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
2006-12-05 513-557-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-30 513-252-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-30 513-253-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-30 513-258-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-30 513-258-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-30 513-259-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-30 513-283-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-30 513-348-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-30 513-392-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 MIDDLETOWN OH
2006-11-30 513-410-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-11-30 513-410-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-11-30 513-410-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-11-30 513-410-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-11-30 513-410-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-11-30 513-593-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OXFORD OH
2006-11-30 513-612-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-30 513-878-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-30 513-878-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-30 513-924-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-11-28 513-899-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K MORROW OH
2006-11-20 513-393-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MIDDLETOWN OH
2006-11-20 513-393-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MIDDLETOWN OH
2006-11-20 513-876-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K FELICITY OH
2006-11-17 513-668-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMILTON OH
2006-11-14 513-204-2XXX 2000–2999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MASON OH
2006-11-14 513-257-0XXX 0000–0999Assigned ONVOY, LLC - OH 464C CINCINNATI OH
2006-11-13 513-488-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-11-13 513-612-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-11-13 513-765-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-11-13 513-765-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-11-08 513-488-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J CINCINNATI OH
2006-11-07 513-878-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2006-11-07 513-878-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2006-11-07 513-878-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2006-11-07 513-878-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2006-11-07 513-878-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2006-11-07 513-878-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2006-11-02 513-386-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-02 513-487-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-02 513-487-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-02 513-487-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-02 513-546-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-02 513-551-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-02 513-551-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-02 513-557-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-02 513-557-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-02 513-591-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-02 513-591-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2006-11-01 513-767-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWTONSVL OH
2006-10-27 513-468-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K TRENTON 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.