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
2006-08-15 513-833-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTL MIAMI OH
2006-08-15 513-833-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTL MIAMI OH
2006-08-15 513-889-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HAMILTON OH
2006-08-07 513-234-1XXX 1000–1999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MASON OH
2006-08-07 513-234-2XXX 2000–2999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MASON OH
2006-08-02 513-407-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-08-02 513-407-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-08-02 513-407-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2006-07-26 513-536-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 WILLIAMSBG OH
2006-07-20 513-322-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-07-20 513-338-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-07-20 513-598-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-605-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-605-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-619-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-638-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-07-20 513-638-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-638-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-638-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-638-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-641-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-641-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-679-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-679-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-686-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-686-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-698-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2006-07-20 513-728-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-728-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-20 513-728-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2006-07-18 513-544-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-07-18 513-923-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-07-18 513-981-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-07-18 513-981-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-07-18 513-981-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-07-07 513-803-0XXX 0000–0999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-07-07 513-803-1XXX 1000–1999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-07-07 513-803-2XXX 2000–2999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-07-07 513-803-3XXX 3000–3999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-07-07 513-803-4XXX 4000–4999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-07-07 513-803-5XXX 5000–5999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-07-07 513-803-6XXX 6000–6999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-07-07 513-803-7XXX 7000–7999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-07-07 513-803-8XXX 8000–8999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-07-07 513-803-9XXX 9000–9999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2006-06-28 513-275-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 HAMILTON OH
2006-06-27 513-254-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-06-27 513-254-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2006-06-16 513-939-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HAMILTON OH
2006-06-09 513-726-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 SEVEN MILE 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.