Shame on you, stupid spammers.. Sh4meful  DMARC Spoof Detection

Network: MSFT

This page shows DMARC authentication failures originating from the MSFT network. Learn more about this data.

Network Information
Owner:
Microsoft
Org ID:
MSFT
Address:
One Microsoft Way, Redmond, WA 98052
Countries:
AU AT CA FR DE HK IN IE JP NO SG KR SE CH NL AE GB US
Unique IPs:
3,324
CIDRs:
104.40.0.0/13, 20.0.0.0/11, (more)

Analysis

This network has contributed 3,324 unique IP addresses across 10,359 failed authentication events, accounting for 13,175 messages. Activity spans from March 12, 2024 to April 10, 2026, with peak volume in September 2024 (1,998 events). The top countries by failure volume are United States (88%), Ireland (3%), The Netherlands (3%). The most active source IPs from this network include 104.47.57.168 (75 failures), 104.47.58.168 (68 failures), 104.47.56.169 (64 failures). Failures from MSFT (Microsoft) span 18 countries with no dominant source, which is consistent with forwarding infrastructure, relay services, or broadly distributed automated activity.

Failures Detected from this Network
Showing 301-350 of 10,359 failures, affecting 13,175 messages
Date โ–ผ Source IP Country Messages
1/7/2026 40.93.20.97 โš  US 1
1/7/2026 40.93.20.98 โš  US 1
1/7/2026 40.93.20.99 โš  US 1
1/7/2026 40.93.23.90 โš  US 1
1/7/2026 40.93.23.93 โš  US 2
1/7/2026 40.93.4.11 โš  US 1
1/7/2026 40.93.6.110 โš  US 1
1/7/2026 40.93.64.14 โš  IE 2
1/7/2026 40.93.64.85 โš  IE 1
1/6/2026 40.107.200.82 โš  US 1
1/6/2026 52.101.53.119 โš  US 1
1/6/2026 52.101.53.83 โš  US 1
12/20/2025 40.93.10.89 โš  US 1
12/20/2025 40.93.13.59 โš  US 1
12/20/2025 40.93.23.92 โš  US 1
12/20/2025 40.93.64.70 โš  IE 1
12/20/2025 40.93.64.81 โš  IE 1
12/19/2025 40.93.10.93 โš  US 1
12/19/2025 40.93.12.16 โš  US 1
12/19/2025 40.93.12.5 โš  US 1
12/19/2025 40.93.13.101 โš  US 2
12/19/2025 40.93.13.49 โš  US 1
12/19/2025 40.93.13.57 โš  US 1
12/19/2025 40.93.14.11 โš  US 1
12/19/2025 40.93.20.96 โš  US 2
12/19/2025 40.93.20.97 โš  US 2
12/19/2025 40.93.214.72 โš  SE 1
12/19/2025 40.93.23.25 โš  US 1
12/19/2025 40.93.23.34 โš  US 1
12/19/2025 40.93.4.4 โš  US 2
12/19/2025 40.93.4.6 โš  US 1
12/19/2025 40.93.64.64 โš  IE 1
12/19/2025 40.93.64.67 โš  IE 1
12/19/2025 40.93.64.85 โš  IE 1
12/19/2025 40.93.65.26 โš  NL 1
12/19/2025 40.93.65.53 โš  NL 1
12/19/2025 40.93.65.64 โš  NL 1
12/19/2025 40.93.8.58 โš  US 1
12/19/2025 40.93.8.61 โš  US 1
12/19/2025 52.103.136.8 โš  US 1
12/19/2025 52.103.137.10 โš  US 1
12/19/2025 52.103.145.18 โš  US 1
12/18/2025 40.93.10.103 โš  US 1
12/18/2025 40.93.10.20 โš  US 1
12/18/2025 40.93.10.74 โš  US 1
12/18/2025 40.93.1.1 โš  US 1
12/18/2025 40.93.12.18 โš  US 1
12/18/2025 40.93.12.2 โš  US 1
12/18/2025 40.93.12.21 โš  US 1
12/18/2025 40.93.12.22 โš  US 1