Sh4mefulNetwork: MICROSOFT-IPV6-BLK
This page shows DMARC authentication failures originating from the MICROSOFT-IPV6-BLK network. Learn more about this data.
Analysis
This network has contributed 53 unique IP addresses across 73 failed authentication events, accounting for 74 messages. Activity spans from September 12, 2024 to April 10, 2026, with peak volume in June 2025 (11 events). The top countries by failure volume are United States (100%). The most active source IPs from this network include 2001:489a:2202:c::612 (3 failures), 2001:489a:2202:d::61c (3 failures), 2001:489a:2202:d::61f (3 failures). Failures from MICROSOFT-IPV6-BLK (Microsoft) are concentrated in a single country, which may indicate a targeted campaign or regionally hosted infrastructure.
Failures Detected from this Network
Showing 51-73 of 73 failures, affecting 74 messages| Date ▼ | Source IP | Country | Messages |
|---|---|---|---|
| 6/18/2025 | US | 1 | |
| 6/4/2025 | US | 1 | |
| 6/4/2025 | US | 1 | |
| 5/16/2025 | US | 1 | |
| 5/13/2025 | US | 1 | |
| 5/2/2025 | US | 1 | |
| 5/2/2025 | US | 1 | |
| 5/1/2025 | US | 1 | |
| 2/26/2025 | US | 1 | |
| 2/26/2025 | US | 1 | |
| 2/14/2025 | US | 1 | |
| 2/14/2025 | US | 1 | |
| 12/19/2024 | US | 1 | |
| 12/19/2024 | US | 1 | |
| 12/18/2024 | US | 1 | |
| 12/18/2024 | US | 1 | |
| 12/17/2024 | US | 1 | |
| 12/4/2024 | US | 1 | |
| 11/19/2024 | US | 1 | |
| 11/11/2024 | US | 1 | |
| 10/22/2024 | US | 1 | |
| 9/26/2024 | US | 1 | |
| 9/12/2024 | US | 1 |