Network: TELSTRA-AU

This page shows DMARC authentication failures originating from the TELSTRA-AU network. Learn more about this data.

Network Information

WHOIS Owner:: ORG-TC6-AP
Countries:: AU

Unique IPs:: 2

CIDRs:: 144.130.0.0/17, 144.136.0.0/15

Analysis

This network has contributed 2 unique IP addresses across 4 failed authentication events, accounting for 5 messages. Activity spans from March 24, 2025 to September 21, 2025, with peak volume in September 2025 (3 events). The top countries by failure volume are Australia (100%). The most active source IPs from this network include 144.137.220.230 (3 failures), 144.130.109.188 (1 failure). Failures from TELSTRA-AU, a commercial ISP, are concentrated in a single country, which may indicate a targeted campaign or regionally hosted infrastructure.

Failures Detected from this Network

Showing 1-4 of 4 failures, affecting 5 messages

Show Confoundersⓘ

Date ▼	Source IP	Country	Messages
9/21/2025	144.137.220.230	AU	1
9/20/2025	144.137.220.230	AU	1
9/19/2025	144.137.220.230	AU	1
3/24/2025	144.130.109.188	AU	2

Countries

Australia