Shame on you, stupid spammers.. Sh4meful  DMARC Spoof Detection

Network: TELEFÔNICA BRASIL S.A

This page shows DMARC authentication failures originating from the TELEFÔNICA BRASIL S.A network. Learn more about this data.

Network Information
WHOIS Owner:
TELEF?NICA BRASIL S.A
Countries:
BR
Unique IPs:
3
CIDRs:
177.132.0.0/14, 187.88.0.0/14, (more)

Analysis

This network has contributed 3 unique IP addresses across 3 failed authentication events, accounting for 28 messages. Activity spans from April 4, 2024 to January 17, 2026, with peak volume in January 2026 (2 events). The top countries by failure volume are Brazil (100%). The most active source IPs from this network include 177.132.188.44 (1 failure), 187.91.160.26 (1 failure), 189.44.28.119 (1 failure). Failures from TELEFÔNICA BRASIL S.A are concentrated in a single country, which may indicate a targeted campaign or regionally hosted infrastructure.

Failures Detected from this Network
Showing 1-3 of 3 failures, affecting 28 messages
Countries