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
2019-10-21 857-557-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D BOSTON MA
2019-10-14 857-356-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2019-10-14 857-356-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2019-10-14 857-356-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2019-10-14 857-356-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2019-10-14 857-356-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2019-10-09 857-410-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2019-10-09 857-410-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2019-10-08 857-355-1XXX 1000–1999Assigned AIRUS, INC. - MA 428H EVERETT MA
2019-09-19 857-298-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2019-09-19 857-298-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2019-09-18 857-290-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWTON MA
2019-09-18 857-344-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2019-09-18 857-344-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2019-09-13 857-423-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2019-09-13 857-437-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2019-09-13 857-437-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2019-09-12 857-335-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-09-12 857-343-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-09-12 857-343-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-09-12 857-343-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-09-12 857-343-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-09-12 857-354-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-09-10 857-424-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2019-09-09 857-335-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2019-08-28 857-557-9XXX 9000–9999Assigned HD CARRIER LLC 321J BOSTON MA
2019-08-20 857-354-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2019-08-20 857-354-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2019-08-20 857-361-0XXX 0000–0999Assigned TELNYX LLC 073H BROOKLINE MA
2019-08-07 857-354-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2019-07-29 857-344-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2019-07-08 857-328-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-07-08 857-328-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-07-08 857-328-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-07-08 857-328-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-07-08 857-328-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-07-08 857-328-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-07-08 857-335-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2019-06-28 857-341-2XXX 2000–2999Assigned VOIP INNOVATIONS, LLC 597F BELMONT MA
2019-06-26 857-328-1XXX 1000–1999Assigned VOIP INNOVATIONS, LLC 597F BOSTON MA
2019-06-12 857-322-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EASTBOSTON MA
2019-06-12 857-728-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E JAMAICA PL MA
2019-06-06 857-335-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J BOSTON MA
2019-06-03 857-297-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D NEWTON MA
2019-06-03 857-297-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D NEWTON MA
2019-06-03 857-424-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D ROXBURY MA
2019-06-03 857-424-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D ROXBURY MA
2019-05-01 857-322-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EASTBOSTON MA
2019-05-01 857-773-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E JAMAICA PL MA
2019-04-17 857-349-8XXX 8000–8999Assigned TELNYX LLC 073H WINTHROP 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.