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)

50,735

IPs (Filtered)

5,214

Networks (Filtered)

201

Messages (Filtered)

85,158

Analysis

United States has contributed 5,214 unique IP addresses across 50,735 failed authentication events, accounting for 85,158 messages across 201 networks. Activity spans from March 5, 2024 to July 3, 2026. The most active networks are AT-88-Z, UK-MICROSOFT-20060601, and MSFT.

Failures

Showing 8,401-8,410 of 50,735 failures, affecting 85,158 messages
Date ▼ Source IP Country City Network Messages
11/12/2025 2a01:111:f403:c000::c US United States San Jose UK-MICROSOFT-20060601 1
11/12/2025 2a01:111:f403:c101::7 US United States Washington UK-MICROSOFT-20060601 1
11/12/2025 2a01:111:f403:c112::5 US United States Cheyenne UK-MICROSOFT-20060601 1
11/12/2025 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 2
11/12/2025 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 2
11/12/2025 2a01:111:f403:c10d::1 US United States San Antonio UK-MICROSOFT-20060601 1
11/12/2025 2a01:111:f403:c10d::3 ⓘ US United States San Antonio UK-MICROSOFT-20060601 1
11/12/2025 2a01:111:f403:c111::5 US United States Des Moines UK-MICROSOFT-20060601 1
11/12/2025 2a01:111:f403:c000::1 US United States San Jose UK-MICROSOFT-20060601 1
11/12/2025 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 3

Geographic Distribution (US)

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