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
2005-01-03 817-771-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WEATHERFD TX
2004-12-29 817-591-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ATLAS TX
2004-12-29 817-778-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GRAPEVINE TX
2004-12-29 817-803-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EULESS TX
2004-12-28 817-240-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEBURNE TX
2004-12-28 817-240-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEBURNE TX
2004-12-28 817-240-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEBURNE TX
2004-12-27 817-385-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARLINGTON TX
2004-12-27 817-385-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARLINGTON TX
2004-12-27 817-385-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARLINGTON TX
2004-12-27 817-385-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARLINGTON TX
2004-12-27 817-422-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARLINGTON TX
2004-12-27 817-522-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARLINGTON TX
2004-12-16 817-603-0XXX 0000–0999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 FORT WORTH TX
2004-12-16 817-603-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 FORT WORTH TX
2004-12-16 817-603-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 FORT WORTH TX
2004-12-16 817-603-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 FORT WORTH TX
2004-12-16 817-603-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 FORT WORTH TX
2004-12-16 817-603-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 FORT WORTH TX
2004-12-16 817-603-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 FORT WORTH TX
2004-12-16 817-603-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 FORT WORTH TX
2004-12-16 817-603-8XXX 8000–8999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 FORT WORTH TX
2004-12-16 817-603-9XXX 9000–9999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 FORT WORTH TX
2004-12-16 817-830-0XXX 0000–0999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 NRICHLDHLS TX
2004-12-16 817-830-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 NRICHLDHLS TX
2004-12-16 817-830-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 NRICHLDHLS TX
2004-12-16 817-830-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 NRICHLDHLS TX
2004-12-16 817-830-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 NRICHLDHLS TX
2004-12-16 817-830-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 NRICHLDHLS TX
2004-12-16 817-830-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 NRICHLDHLS TX
2004-12-16 817-830-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 NRICHLDHLS TX
2004-12-16 817-830-8XXX 8000–8999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 NRICHLDHLS TX
2004-12-16 817-830-9XXX 9000–9999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 NRICHLDHLS TX
2004-12-16 817-977-0XXX 0000–0999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 ARLINGTON TX
2004-12-16 817-977-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 ARLINGTON TX
2004-12-16 817-977-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 ARLINGTON TX
2004-12-16 817-977-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 ARLINGTON TX
2004-12-16 817-977-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 ARLINGTON TX
2004-12-16 817-977-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 ARLINGTON TX
2004-12-16 817-977-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 ARLINGTON TX
2004-12-16 817-977-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 ARLINGTON TX
2004-12-16 817-977-8XXX 8000–8999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 ARLINGTON TX
2004-12-16 817-977-9XXX 9000–9999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 ARLINGTON TX
2004-12-10 817-210-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FORT WORTH TX
2004-12-07 817-385-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C ARLINGTON TX
2004-12-02 817-205-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT WORTH TX
2004-12-02 817-205-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT WORTH TX
2004-12-02 817-205-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT WORTH TX
2004-11-17 817-952-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J EULESS TX
2004-11-15 817-789-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON 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.