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
2016-04-26 513-975-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2016-04-19 513-883-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMILTON OH
2016-04-19 513-883-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMILTON OH
2016-04-19 513-883-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMILTON OH
2016-04-19 513-987-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTL MIAMI OH
2016-04-06 513-466-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K MASON OH
2016-04-06 513-883-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K HAMILTON OH
2016-03-31 513-996-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2016-03-31 513-996-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2016-03-31 513-996-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2016-03-30 513-781-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTL MIAMI OH
2016-03-21 513-436-7XXX 7000–7999Assigned CITYNET OHIO, LLC - OH 036B WILLIAMSBG OH
2016-03-21 513-715-5XXX 5000–5999Assigned ONVOY, LLC - OH 464C HARRISON OH
2016-03-21 513-715-7XXX 7000–7999Assigned ONVOY, LLC - OH 464C HARRISON OH
2016-03-17 513-434-1XXX 1000–1999Assigned ONVOY, LLC - OH 464C REILY OH
2016-03-17 513-434-3XXX 3000–3999Assigned ONVOY, LLC - OH 464C REILY OH
2016-03-17 513-940-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWTONSVL OH
2016-03-15 513-472-2XXX 2000–2999Assigned ONVOY, LLC - OH 464C MORROW OH
2016-03-15 513-472-3XXX 3000–3999Assigned ONVOY, LLC - OH 464C MORROW OH
2016-03-15 513-901-3XXX 3000–3999Assigned ONVOY, LLC - OH 464C WILLIAMSBG OH
2016-03-15 513-901-4XXX 4000–4999Assigned ONVOY, LLC - OH 464C WILLIAMSBG OH
2016-03-14 513-717-7XXX 7000–7999Assigned ONVOY, LLC - OH 464C SHANDON OH
2016-03-14 513-717-8XXX 8000–8999Assigned ONVOY, LLC - OH 464C SHANDON OH
2016-03-14 513-855-8XXX 8000–8999Assigned ONVOY, LLC - OH 464C WAYNESVL OH
2016-03-14 513-855-9XXX 9000–9999Assigned ONVOY, LLC - OH 464C WAYNESVL OH
2016-03-14 513-974-0XXX 0000–0999Assigned OHIO BELL TEL CO 9321 MIDDLETOWN OH
2016-03-14 513-974-1XXX 1000–1999Assigned OHIO BELL TEL CO 9321 MIDDLETOWN OH
2016-03-14 513-974-2XXX 2000–2999Assigned OHIO BELL TEL CO 9321 MIDDLETOWN OH
2016-03-14 513-974-3XXX 3000–3999Assigned OHIO BELL TEL CO 9321 MIDDLETOWN OH
2016-03-14 513-974-4XXX 4000–4999Assigned OHIO BELL TEL CO 9321 MIDDLETOWN OH
2016-03-14 513-974-5XXX 5000–5999Assigned OHIO BELL TEL CO 9321 MIDDLETOWN OH
2016-03-14 513-974-6XXX 6000–6999Assigned OHIO BELL TEL CO 9321 MIDDLETOWN OH
2016-03-14 513-974-7XXX 7000–7999Assigned OHIO BELL TEL CO 9321 MIDDLETOWN OH
2016-03-14 513-974-8XXX 8000–8999Assigned OHIO BELL TEL CO 9321 MIDDLETOWN OH
2016-03-14 513-974-9XXX 9000–9999Assigned OHIO BELL TEL CO 9321 MIDDLETOWN OH
2016-03-03 513-906-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2016-03-03 513-997-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K MIDDLETOWN OH
2016-03-02 513-457-6XXX 6000–6999Assigned ONVOY, LLC - OH 464C BETHEL OH
2016-03-02 513-494-7XXX 7000–7999Assigned ONVOY, LLC - OH 464C SO LEBANON OH
2016-03-02 513-494-8XXX 8000–8999Assigned ONVOY, LLC - OH 464C SO LEBANON OH
2016-03-02 513-734-5XXX 5000–5999Assigned ONVOY, LLC - OH 464C BETHEL OH
2016-03-02 513-940-4XXX 4000–4999Assigned ONVOY, LLC - OH 464C NEWTONSVL OH
2016-03-02 513-940-5XXX 5000–5999Assigned ONVOY, LLC - OH 464C NEWTONSVL OH
2016-03-02 513-982-7XXX 7000–7999Assigned ONVOY, LLC - OH 464C SEVEN MILE OH
2016-03-02 513-982-8XXX 8000–8999Assigned ONVOY, LLC - OH 464C SEVEN MILE OH
2016-03-01 513-466-0XXX 0000–0999Assigned ONVOY, LLC - OH 464C MASON OH
2016-03-01 513-466-1XXX 1000–1999Assigned ONVOY, LLC - OH 464C MASON OH
2016-02-25 513-970-6XXX 6000–6999Assigned ONVOY, LLC - OH 464C LEBANON OH
2016-02-25 513-970-9XXX 9000–9999Assigned ONVOY, LLC - OH 464C LEBANON OH
2016-02-24 513-847-2XXX 2000–2999Assigned ONVOY, LLC - OH 464C BETHANY 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.