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
2014-04-11 857-225-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2014-04-11 857-245-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2014-04-11 857-364-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2014-04-11 857-377-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-04-11 857-377-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-04-11 857-377-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-04-11 857-377-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-04-11 857-377-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-04-11 857-377-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-04-11 857-377-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-04-11 857-377-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-04-11 857-377-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-04-11 857-377-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-04-07 857-305-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-03-28 857-500-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CAMBRIDGE MA
2014-03-27 857-218-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BROOKLINE MA
2014-03-27 857-218-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BROOKLINE MA
2014-03-27 857-271-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DORCHESTER MA
2014-03-27 857-271-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DORCHESTER MA
2014-03-27 857-523-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOMERVILLE MA
2014-03-27 857-523-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOMERVILLE MA
2014-03-26 857-303-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-03-26 857-303-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-03-26 857-303-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-03-26 857-303-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-03-26 857-366-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-03-26 857-383-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-03-26 857-383-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-03-26 857-400-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-03-26 857-445-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-03-26 857-488-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-03-25 857-201-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WINTHROP MA
2014-03-25 857-256-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J EASTBOSTON MA
2014-03-25 857-267-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MILTON MA
2014-03-25 857-271-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DORCHESTER MA
2014-03-25 857-304-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WATERTOWN MA
2014-03-25 857-401-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SO BOSTON MA
2014-03-21 857-702-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-03-21 857-702-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-03-21 857-702-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-03-21 857-702-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-03-21 857-702-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2014-03-19 857-317-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2014-03-03 857-201-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WINTHROP MA
2014-03-03 857-273-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E JAMAICA PL MA
2014-03-03 857-273-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E JAMAICA PL MA
2014-02-28 857-701-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J ROXBURY MA
2014-02-20 857-228-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WATERTOWN MA
2014-02-20 857-228-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WATERTOWN MA
2014-02-10 857-702-1XXX 1000–1999Assigned NUSO, LLC 551G 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.