON MA
2011-07-15 617-651-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2011-07-15 617-651-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2011-07-13 617-860-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BROOKLINE MA
2011-07-06 617-418-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2011-06-28 617-651-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2011-06-28 617-651-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2011-06-17 617-286-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CHARLESTN MA
2011-06-17 617-370-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CHELSEA MA
2011-06-17 617-410-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EVERETT 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.