NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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, all time — NPA 351
ONVOY, LLC - MA 285
OMNIPOINT MIAMI E LICENSE, LLC 83
ONVOY SPECTRUM, LLC 74
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 40
PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 37
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
2021-11-08 351-355-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E AMESBURY MA
2021-11-08 351-361-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E ASHBY MA
2021-11-04 351-221-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F LOWELL MA
2021-11-03 351-234-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAVERHILL MA
2021-11-03 351-234-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAVERHILL MA
2021-11-02 351-210-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H HUDSON MA
2021-11-02 351-212-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H DANVERS MA
2021-11-02 351-212-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H DANVERS MA
2021-11-02 351-251-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H GROTON MA
2021-11-02 351-251-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H GROTON MA
2021-11-02 351-345-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H HUDSON MA
2021-11-02 351-357-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H ORANGE MA
2021-11-02 351-357-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H ORANGE MA
2021-11-02 351-358-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H PEPPERELL MA
2021-11-02 351-667-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H ACTON MA
2021-11-02 351-667-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H ACTON MA
2021-10-25 351-354-0XXX 0000–0999Assigned TELNYX LLC 073H LUNENBURG MA
2021-10-22 351-667-8XXX 8000–8999Assigned FRACTEL, LLC 965H ACTON MA
2021-10-21 351-225-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BERLIN MA
2021-10-21 351-225-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BERLIN MA
2021-10-21 351-234-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H HAVERHILL MA
2021-10-21 351-234-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H HAVERHILL MA
2021-10-21 351-252-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H ROWLEY MA
2021-10-21 351-252-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H ROWLEY MA
2021-10-21 351-359-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H SHIRLEY MA
2021-10-21 351-359-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SHIRLEY MA
2021-10-19 351-226-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTFORD MA
2021-10-18 351-900-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D IPSWICH MA
2021-09-24 351-357-1XXX 1000–1999Assigned METROPCS, INC. 5562 ORANGE MA
2021-09-17 351-221-0XXX 0000–0999Assigned COMMIO, LLC 939H LOWELL MA
2021-09-17 351-221-1XXX 1000–1999Assigned COMMIO, LLC 939H LOWELL MA
2021-09-17 351-221-2XXX 2000–2999Assigned COMMIO, LLC 939H LOWELL MA
2021-09-16 351-213-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 TEMPLETON MA
2021-09-16 351-371-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 WESTMINSTR MA
2021-09-09 351-219-0XXX 0000–0999Assigned COMMIO, LLC 939H DANVERS MA
2021-09-09 351-219-8XXX 8000–8999Assigned COMMIO, LLC 939H DANVERS MA
2021-09-09 351-219-9XXX 9000–9999Assigned COMMIO, LLC 939H DANVERS MA
2021-09-09 351-361-4XXX 4000–4999Assigned COMMIO, LLC 939H ASHBY MA
2021-09-09 351-361-8XXX 8000–8999Assigned COMMIO, LLC 939H ASHBY MA
2021-09-09 351-361-9XXX 9000–9999Assigned COMMIO, LLC 939H ASHBY MA
2021-09-08 351-353-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F HAVERHILL MA
2021-09-02 351-204-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 LAWRENCE MA
2021-08-18 351-217-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J GLOUCESTER MA
2021-08-18 351-217-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J GLOUCESTER MA
2021-08-18 351-219-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J DANVERS MA
2021-08-18 351-219-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DANVERS MA
2021-08-17 351-223-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BEVERLY MA
2021-08-17 351-223-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J BEVERLY MA
2021-08-06 351-355-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E AMESBURY MA
2021-08-04 351-253-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ATHOLFKLN MA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.