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
2011-05-27 513-306-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-27 513-306-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-27 513-306-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-27 513-306-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-27 513-356-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-27 513-356-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-27 513-356-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-27 513-356-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-27 513-356-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-26 513-301-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-26 513-301-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-26 513-301-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-26 513-301-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-05-24 513-301-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F CINCINNATI OH
2011-05-20 513-222-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-05-20 513-222-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-05-20 513-222-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-05-20 513-222-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-05-20 513-222-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-05-20 513-222-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-05-20 513-222-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-05-20 513-222-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-05-20 513-222-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-05-20 513-222-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-05-20 513-273-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F OXFORD OH
2011-05-12 513-858-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMILTON OH
2011-04-21 513-409-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F LEBANON OH
2011-04-21 513-461-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F OXFORD OH
2011-04-20 513-202-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F HARRISON OH
2011-04-20 513-214-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F CINCINNATI OH
2011-04-20 513-214-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F CINCINNATI OH
2011-04-20 513-301-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F CINCINNATI OH
2011-04-20 513-301-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F CINCINNATI OH
2011-04-20 513-900-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F LTL MIAMI OH
2011-04-20 513-900-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F LTL MIAMI OH
2011-04-06 513-214-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-04-06 513-214-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-04-06 513-214-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-04-06 513-214-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-04-06 513-214-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-04-06 513-214-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-04-06 513-635-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-04-06 513-635-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-04-06 513-635-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-04-06 513-635-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-30 513-301-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-03-18 513-635-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-18 513-635-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-18 513-635-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-03-18 513-635-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI 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.