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
2012-03-09 857-219-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D NEWTON MA
2012-03-09 857-219-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D NEWTON MA
2012-03-09 857-219-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D NEWTON MA
2012-03-09 857-219-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D NEWTON MA
2012-03-09 857-219-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D NEWTON MA
2012-03-09 857-219-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D NEWTON MA
2012-03-09 857-219-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D NEWTON MA
2012-03-09 857-219-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D NEWTON MA
2012-03-09 857-219-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D NEWTON MA
2012-03-08 857-248-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-03-08 857-248-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-03-08 857-260-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-03-07 857-777-7XXX 7000–7999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CAMBRIDGE MA
2012-02-29 857-240-3XXX 3000–3999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F NEWTON MA
2012-02-29 857-598-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MILTON MA
2012-02-08 857-208-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-02-03 857-202-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-02-03 857-202-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-01-19 857-230-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2012-01-19 857-230-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2012-01-19 857-230-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2011-12-07 857-214-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2011-12-06 857-321-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2011-12-01 857-202-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2011-12-01 857-202-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2011-12-01 857-202-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2011-12-01 857-202-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2011-11-29 857-230-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2011-11-29 857-230-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2011-11-21 857-217-5XXX 5000–5999Assigned METROPCS, INC. 5562 DORCHESTER MA
2011-11-21 857-217-6XXX 6000–6999Assigned METROPCS, INC. 5562 DORCHESTER MA
2011-11-21 857-217-7XXX 7000–7999Assigned METROPCS, INC. 5562 DORCHESTER MA
2011-11-21 857-217-8XXX 8000–8999Assigned METROPCS, INC. 5562 DORCHESTER MA
2011-11-17 857-206-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2011-11-16 857-206-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2011-11-16 857-206-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2011-11-16 857-206-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2011-11-16 857-206-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2011-11-16 857-242-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAMBRIDGE MA
2011-11-16 857-400-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2011-11-16 857-400-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2011-11-11 857-202-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2011-11-11 857-403-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J QUINCY MA
2011-11-09 857-200-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2011-11-09 857-200-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2011-11-09 857-206-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2011-11-04 857-500-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CAMBRIDGE MA
2011-11-02 857-400-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2011-10-14 857-200-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2011-10-14 857-200-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 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.