Network: NOS

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

Network Information

WHOIS Owner:: NOS COMUNICACOES S.A.
Countries:: PT

Unique IPs:: 1

CIDR:: 85.138.192.0/18

Analysis

This network has contributed 1 unique IP address across 1 failed authentication event, accounting for 4 messages. Activity from this network was observed on April 21, 2025. The top countries by failure volume are Portugal (100%). The most active source IP from this network includes 85.138.254.183 (1 failure). A single IP dominates activity from NOS, suggesting a concentrated or persistent source rather than distributed infrastructure.

Failures Detected from this Network

Showing 1-1 of 1 failures, affecting 4 messages

Show Confoundersⓘ

Date ▲	Source IP	Country	Messages
4/21/2025	85.138.254.183	PT	4

Countries

Portugal