NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

5 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 937
PEERLESS NETWORK OF OHIO, LLC - OH 2
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
TELNYX LLC 1
AHOI LLC 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
2005-03-15 937-528-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DAYTON OH
2005-03-15 937-568-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SO VIENNA OH
2005-03-15 937-584-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SABINA OH
2005-03-15 937-685-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARTINSVL OH
2005-03-15 937-757-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WMANCHESTR OH
2005-03-15 937-783-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BLANCHESTR OH
2005-03-15 937-964-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NO HAMPTON OH
2005-03-15 937-969-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TREMONT CY OH
2005-03-11 937-697-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CEDARVILLE OH
2005-03-09 937-817-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CHRISTISBG OH
2005-03-08 937-780-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 LEESBURG OH
2005-02-28 937-887-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 W LIBERTY OH
2005-02-25 937-719-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WESTMILTON OH
2005-02-23 937-526-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 VERSAILLES OH
2005-02-18 937-489-8XXX 8000–8999Assigned AERIAL COMMUNICATIONS, INC. 6701 SIDNEY OH
2005-02-16 937-302-2XXX 2000–2999Assigned FRONTIER NORTH, INC. - OH 0615 WILMINGTON OH
2005-02-16 937-302-3XXX 3000–3999Assigned FRONTIER NORTH, INC. - OH 0615 WILMINGTON OH
2005-02-16 937-302-4XXX 4000–4999Assigned FRONTIER NORTH, INC. - OH 0615 WILMINGTON OH
2005-02-16 937-302-5XXX 5000–5999Assigned FRONTIER NORTH, INC. - OH 0615 WILMINGTON OH
2005-02-16 937-489-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 SIDNEY OH
2005-02-16 937-660-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2005-02-15 937-209-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 MARYSVILLE OH
2005-02-11 937-437-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 NEW PARIS OH
2005-02-11 937-835-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 LIBERTY OH
2005-02-11 937-882-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 DONNELSVL OH
2005-02-10 937-423-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 GREENVILLE OH
2005-02-10 937-452-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CAMDEN OH
2005-02-10 937-533-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 EATON OH
2005-02-09 937-521-1XXX 1000–1999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B SPRINGFLD OH
2005-02-08 937-582-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DE GRAFF OH
2005-02-08 937-589-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HUNTSVILLE OH
2005-02-08 937-598-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 E LIBERTY OH
2005-02-08 937-601-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WMANSFIELD OH
2005-02-08 937-617-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RIDGEWAY OH
2005-02-08 937-747-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NO LEWISBG OH
2005-01-31 937-533-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 EATON OH
2005-01-31 937-569-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GREENVILLE OH
2005-01-27 937-202-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HOLLANSBG OH
2005-01-24 937-835-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LIBERTY OH
2005-01-20 937-218-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WILMINGTON OH
2005-01-20 937-218-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WILMINGTON OH
2005-01-12 937-529-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TROTWOOD OH
2005-01-05 937-533-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 EATON OH
2005-01-05 937-630-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2005-01-03 937-527-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 WILMINGTON OH
2005-01-03 937-844-7XXX 7000–7999Assigned METROPCS, INC. 5562 BELLEFNTAN OH
2004-12-30 937-876-8XXX 8000–8999Assigned METROPCS, INC. 5562 GREENFIELD OH
2004-12-29 937-514-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 FRANKLIN OH
2004-12-28 937-353-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MSBGWCRLTN OH
2004-12-28 937-412-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FAIRBORN 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.