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
2016-02-02 857-363-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J EVERETT MA
2016-02-02 857-587-7XXX 7000–7999Assigned HD CARRIER LLC 321J DORCHESTER MA
2016-02-01 857-274-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2016-02-01 857-274-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2016-02-01 857-274-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2016-02-01 857-274-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2016-02-01 857-274-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2016-02-01 857-279-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2016-01-29 857-323-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D CHELSEA MA
2016-01-29 857-776-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D CHELSEA MA
2016-01-28 857-256-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D EASTBOSTON MA
2016-01-28 857-256-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D EASTBOSTON MA
2016-01-26 857-226-7XXX 7000–7999Assigned HD CARRIER LLC 321J NEWTON MA
2016-01-26 857-407-2XXX 2000–2999Assigned HD CARRIER LLC 321J ROXBURY MA
2016-01-26 857-504-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2016-01-26 857-504-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2016-01-26 857-990-7XXX 7000–7999Assigned HD CARRIER LLC 321J BOSTON MA
2016-01-25 857-504-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2016-01-25 857-856-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2016-01-25 857-856-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2016-01-25 857-856-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2016-01-20 857-504-4XXX 4000–4999Assigned METROPCS, INC. 5562 BOSTON MA
2016-01-20 857-504-5XXX 5000–5999Assigned METROPCS, INC. 5562 BOSTON MA
2016-01-19 857-626-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D BELMONT MA
2016-01-14 857-626-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D BELMONT MA
2015-12-18 857-499-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
2015-12-16 857-337-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D BROOKLINE MA
2015-12-11 857-990-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2015-12-11 857-990-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2015-12-11 857-990-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2015-12-11 857-990-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D BOSTON MA
2015-12-03 857-337-3XXX 3000–3999Assigned BARR TELL USA, INC. - MA 732H BROOKLINE MA
2015-12-03 857-520-5XXX 5000–5999Assigned BARR TELL USA, INC. - MA 732H HYDE PARK MA
2015-12-02 857-226-6XXX 6000–6999Assigned BARR TELL USA, INC. - MA 732H NEWTON MA
2015-12-02 857-227-7XXX 7000–7999Assigned BARR TELL USA, INC. - MA 732H SOMERVILLE MA
2015-12-02 857-314-3XXX 3000–3999Assigned BARR TELL USA, INC. - MA 732H MILTON MA
2015-12-02 857-316-1XXX 1000–1999Assigned BARR TELL USA, INC. - MA 732H BRIGHTON MA
2015-12-02 857-323-4XXX 4000–4999Assigned BARR TELL USA, INC. - MA 732H CHELSEA MA
2015-12-02 857-402-2XXX 2000–2999Assigned BARR TELL USA, INC. - MA 732H EASTBOSTON MA
2015-12-02 857-407-7XXX 7000–7999Assigned BARR TELL USA, INC. - MA 732H ROXBURY MA
2015-12-02 857-499-9XXX 9000–9999Assigned BARR TELL USA, INC. - MA 732H QUINCY MA
2015-12-02 857-757-2XXX 2000–2999Assigned BARR TELL USA, INC. - MA 732H CAMBRIDGE MA
2015-11-30 857-408-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-30 857-408-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-30 857-408-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-30 857-408-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-30 857-408-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-30 857-408-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-30 857-408-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-30 857-408-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON 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.