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)

50,269

IPs (Filtered)

5,184

Networks (Filtered)

200

Messages (Filtered)

84,457

Analysis

United States has contributed 5,184 unique IP addresses across 50,269 failed authentication events, accounting for 84,457 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 4,091-4,100 of 50,269 failures, affecting 84,457 messages

Show Confoundersⓘ

Date ▲	Source IP	Country	City	Network	Messages
9/17/2024	2a01:111:f403:2009::723	US United States	Boydton	UK-MICROSOFT-20060601	1
9/17/2024	2a01:111:f403:83b::200	US United States	Boydton	UK-MICROSOFT-20060601	1
9/17/2024	2a01:111:f403:2418::720	US United States	Boydton	N/A	1
9/17/2024	2a01:111:f403:2418::716	US United States	Boydton	UK-MICROSOFT-20060601	1
9/17/2024	2a01:111:f403:2009::604	US United States	Boydton	UK-MICROSOFT-20060601	1
9/17/2024	2a01:111:f403:c112::	US United States	Cheyenne	UK-MICROSOFT-20060601	3
9/17/2024	216.71.138.142	US United States		CISL-7 ⚠	1
9/17/2024	2a01:111:f403:e011::	US United States	Cheyenne	UK-MICROSOFT-20060601	1
9/17/2024	2a01:111:f403:2412::707	US United States		N/A	1
9/17/2024	2a01:111:f403:2416::711	US United States		N/A	1

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Geographic Distribution (US)

Color intensity represents message volume

Top Networks in United States

Top Owners in United States