Shame on you, stupid spammers.. DMARC Spoof Detection
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DMARC Spoof Detection, United States

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This page shows DMARC authentication failures originating from United States. Learn more about this data.

Failures (Filtered)

48,875

IPs (Filtered)

5,116

Networks (Filtered)

196

Messages (Filtered)

82,412

Analysis

United States has contributed 5,116 unique IP addresses across 48,875 failed authentication events, accounting for 82,412 messages across 196 networks. Activity spans from March 5, 2024 to May 5, 2026. The most active networks are AT-88-Z, UK-MICROSOFT-20060601, and MSFT.

Failures

Showing 3,481-3,490 of 48,875 failures, affecting 82,412 messages
Date ▼ Source IP Country City Network Messages
12/18/2025 3.132.222.232 ⚠ US United States Columbus AT-88-Z ⓘ 1
12/18/2025 2a01:111:f403:c107::3 US United States Phoenix UK-MICROSOFT-20060601 1
12/18/2025 2a01:111:f403:c10d::3 ⓘ US United States San Antonio UK-MICROSOFT-20060601 1
12/18/2025 2a01:111:f403:c112::5 US United States Cheyenne UK-MICROSOFT-20060601 1
12/18/2025 140.17.113.224 US United States DNIC-140-017 1
12/18/2025 3.132.108.44 ⚠ US United States Columbus AT-88-Z ⓘ 2
12/18/2025 2a01:111:f403:c112::7 US United States Cheyenne UK-MICROSOFT-20060601 1
12/18/2025 2a01:111:f403:c112::7 US United States Cheyenne UK-MICROSOFT-20060601 1
12/18/2025 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 1
12/18/2025 2a01:111:f403:c001::2 US United States San Jose UK-MICROSOFT-20060601 1

Geographic Distribution (US)

Color intensity represents message volume
Top Networks in United States
Top Owners in United States