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
2006-10-24 513-642-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 HAMILTON OH
2006-10-19 513-360-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K MONROE OH
2006-10-18 513-217-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K MIDDLETOWN OH
2006-10-18 513-239-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 LTL MIAMI OH
2006-10-13 513-855-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K WAYNESVL OH
2006-10-10 513-833-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTL MIAMI OH
2006-10-04 513-280-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K OXFORD OH
2006-10-04 513-291-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K SEVEN MILE OH
2006-10-04 513-340-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K LTL MIAMI OH
2006-10-04 513-376-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2006-10-04 513-376-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2006-10-04 513-376-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2006-10-04 513-376-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2006-10-04 513-386-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2006-10-04 513-386-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2006-10-04 513-386-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2006-10-04 513-456-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K NEWTONSVL OH
2006-10-04 513-480-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K SO LEBANON OH
2006-10-04 513-492-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K MASON OH
2006-10-04 513-836-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K LEBANON OH
2006-10-04 513-843-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K CLERMONT OH
2006-10-04 513-845-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K HARRISON OH
2006-10-04 513-847-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K BETHANY OH
2006-10-04 513-889-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K HAMILTON OH
2006-10-04 513-889-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K HAMILTON OH
2006-10-02 513-488-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-10-02 513-488-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-10-02 513-488-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-10-02 513-488-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-10-02 513-488-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-10-02 513-488-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-09-26 513-234-3XXX 3000–3999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MASON OH
2006-09-18 513-536-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K WILLIAMSBG OH
2006-09-18 513-717-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K SHANDON OH
2006-09-13 513-427-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K BETHEL OH
2006-09-13 513-898-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J CINCINNATI OH
2006-09-13 513-979-7XXX 7000–7999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-09-13 513-979-8XXX 8000–8999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-09-13 513-979-9XXX 9000–9999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-09-12 513-698-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2006-09-12 513-766-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2006-09-12 513-898-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2006-09-01 513-393-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MIDDLETOWN OH
2006-08-25 513-766-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CINCINNATI OH
2006-08-25 513-766-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CINCINNATI OH
2006-08-25 513-878-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CINCINNATI OH
2006-08-23 513-924-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CINCINNATI OH
2006-08-23 513-924-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CINCINNATI OH
2006-08-17 513-273-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 OXFORD OH
2006-08-17 513-827-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 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.