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
2008-07-15 513-206-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2008-07-15 513-206-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2008-07-15 513-206-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2008-07-15 513-206-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2008-07-15 513-285-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HAMILTON OH
2008-07-07 513-206-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2008-07-07 513-748-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2008-07-07 513-748-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2008-07-07 513-748-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2008-06-24 513-488-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2008-06-19 513-846-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2008-06-19 513-846-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2008-05-23 513-436-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WILLIAMSBG OH
2008-05-22 513-330-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K HAMILTON OH
2008-05-13 513-549-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F CINCINNATI OH
2008-05-07 513-206-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2008-05-05 513-323-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 SHANDON OH
2008-05-05 513-718-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLERMONT OH
2008-05-05 513-718-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLERMONT OH
2008-05-05 513-718-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLERMONT OH
2008-05-01 513-206-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CINCINNATI OH
2008-04-16 513-278-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BETHEL OH
2008-04-16 513-280-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 OXFORD OH
2008-04-16 513-294-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWTONSVL OH
2008-04-16 513-299-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SEVEN MILE OH
2008-04-16 513-452-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HARRISON OH
2008-04-16 513-453-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LTL MIAMI OH
2008-04-16 513-785-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HAMILTON OH
2008-03-24 513-445-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MASON OH
2008-03-18 513-593-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OXFORD OH
2008-03-18 513-847-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K BETHANY OH
2008-03-11 513-280-5XXX 5000–5999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B OXFORD OH
2008-02-20 513-239-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K LTL MIAMI OH
2008-02-20 513-372-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J CINCINNATI OH
2008-02-08 513-273-2XXX 2000–2999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B OXFORD OH
2008-02-08 513-273-8XXX 8000–8999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B OXFORD OH
2008-01-31 513-318-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MIDDLETOWN OH
2008-01-31 513-318-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MIDDLETOWN OH
2008-01-25 513-204-6XXX 6000–6999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MASON OH
2008-01-23 513-834-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2008-01-23 513-834-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2008-01-23 513-834-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2008-01-23 513-834-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2008-01-21 513-331-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LEBANON OH
2008-01-18 513-217-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MIDDLETOWN OH
2008-01-18 513-442-0XXX 0000–0999Assigned ONVOY, LLC - OH 464C CINCINNATI OH
2008-01-18 513-442-2XXX 2000–2999Assigned ONVOY, LLC - OH 464C CINCINNATI OH
2008-01-11 513-628-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2008-01-11 513-628-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2008-01-11 513-628-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 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.