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)

50,268

IPs (Filtered)

5,183

Networks (Filtered)

200

Messages (Filtered)

84,456

Analysis

United States has contributed 5,183 unique IP addresses across 50,268 failed authentication events, accounting for 84,456 messages across 200 networks. Activity spans from March 5, 2024 to June 20, 2026. The most active networks are AT-88-Z, UK-MICROSOFT-20060601, and MSFT.

Failures

Showing 6,111-6,120 of 50,268 failures, affecting 84,456 messages
Date ▼ Source IP Country City Network Messages
12/4/2025 100.24.129.5 ⚠ US United States Ashburn AMAZO-4 ⓘ 1
12/4/2025 2a01:111:f403:c000::1 US United States San Jose UK-MICROSOFT-20060601 1
12/4/2025 2a01:111:f403:c007::2 ⓘ US United States UK-MICROSOFT-20060601 1
12/4/2025 2a01:111:f403:c112::5 US United States Cheyenne UK-MICROSOFT-20060601 1
12/4/2025 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 3
12/4/2025 2a01:111:f403:c105::5 US United States Chicago UK-MICROSOFT-20060601 1
12/4/2025 2a01:111:f403:c107::9 ⓘ US United States Phoenix UK-MICROSOFT-20060601 1
12/4/2025 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 8
12/4/2025 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 1
12/4/2025 35.174.145.124 ⚠ US United States Ashburn AT-88-Z ⓘ 8

Geographic Distribution (US)

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