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
2004-09-03 937-840-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 HILLSBORO OH
2004-09-03 937-849-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 MEDWAY OH
2004-09-03 937-964-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 NO HAMPTON OH
2004-08-18 937-381-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PIQUA OH
2004-08-18 937-684-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
2004-08-18 937-688-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SPRINGFLD OH
2004-08-17 937-569-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENVILLE OH
2004-08-16 937-710-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIDNEY OH
2004-07-22 937-401-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 DAYTON OH
2004-07-01 937-779-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WEST UNION OH
2004-06-29 937-506-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TIPP CITY OH
2004-06-29 937-538-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SIDNEY OH
2004-06-29 937-756-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SOUTHSOLON OH
2004-06-29 937-947-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LAURA OH
2004-06-02 937-583-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LEWISBURG OH
2004-05-21 937-844-8XXX 8000–8999Assigned AERIAL COMMUNICATIONS, INC. 6701 BELLEFNTAN OH
2004-05-13 937-247-0XXX 0000–0999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MSBGWCRLTN OH
2004-05-13 937-506-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 TIPP CITY OH
2004-05-13 937-573-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 TROY OH
2004-05-12 937-506-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 TIPP CITY OH
2004-05-12 937-524-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 TROY OH
2004-05-12 937-771-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 ENGLEWOOD OH
2004-04-27 937-303-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARYSVILLE OH
2004-04-27 937-368-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FLTCHELENA OH
2004-04-27 937-675-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 JAMESTOWN OH
2004-04-27 937-771-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 ENGLEWOOD OH
2004-04-21 937-350-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 CENTERVLLE OH
2004-03-18 937-869-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 URBANA OH
2004-03-12 937-340-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ENON OH
2004-03-12 937-405-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWCARLISL OH
2004-03-12 937-462-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SOCHARLETN OH
2004-03-04 937-403-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HILLSBORO OH
2004-03-04 937-403-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HILLSBORO OH
2004-02-06 937-562-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 XENIA OH
2004-01-07 937-522-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DAYTON OH
2004-01-07 937-522-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DAYTON OH
2004-01-07 937-522-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DAYTON OH
2004-01-05 937-405-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWCARLISL OH
2003-12-30 937-543-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NEWCARLISL OH
2003-12-12 937-481-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 WILMINGTON OH
2003-12-12 937-508-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 URBANA OH
2003-11-17 937-280-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 VANDALIA OH
2003-11-17 937-284-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 SPRINGFLD OH
2003-11-17 937-306-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 BEAVERCREK OH
2003-11-17 937-318-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 FAIRBORN OH
2003-11-17 937-347-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 XENIA OH
2003-11-17 937-353-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 MSBGWCRLTN OH
2003-11-17 937-381-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 PIQUA OH
2003-10-30 937-527-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WILMINGTON OH
2003-10-08 937-573-2XXX 2000–2999Assigned CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B TROY 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.