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)

50,724

IPs (Filtered)

5,208

Networks (Filtered)

200

Messages (Filtered)

85,146

Analysis

United States has contributed 5,208 unique IP addresses across 50,724 failed authentication events, accounting for 85,146 messages across 200 networks. Activity spans from March 5, 2024 to June 24, 2026. The most active networks are AT-88-Z, UK-MICROSOFT-20060601, and MSFT.

Failures

Showing 4,611-4,620 of 50,724 failures, affecting 85,146 messages

Show Confoundersⓘ

Date ▲	Source IP	Country	City	Network	Messages
9/18/2024	40.93.195.102	US United States	San Antonio	MSFT ⓘ	1
9/18/2024	40.107.94.125	US United States		MSFT ⓘ	1
9/18/2024	35.174.145.124 ⚠	US United States	Ashburn	AT-88-Z ⓘ	1
9/18/2024	104.47.51.46	US United States		MSFT ⓘ	1
9/18/2024	104.47.66.43	US United States		MSFT ⓘ	1
9/18/2024	170.10.129.177	US United States		MNA-95 ⚠	1
9/18/2024	104.47.51.42	US United States	Boydton	MSFT ⓘ	1
9/18/2024	104.47.73.174	US United States		MSFT ⓘ	1
9/18/2024	35.174.145.124 ⚠	US United States	Ashburn	AT-88-Z ⓘ	7
9/18/2024	100.24.129.5 ⚠	US United States	Ashburn	AMAZO-4 ⓘ	2

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Geographic Distribution (US)

Color intensity represents message volume

Top Networks in United States

Top Owners in United States