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
2015-11-24 857-880-8XXX 8000–8999Assigned BARR TELL USA, INC. - MA 732H BOSTON MA
2015-11-19 857-990-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2015-11-19 857-990-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2015-11-17 857-406-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-17 857-406-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-17 857-406-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-17 857-406-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-17 857-406-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-17 857-406-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-11-06 857-337-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BROOKLINE MA
2015-11-06 857-337-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BROOKLINE MA
2015-11-06 857-407-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F ROXBURY MA
2015-11-06 857-504-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2015-11-05 857-990-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2015-11-04 857-282-0XXX 0000–0999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2015-11-04 857-282-1XXX 1000–1999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2015-11-04 857-282-2XXX 2000–2999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2015-11-04 857-282-3XXX 3000–3999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2015-11-04 857-282-4XXX 4000–4999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2015-11-04 857-282-5XXX 5000–5999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2015-11-04 857-282-6XXX 6000–6999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2015-11-04 857-282-7XXX 7000–7999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2015-11-04 857-282-8XXX 8000–8999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2015-11-04 857-282-9XXX 9000–9999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2015-10-29 857-316-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MA
2015-10-29 857-316-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRIGHTON MA
2015-10-29 857-504-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2015-10-14 857-316-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2015-10-14 857-407-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F ROXBURY MA
2015-10-14 857-504-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2015-10-08 857-337-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BROOKLINE MA
2015-10-08 857-360-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-10-01 857-972-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-10-01 857-972-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-09-24 857-499-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
2015-09-23 857-990-0XXX 0000–0999Assigned EVOLVE CELLULAR, INC. 139F BOSTON MA
2015-09-10 857-309-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DORCHESTER MA
2015-09-04 857-262-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-09-04 857-262-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-09-04 857-262-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-09-04 857-262-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-09-04 857-262-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-09-04 857-262-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-09-02 857-972-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-09-02 857-972-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-09-02 857-972-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-09-02 857-972-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2015-08-24 857-216-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E NEWTON MA
2015-08-24 857-728-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E JAMAICA PL MA
2015-08-20 857-309-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DORCHESTER 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.