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
2021-10-21 857-388-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H SOMERVILLE MA
2021-10-21 857-388-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2021-10-20 857-392-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H JAMAICA PL MA
2021-10-20 857-392-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H JAMAICA PL MA
2021-10-19 857-375-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H DORCHESTER MA
2021-10-18 857-355-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D EVERETT MA
2021-10-18 857-995-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOMERVILLE MA
2021-10-13 857-706-7XXX 7000–7999Assigned LIGHTPATH OF NEW ENGLAND 814J CAMBRIDGE MA
2021-10-12 857-678-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D BELMONT MA
2021-10-12 857-867-7XXX 7000–7999Assigned VONAGE AMERICA LLC 197D BROOKLINE MA
2021-10-07 857-390-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-10-07 857-390-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-10-07 857-390-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-10-06 857-379-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2021-10-06 857-381-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-10-06 857-381-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-10-06 857-381-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-09-29 857-331-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2021-09-29 857-357-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2021-09-29 857-384-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2021-09-29 857-384-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2021-09-29 857-384-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2021-09-28 857-491-5XXX 5000–5999Assigned LIGHTPATH OF NEW ENGLAND 814J BOSTON MA
2021-09-27 857-388-0XXX 0000–0999Assigned COMMIO, LLC 939H SOMERVILLE MA
2021-09-27 857-388-1XXX 1000–1999Assigned COMMIO, LLC 939H SOMERVILLE MA
2021-09-27 857-388-2XXX 2000–2999Assigned COMMIO, LLC 939H SOMERVILLE MA
2021-09-23 857-491-6XXX 6000–6999Assigned LIGHTPATH OF NEW ENGLAND 814J BOSTON MA
2021-09-13 857-374-0XXX 0000–0999Assigned COMMIO, LLC 939H QUINCY MA
2021-09-13 857-374-1XXX 1000–1999Assigned COMMIO, LLC 939H QUINCY MA
2021-09-13 857-374-8XXX 8000–8999Assigned COMMIO, LLC 939H QUINCY MA
2021-09-13 857-374-9XXX 9000–9999Assigned COMMIO, LLC 939H QUINCY MA
2021-09-13 857-375-0XXX 0000–0999Assigned COMMIO, LLC 939H DORCHESTER MA
2021-09-13 857-375-1XXX 1000–1999Assigned COMMIO, LLC 939H DORCHESTER MA
2021-09-13 857-375-2XXX 2000–2999Assigned COMMIO, LLC 939H DORCHESTER MA
2021-09-13 857-375-3XXX 3000–3999Assigned COMMIO, LLC 939H DORCHESTER MA
2021-09-13 857-375-9XXX 9000–9999Assigned COMMIO, LLC 939H DORCHESTER MA
2021-09-13 857-379-1XXX 1000–1999Assigned COMMIO, LLC 939H ROXBURY MA
2021-09-13 857-379-2XXX 2000–2999Assigned COMMIO, LLC 939H ROXBURY MA
2021-09-13 857-379-8XXX 8000–8999Assigned COMMIO, LLC 939H ROXBURY MA
2021-09-13 857-379-9XXX 9000–9999Assigned COMMIO, LLC 939H ROXBURY MA
2021-09-13 857-382-0XXX 0000–0999Assigned TELNYX LLC 073H EASTBOSTON MA
2021-09-10 857-387-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2021-09-09 857-381-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-09-09 857-381-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-09-09 857-381-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-09-09 857-381-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-09-09 857-381-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-09-08 857-370-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-09-08 857-376-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-09-08 857-995-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SOMERVILLE 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.