Network: OPTUSINTERNET-AU

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

Network Information

WHOIS Owner:: ORG-OIPL5-AP
Countries:: AU

Unique IPs:: 1

CIDR:: 58.105.176.0/20

Analysis

This network has contributed 1 unique IP address across 4 failed authentication events, accounting for 6 messages. Activity spans from December 31, 2025 to January 13, 2026, with peak volume in January 2026 (4 events). The top countries by failure volume are Australia (100%). The most active source IP from this network includes 58.105.183.243 (5 failures). A single IP dominates activity from OPTUSINTERNET-AU, suggesting a concentrated or persistent source rather than distributed infrastructure.

Failures Detected from this Network

Showing 1-4 of 4 failures, affecting 6 messages

Show Confoundersⓘ

Date ▲	Source IP	Country	Messages
12/31/2025	58.105.183.243	AU	2
1/8/2026	58.105.183.243	AU	1
1/12/2026	58.105.183.243	AU	2
1/13/2026	58.105.183.243	AU	1

Countries

Australia