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 512
HD CARRIER LLC 2
INTRADO 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
2006-04-11 512-934-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2006-04-11 512-934-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2006-04-10 512-367-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-04-10 512-367-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-04-10 512-367-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-04-10 512-436-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-04-10 512-436-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-04-10 512-436-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-04-10 512-436-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-04-10 512-436-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-28 512-366-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2006-03-28 512-436-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2006-03-28 512-686-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GEORGETOWN TX
2006-03-17 512-483-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2006-03-16 512-365-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TAYLOR TX
2006-03-15 512-788-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-15 512-788-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-15 512-788-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-15 512-788-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-15 512-788-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-15 512-983-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-15 512-983-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-15 512-983-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-15 512-983-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-15 512-983-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2006-03-14 512-237-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SMITHVILLE TX
2006-03-14 512-515-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LIBERTY HL TX
2006-03-14 512-788-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2006-03-14 512-788-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2006-03-14 512-788-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2006-03-13 512-986-5XXX 5000–5999Assigned CSC VOICE, LLC 612K LEANDER TX
2006-03-10 512-369-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2006-03-08 512-674-9XXX 9000–9999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-03-08 512-757-8XXX 8000–8999Assigned GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 SAN MARCOS TX
2006-03-07 512-262-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K KYLE TX
2006-03-07 512-623-8XXX 8000–8999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-02-28 512-487-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2006-02-28 512-494-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2006-02-28 512-494-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2006-02-28 512-494-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2006-02-28 512-514-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2006-02-21 512-673-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2006-02-21 512-673-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2006-02-08 512-486-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2006-02-01 512-618-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAN MARCOS TX
2006-01-27 512-363-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2006-01-24 512-716-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-01-24 512-716-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-01-19 512-492-3XXX 3000–3999Assigned AUSTIN BESTLINE COMPANY 7551 AUSTIN TX
2006-01-18 512-337-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LEANDER 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.