Network: GRAPESC

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

Network Information

WHOIS Owner:: ORG-GS394-RIPE
Countries:: CZ

Unique IPs:: 1

CIDR:: 91.192.33.0/24

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 August 2, 2026. The top countries by failure volume are Czechia (100%). The most active source IP from this network includes 91.192.33.52 (1 failure). A single IP dominates activity from GRAPESC, 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
8/2/2026	91.192.33.52	CZ	4

Countries

Czechia