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
2004-08-24 513-437-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 SEVEN MILE OH
2004-08-18 513-282-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 LEBANON OH
2004-08-18 513-294-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 NEWTONSVL OH
2004-08-18 513-494-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 SO LEBANON OH
2004-08-18 513-898-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2004-08-16 513-283-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2004-08-16 513-283-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2004-08-06 513-245-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CINCINNATI OH
2004-07-19 513-283-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2004-07-13 513-277-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CINCINNATI OH
2004-07-07 513-261-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 MIDDLETOWN OH
2004-07-06 513-294-7XXX 7000–7999Assigned CITYNET OHIO, LLC - OH 036B NEWTONSVL OH
2004-06-29 513-291-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEVEN MILE OH
2004-06-29 513-291-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEVEN MILE OH
2004-06-23 513-360-2XXX 2000–2999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MONROE OH
2004-06-22 513-277-6XXX 6000–6999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2004-06-22 513-277-7XXX 7000–7999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2004-06-22 513-277-8XXX 8000–8999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2004-05-20 513-217-5XXX 5000–5999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MIDDLETOWN OH
2004-05-19 513-276-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-05-19 513-276-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2004-03-19 513-770-0XXX 0000–0999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MASON OH
2004-03-19 513-770-2XXX 2000–2999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MASON OH
2004-02-20 513-323-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 SHANDON OH
2004-02-20 513-685-7XXX 7000–7999Assigned CITYNET OHIO, LLC - OH 036B CLERMONT OH
2003-12-08 513-221-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2003-12-08 513-233-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-12-08 513-780-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-12-08 513-780-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-11-18 513-698-5XXX 5000–5999Assigned CINCINNATI BELL 9348 CINCINNATI OH
2003-11-04 513-217-4XXX 4000–4999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MIDDLETOWN OH
2003-11-04 513-360-0XXX 0000–0999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MONROE OH
2003-10-09 513-276-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2003-10-09 513-276-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2003-10-06 513-240-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-10-06 513-240-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-10-06 513-240-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-10-06 513-240-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-10-06 513-240-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-10-06 513-240-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-10-06 513-240-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-10-06 513-240-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-10-06 513-240-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2003-09-09 513-276-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2003-09-09 513-276-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2003-07-31 513-276-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2003-07-31 513-276-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2003-07-31 513-276-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2003-07-31 513-685-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLERMONT OH
2003-07-31 513-770-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MASON 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.