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
2005-02-14 513-346-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-373-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-373-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-373-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-373-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-373-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-373-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-373-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-373-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-373-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-01-24 513-268-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SO LEBANON OH
2005-01-24 513-392-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MIDDLETOWN OH
2005-01-24 513-685-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLERMONT OH
2005-01-20 513-551-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-01-19 513-204-3XXX 3000–3999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MASON OH
2005-01-04 513-268-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SO LEBANON OH
2005-01-04 513-437-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SEVEN MILE OH
2004-12-30 513-282-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LEBANON OH
2004-12-28 513-217-2XXX 2000–2999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MIDDLETOWN OH
2004-12-28 513-275-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HAMILTON OH
2004-12-28 513-334-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LTL MIAMI OH
2004-12-28 513-770-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MASON OH
2004-11-11 513-257-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2004-11-11 513-437-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SEVEN MILE OH
2004-11-05 513-283-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2004-11-02 513-204-4XXX 4000–4999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MASON OH
2004-10-21 513-337-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2004-10-21 513-337-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2004-10-20 513-277-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-10-20 513-277-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-10-20 513-332-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-10-20 513-332-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-10-20 513-332-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-10-20 513-332-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-10-20 513-332-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-10-20 513-332-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-10-20 513-332-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-10-20 513-332-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-10-18 513-327-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WILLIAMSBG OH
2004-10-14 513-277-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2004-10-11 513-898-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2004-09-28 513-282-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LEBANON OH
2004-09-28 513-456-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWTONSVL OH
2004-09-28 513-715-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HARRISON OH
2004-09-27 513-342-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BETHANY OH
2004-09-27 513-457-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BETHEL OH
2004-09-14 513-217-6XXX 6000–6999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MIDDLETOWN OH
2004-09-03 513-280-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 OXFORD OH
2004-09-03 513-360-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 MONROE OH
2004-09-03 513-988-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 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.