NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2012-03-28 513-581-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-03-28 513-581-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-03-28 513-581-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-03-28 513-581-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-03-28 513-581-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-03-28 513-581-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-03-28 513-581-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-03-28 513-581-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-03-28 513-581-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-03-27 513-212-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F CINCINNATI OH
2012-03-27 513-512-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F CINCINNATI OH
2012-03-27 513-609-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F CINCINNATI OH
2012-03-19 513-795-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HAMILTON OH
2012-03-15 513-704-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-15 513-704-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-15 513-704-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-08 513-714-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K HAMILTON OH
2012-03-07 513-512-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-07 513-601-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-07 513-601-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-07 513-601-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-07 513-601-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-07 513-601-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-07 513-601-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-07 513-601-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-06 513-609-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-06 513-609-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-06 513-620-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-06 513-620-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-03-05 513-452-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F HARRISON OH
2012-03-05 513-452-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F HARRISON OH
2012-02-28 513-649-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K MIDDLETOWN OH
2012-02-22 513-716-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTL MIAMI OH
2012-02-17 513-900-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K LTL MIAMI OH
2012-02-16 513-510-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2012-02-16 513-510-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2012-02-16 513-512-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-02-16 513-512-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-02-16 513-512-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-02-16 513-512-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-02-16 513-512-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-02-16 513-512-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2012-02-16 513-847-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K BETHANY OH
2012-02-07 513-296-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F REILY OH
2012-02-07 513-370-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2012-02-01 513-409-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LEBANON OH
2012-02-01 513-516-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-02-01 513-516-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-02-01 513-516-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-02-01 513-516-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.