NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2005-08-30 513-569-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CINCINNATI OH
2005-08-23 513-386-0XXX 0000–0999Assigned ONVOY, LLC - OH 464C CINCINNATI OH
2005-08-22 513-342-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BETHANY OH
2005-08-22 513-715-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HARRISON OH
2005-08-17 513-322-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2005-08-09 513-722-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTL MIAMI OH
2005-08-09 513-722-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTL MIAMI OH
2005-08-09 513-939-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HAMILTON OH
2005-08-09 513-939-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HAMILTON OH
2005-08-09 513-965-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTL MIAMI OH
2005-07-27 513-923-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-07-27 513-923-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-07-20 513-388-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-07-07 513-645-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 HAMILTON OH
2005-07-07 513-652-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-07-07 513-652-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-07-07 513-923-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-06-10 513-259-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-04-20 513-322-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2005-04-20 513-322-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2005-04-20 513-322-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2005-04-20 513-322-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2005-04-05 513-353-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CINCINNATI OH
2005-04-05 513-353-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CINCINNATI OH
2005-04-04 513-544-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-04-04 513-544-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-04-04 513-545-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-04-04 513-545-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-04-04 513-545-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-04-01 513-322-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2005-03-28 513-557-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-03-21 513-728-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-03-08 513-322-6XXX 6000–6999Assigned CITYNET OHIO, LLC - OH 036B CINCINNATI OH
2005-03-02 513-360-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MONROE OH
2005-03-02 513-988-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TRENTON OH
2005-02-28 513-285-2XXX 2000–2999Assigned METROPCS, INC. 5562 HAMILTON OH
2005-02-28 513-685-2XXX 2000–2999Assigned METROPCS, INC. 5562 CLERMONT OH
2005-02-18 513-897-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 WAYNESVL OH
2005-02-16 513-551-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-02-16 513-551-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-02-14 513-263-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-287-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-287-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-338-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-338-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-338-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-02-14 513-338-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-345-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-346-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2005-02-14 513-346-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.