Network: UMBRELLA

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

Network Information

WHOIS Owner:: ORG-AMBR1-RIPE
Countries:: UA

Unique IPs:: 1

CIDR:: 193.33.206.0/23

Analysis

This network has contributed 1 unique IP address across 2 failed authentication events, accounting for 3 messages. Activity spans from April 29, 2026 to May 8, 2026, with peak volume in April 2026 (1 event). The top countries by failure volume are Ukraine (100%). The most active source IP from this network includes 193.33.206.11 (2 failures). A single IP dominates activity from UMBRELLA, suggesting a concentrated or persistent source rather than distributed infrastructure.

Failures Detected from this Network

Showing 1-2 of 2 failures, affecting 3 messages

Show Confoundersⓘ

Date ▼	Source IP	Country	Messages
5/8/2026	193.33.206.11	UA	1
4/29/2026	193.33.206.11	UA	2

Countries

Ukraine