Network: A4 TELECOM SERVICOS DE TELECOMUNICACAO LTDA

This network has contributed 2 unique IP addresses across 2 failed authentication events, accounting for 4 messages. Activity spans from July 27, 2026 to August 6, 2026, with peak volume in July 2026 (1 event). The top countries by failure volume are Brazil (100%). The most active source IPs from this network include 138.97.78.46 (1 failure), 138.97.78.54 (1 failure). Failures from A4 TELECOM SERVICOS DE TELECOMUNICACAO LTDA are concentrated in a single country, which may indicate a targeted campaign or regionally hosted infrastructure.