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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)

48,847

IPs (Filtered)

5,107

Networks (Filtered)

188

Messages (Filtered)

82,380

Analysis

United States has contributed 5,107 unique IP addresses across 48,847 failed authentication events, accounting for 82,380 messages across 188 networks. Activity spans from March 5, 2024 to April 21, 2026. The most active networks are AT-88-Z, UK-MICROSOFT-20060601, and MSFT.

Failures

Showing 331-340 of 48,847 failures, affecting 82,380 messages
Date ▼ Source IP Country City Network Messages
4/8/2026 2a01:111:f403:c112::5 US United States Cheyenne UK-MICROSOFT-20060601 1
4/8/2026 2a01:111:f403:c112::5 US United States Cheyenne UK-MICROSOFT-20060601 1
4/8/2026 2a01:111:f403:c111::5 US United States Des Moines UK-MICROSOFT-20060601 1
4/8/2026 2a01:111:f403:c007::2 ⓘ US United States UK-MICROSOFT-20060601 1
4/8/2026 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 1
4/8/2026 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 1
4/8/2026 2a01:111:f403:c111::9 US United States Des Moines UK-MICROSOFT-20060601 1
4/8/2026 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 2
4/8/2026 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 2
4/8/2026 2a01:111:f403:c107::9 ⓘ US United States Phoenix UK-MICROSOFT-20060601 1

Geographic Distribution (US)

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