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
2020-12-03 857-437-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D ROXBURY MA
2020-12-03 857-877-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D BRIGHTON MA
2020-12-03 857-877-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D BRIGHTON MA
2020-12-03 857-877-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D BRIGHTON MA
2020-12-03 857-877-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BRIGHTON MA
2020-11-19 857-755-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-11-19 857-755-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-11-19 857-755-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-11-19 857-755-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-11-19 857-755-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-11-06 857-340-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2020-11-06 857-340-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2020-10-12 857-227-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SOMERVILLE MA
2020-10-12 857-578-5XXX 5000–5999Assigned TWILIO INTERNATIONAL, INC. 506J NEWTON MA
2020-10-05 857-367-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 WATERTOWN MA
2020-10-01 857-340-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2020-09-28 857-877-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BRIGHTON MA
2020-09-08 857-755-5XXX 5000–5999Assigned FRACTEL, LLC 965H QUINCY MA
2020-09-03 857-365-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BOSTON MA
2020-09-03 857-465-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D BOSTON MA
2020-09-03 857-465-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D BOSTON MA
2020-09-03 857-465-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D BOSTON MA
2020-09-03 857-465-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BOSTON MA
2020-09-03 857-557-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D BOSTON MA
2020-08-20 857-281-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-08-20 857-281-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-08-20 857-281-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-08-20 857-281-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-08-20 857-281-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-08-20 857-281-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-08-20 857-281-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-08-20 857-281-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-08-20 857-281-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-08-20 857-281-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-07-27 857-322-3XXX 3000–3999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EASTBOSTON MA
2020-07-27 857-524-7XXX 7000–7999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SO BOSTON MA
2020-07-23 857-423-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2020-07-22 857-766-3XXX 3000–3999Assigned FRACTEL, LLC 965H SO BOSTON MA
2020-07-22 857-766-6XXX 6000–6999Assigned FRACTEL, LLC 965H SO BOSTON MA
2020-07-21 857-358-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-07-21 857-358-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-07-21 857-358-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-07-21 857-359-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-06-25 857-437-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROXBURY MA
2020-06-24 857-298-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H CAMBRIDGE MA
2020-06-24 857-298-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CAMBRIDGE MA
2020-06-24 857-298-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CAMBRIDGE MA
2020-06-19 857-349-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D WINTHROP MA
2020-06-01 857-365-1XXX 1000–1999Assigned NUSO, LLC 478J BOSTON MA
2020-05-29 857-837-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D CHARLESTN 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.