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

Network: Claro NXT Telecomunicacoes Ltda

This page shows DMARC authentication failures originating from the Claro NXT Telecomunicacoes Ltda network. Learn more about this data.

Network Information
WHOIS Owner:
Claro NXT Telecomunicacoes Ltda
Countries:
BR
Unique IPs:
17
CIDRs:
177.100.0.0/16, 177.192.0.0/14, (more)

Analysis

This network has contributed 17 unique IP addresses across 17 failed authentication events, accounting for 56 messages. Activity spans from November 16, 2024 to April 7, 2026, with peak volume in June 2025 (4 events). The top countries by failure volume are Brazil (100%). The most active source IPs from this network include 179.157.216.99 (2 failures), 177.194.224.199 (1 failure), 177.192.210.37 (1 failure). Failures from Claro NXT Telecomunicacoes Ltda are concentrated in a single country, which may indicate a targeted campaign or regionally hosted infrastructure.

Failures Detected from this Network
Showing 1-17 of 17 failures, affecting 56 messages
Date โ–ฒ Source IP Country Messages
11/16/2024 179.215.193.32 BR 4
11/22/2024 189.121.203.99 BR 1
2/10/2025 186.220.141.96 BR 3
4/19/2025 186.205.178.46 BR 4
4/19/2025 187.255.97.16 BR 8
5/9/2025 187.36.123.154 BR 4
5/9/2025 191.177.137.18 BR 4
6/16/2025 177.100.125.105 BR 3
6/16/2025 177.194.224.199 BR 4
6/23/2025 189.6.215.199 BR 1
6/28/2025 187.181.140.218 BR 4
7/7/2025 177.192.210.37 BR 1
7/7/2025 189.6.14.200 BR 1
8/27/2025 186.221.66.13 BR 4
2/14/2026 179.157.216.99 BR 2
4/4/2026 177.35.166.105 BR 4
4/7/2026 187.36.163.111 BR 4
Countries