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)

8,627

IPs (Filtered)

3,059

Networks (Filtered)

176

Messages (Filtered)

12,201

Analysis

United States has contributed 3,059 unique IP addresses across 8,627 failed authentication events, accounting for 12,201 messages across 176 networks. Activity spans from March 5, 2024 to March 26, 2026. The most active networks are MSFT, GOOGLE, and TWILI-11.

Failures

Showing 291-300 of 8,627 (failures, affecting 12,201 messages)

Show Confoundersⓘ

Date ▼	Source IP	Country	City	Network	Messages
11/20/2025	2607:f8b0:4864:20::f45	US United States		GOOGLE-IPV6	1
11/20/2025	2607:f8b0:4864:20::f47	US United States		GOOGLE-IPV6	1
11/20/2025	2607:f8b0:4864:20::746	US United States		GOOGLE-IPV6	1
11/20/2025	52.101.52.34	US United States	Washington	MSFT ⓘ	1
11/20/2025	15.204.205.244	US United States	Reston	OUL-16	1
11/20/2025	140.17.137.235	US United States		DNIC-140-017	1
11/20/2025	40.107.201.18	US United States	Chicago	MSFT ⓘ	1
11/20/2025	140.17.137.229	US United States		DNIC-140-017	1
11/19/2025	2a0d:6c2:6:4c8::	US United States	Fremont	Huize-Holdings	1
11/19/2025	165.212.64.25	US United States	Danbury	SILVERSKY-INC-USANET	2

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Geographic Distribution (US)

Color intensity represents message volume

Top Networks in United States

Top Owners in United States