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
2013-03-15 617-341-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D BOSTON MA
2013-03-15 617-360-5XXX 5000–5999Assigned IP HORIZON LLC 515J HYDE PARK MA
2013-03-15 617-370-7XXX 7000–7999Assigned IP HORIZON LLC 515J CHELSEA MA
2013-03-15 617-398-8XXX 8000–8999Assigned IP HORIZON LLC 515J CHARLESTN MA
2013-03-15 617-545-2XXX 2000–2999Assigned IP HORIZON LLC 515J EVERETT MA
2013-02-19 617-843-7XXX 7000–7999Assigned FREEDOM RING COMMUNICATIONS, LLC 8468 EVERETT MA
2013-02-19 617-982-1XXX 1000–1999Assigned IP HORIZON LLC 515J BOSTON MA
2013-01-30 617-514-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DORCHESTER MA
2013-01-30 617-514-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DORCHESTER MA
2013-01-30 617-925-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BRIGHTON MA
2013-01-30 617-936-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2013-01-23 617-207-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WINTHROP MA
2013-01-15 617-831-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J NEWTON MA
2013-01-14 617-505-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2013-01-14 617-505-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2013-01-14 617-652-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2013-01-14 617-652-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2013-01-10 617-936-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2013-01-10 617-936-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2013-01-09 617-936-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2013-01-09 617-936-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2013-01-08 617-936-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2013-01-08 617-936-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2013-01-07 617-238-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ROXBURY MA
2013-01-02 617-681-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLESTN MA
2013-01-02 617-681-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLESTN MA
2013-01-02 617-681-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLESTN MA
2013-01-02 617-906-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2013-01-02 617-906-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2013-01-02 617-906-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2013-01-02 617-935-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2012-12-27 617-659-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-12-27 617-659-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-12-27 617-659-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-12-21 617-433-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MILTON MA
2012-12-06 617-514-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DORCHESTER MA
2012-11-30 617-366-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-11-30 617-366-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-11-30 617-485-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-11-30 617-485-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-11-30 617-485-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-11-30 617-485-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-11-30 617-545-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EVERETT MA
2012-11-30 617-545-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EVERETT MA
2012-11-30 617-631-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-11-30 617-631-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-11-30 617-631-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-11-30 617-631-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-11-30 617-631-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-11-30 617-631-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON 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.