NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 513
BANDWIDTH.COM CLEC, LLC - OH 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
2011-03-18 513-635-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-18 513-635-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-17 513-301-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-03-14 513-214-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2011-03-14 513-214-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2011-03-08 513-334-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LTL MIAMI OH
2011-03-04 513-268-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F SO LEBANON OH
2011-03-04 513-299-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F SEVEN MILE OH
2011-03-04 513-427-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F BETHEL OH
2011-03-04 513-436-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F WILLIAMSBG OH
2011-03-04 513-456-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F NEWTONSVL OH
2011-03-03 513-568-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-03 513-568-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-03 513-568-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-03 513-568-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-03 513-568-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-03 513-568-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-03 513-568-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-03 513-888-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-03 513-888-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-02-28 513-568-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-28 513-568-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-28 513-568-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-24 513-888-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-24 513-888-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-24 513-888-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-24 513-888-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-24 513-888-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-24 513-888-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-24 513-888-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-24 513-888-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-18 513-836-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LEBANON OH
2011-02-18 513-836-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LEBANON OH
2011-02-18 513-836-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LEBANON OH
2011-02-18 513-836-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LEBANON OH
2011-02-14 513-644-0XXX 0000–0999Assigned CINCINNATI BELL 9348 BETHANY OH
2011-02-14 513-849-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MIDDLETOWN OH
2011-02-11 513-456-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F NEWTONSVL OH
2011-02-11 513-767-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWTONSVL OH
2011-02-11 513-800-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-02-11 513-800-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-02-11 513-800-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-02-11 513-800-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-02-10 513-299-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F SEVEN MILE OH
2011-02-10 513-436-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F WILLIAMSBG OH
2011-02-10 513-795-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HAMILTON OH
2011-02-10 513-900-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 LTL MIAMI OH
2011-02-10 513-900-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 LTL MIAMI OH
2011-02-10 513-900-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 LTL MIAMI OH
2011-02-10 513-900-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 LTL MIAMI OH

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.