Network: OPTUSCOM-AU

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

Network Information

WHOIS Owner:: Singtel Optus Pty Ltd
Countries:: AU

Unique IPs:: 1

CIDR:: 1.44.0.0/16

Analysis

This network has contributed 1 unique IP address across 2 failed authentication events, accounting for 8 messages. Activity spans from September 18, 2025 to September 19, 2025, with peak volume in September 2025 (2 events). The top countries by failure volume are Australia (100%). The most active source IP from this network includes 1.44.148.158 (2 failures). A single IP dominates activity from OPTUSCOM-AU, suggesting a concentrated or persistent source rather than distributed infrastructure.

Failures Detected from this Network

Showing 1-2 of 2 failures, affecting 8 messages

Show Confoundersⓘ

Date ▲	Source IP	Country	Messages
9/18/2025	1.44.148.158	AU	4
9/19/2025	1.44.148.158	AU	4

Countries

Australia