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
2020-05-26 617-362-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D HYDE PARK MA
2020-05-26 617-668-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D WATERTOWN MA
2020-05-26 617-676-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D JAMAICA PL MA
2020-05-26 617-741-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2020-05-26 617-741-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2020-05-26 617-741-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2020-05-26 617-798-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2020-05-26 617-958-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D CHELSEA MA
2020-05-08 617-766-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D SO BOSTON MA
2020-05-08 617-766-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D SO BOSTON MA
2020-05-08 617-915-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D MILTON MA
2020-05-08 617-915-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D MILTON MA
2020-05-08 617-915-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D MILTON MA
2020-04-28 617-741-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SOMERVILLE MA
2020-03-26 617-297-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DORCHESTER MA
2020-03-26 617-297-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DORCHESTER MA
2020-03-19 617-837-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
2020-03-16 617-765-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SO BOSTON MA
2020-03-09 617-380-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D CHARLESTN MA
2020-03-09 617-380-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D CHARLESTN MA
2020-03-09 617-468-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2020-03-09 617-468-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2020-03-09 617-826-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D BELMONT MA
2020-03-09 617-925-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D BRIGHTON MA
2020-03-09 617-958-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D CHELSEA MA
2020-03-09 617-958-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D CHELSEA MA
2020-03-09 617-958-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D CHELSEA MA
2020-03-09 617-958-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D CHELSEA MA
2020-03-03 617-380-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLESTN MA
2020-02-25 617-655-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2020-02-14 617-655-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D BOSTON MA
2020-01-14 617-668-2XXX 2000–2999Assigned TC SYSTEMS, INC. 7135 WATERTOWN MA
2019-12-16 617-798-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CAMBRIDGE MA
2019-12-05 617-546-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D NEWTON MA
2019-12-05 617-644-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D NEWTON MA
2019-12-05 617-675-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D HYDE PARK MA
2019-12-05 617-675-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D HYDE PARK MA
2019-12-05 617-675-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D HYDE PARK MA
2019-12-05 617-882-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D NEWTON MA
2019-11-19 617-845-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2019-11-19 617-845-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2019-11-12 617-397-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2019-11-12 617-397-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2019-11-12 617-397-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2019-11-12 617-397-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2019-11-12 617-665-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2019-10-29 617-865-7XXX 7000–7999Assigned INTRADO COMMUNICATIONS, LLC 116E BOSTON MA
2019-10-23 617-668-7XXX 7000–7999Assigned TC SYSTEMS, INC. 7135 WATERTOWN MA
2019-10-23 617-668-8XXX 8000–8999Assigned TC SYSTEMS, INC. 7135 WATERTOWN MA
2019-10-23 617-685-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CAMBRIDGE 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.