NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

3 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 817
ONVOY, LLC - TX 2
EXIANT COMMUNICATIONS 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
2004-06-15 817-240-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEBURNE TX
2004-06-15 817-240-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEBURNE TX
2004-06-09 817-549-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2004-06-09 817-549-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2004-06-09 817-549-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2004-06-09 817-549-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2004-06-09 817-549-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2004-06-09 817-549-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2004-06-09 817-549-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2004-06-09 817-549-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2004-06-09 817-549-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2004-06-09 817-549-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON TX
2004-06-09 817-582-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATLAS TX
2004-06-09 817-582-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATLAS TX
2004-06-09 817-582-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATLAS TX
2004-06-09 817-582-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATLAS TX
2004-06-09 817-582-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATLAS TX
2004-06-09 817-582-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATLAS TX
2004-06-09 817-582-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATLAS TX
2004-06-09 817-582-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATLAS TX
2004-06-09 817-582-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATLAS TX
2004-06-09 817-582-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATLAS TX
2004-06-03 817-231-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FORT WORTH TX
2004-05-26 817-287-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2004-05-26 817-287-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2004-05-24 817-771-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WEATHERFD TX
2004-04-16 817-422-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2004-04-16 817-559-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANBURY TX
2004-04-13 817-287-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2004-04-13 817-412-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2004-04-08 817-243-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANBURY TX
2004-04-08 817-243-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANBURY TX
2004-04-08 817-776-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANBURY TX
2004-03-09 817-629-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WEATHERFD TX
2004-03-05 817-539-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C MANSFIELD TX
2004-03-05 817-880-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C GLENDALE TX
2004-02-26 817-412-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2004-02-18 817-301-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2004-02-18 817-301-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2004-02-18 817-789-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2004-02-18 817-789-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2004-02-13 817-381-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 RENO TX
2004-02-13 817-382-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SPRINGTOWN TX
2004-01-26 817-301-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2004-01-26 817-778-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 GRAPEVINE TX
2004-01-26 817-778-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 GRAPEVINE TX
2004-01-15 817-449-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2004-01-09 817-412-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2004-01-09 817-412-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2004-01-06 817-357-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 CLEBURNE TX

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.