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
2004-01-06 817-357-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 CLEBURNE TX
2003-12-19 817-380-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KELLER TX
2003-12-19 817-779-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MANSFIELD TX
2003-12-03 817-591-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C ATLAS TX
2003-11-17 817-727-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2003-11-17 817-727-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2003-11-17 817-727-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2003-11-17 817-727-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2003-11-17 817-727-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2003-11-17 817-727-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2003-11-17 817-727-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2003-11-13 817-404-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2003-11-05 817-482-2XXX 2000–2999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 KELLER TX
2003-11-03 817-778-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 GRAPEVINE TX
2003-11-03 817-778-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 GRAPEVINE TX
2003-11-03 817-778-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 GRAPEVINE TX
2003-10-16 817-629-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WEATHERFD TX
2003-10-07 817-506-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CLEBURNE TX
2003-10-06 817-305-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 GRAPEVINE TX
2003-10-06 817-516-4XXX 4000–4999Assigned ONVOY, LLC - TX 903C KENNEDALE TX
2003-10-06 817-567-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C ROANOKE TX
2003-10-06 817-772-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C ATLAS TX
2003-09-30 817-539-4XXX 4000–4999Assigned AT&T - LOCAL 7421 MANSFIELD TX
2003-09-26 817-676-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2003-09-26 817-676-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2003-09-26 817-676-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2003-09-26 817-676-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2003-09-22 817-753-6XXX 6000–6999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 KELLER TX
2003-09-22 817-753-7XXX 7000–7999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 KELLER TX
2003-09-10 817-404-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2003-09-10 817-532-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 EULESS TX
2003-09-10 817-532-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EULESS TX
2003-09-10 817-532-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EULESS TX
2003-08-28 817-422-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2003-08-28 817-422-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2003-08-28 817-676-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2003-08-11 817-395-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2003-08-11 817-395-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2003-08-11 817-992-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2003-08-08 817-205-5XXX 5000–5999Assigned METROPCS, INC. 5562 FORT WORTH TX
2003-08-08 817-205-6XXX 6000–6999Assigned METROPCS, INC. 5562 FORT WORTH TX
2003-08-08 817-205-7XXX 7000–7999Assigned METROPCS, INC. 5562 FORT WORTH TX
2003-08-08 817-205-8XXX 8000–8999Assigned METROPCS, INC. 5562 FORT WORTH TX
2003-08-08 817-205-9XXX 9000–9999Assigned METROPCS, INC. 5562 FORT WORTH TX
2003-07-22 817-240-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEBURNE TX
2003-07-22 817-240-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEBURNE TX
2003-07-22 817-648-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEBURNE TX
2003-07-22 817-648-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEBURNE TX
2003-07-17 817-243-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANBURY TX
2003-07-17 817-243-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANBURY 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.