Shame on you, stupid spammers.. Sh4meful  DMARC Spoof Detection
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Network: CISL-7 ⚠ Confounder

This page shows DMARC authentication failures originating from the CISL-7 network. Learn more about this data.

Network Information
Owner:
Cisco
Org ID:
CISL-7
Address:
170 West Tasman Drive, San Jose, CA 95134
Countries:
US
Unique IPs:
14
CIDRs:
139.138.24.0/21, 139.138.32.0/20, 139.138.32.0/20, 139.138.24.0/21, (more)

Analysis

This network has contributed 14 unique IP addresses across 141 failed authentication events, accounting for 184 messages. Activity spans from March 13, 2024 to April 10, 2026, with peak volume in December 2024 (26 events). The top countries by failure volume are United States (100%). The most active source IPs from this network include 139.138.34.153 (27 failures), 216.71.143.91 (26 failures), 23.90.98.32 (13 failures). Failures from CISL-7 (Cisco) are concentrated in a single country, which may indicate a targeted campaign or regionally hosted infrastructure.

Failures Detected from this Network
Showing 51-100 of 141 failures, affecting 184 messages
Date ▼ Source IP Country Messages
2/14/2025 207.54.87.44 ⚠ US 1
2/14/2025 216.71.146.53 ⚠ US 1
1/17/2025 23.90.98.32 ⚠ US 1
1/8/2025 23.90.98.32 ⚠ US 1
12/20/2024 23.90.98.32 ⚠ US 1
12/19/2024 139.138.34.153 ⚠ US 3
12/19/2024 216.71.136.90 ⚠ US 1
12/19/2024 23.90.98.32 ⚠ US 1
12/18/2024 139.138.34.153 ⚠ US 2
12/18/2024 139.138.60.237 ⚠ US 1
12/18/2024 207.54.84.22 ⚠ US 1
12/18/2024 216.71.138.142 ⚠ US 1
12/18/2024 216.71.143.91 ⚠ US 2
12/17/2024 139.138.34.153 ⚠ US 2
12/17/2024 207.54.84.22 ⚠ US 2
12/16/2024 139.138.59.74 ⚠ US 1
12/11/2024 216.71.143.91 ⚠ US 1
12/11/2024 23.90.98.32 ⚠ US 1
12/10/2024 216.71.136.89 ⚠ US 1
12/9/2024 207.54.84.22 ⚠ US 1
12/5/2024 139.138.34.153 ⚠ US 1
12/5/2024 216.71.143.91 ⚠ US 1
12/5/2024 23.90.98.32 ⚠ US 1
12/4/2024 139.138.34.153 ⚠ US 2
12/4/2024 207.54.87.44 ⚠ US 1
12/4/2024 216.71.138.142 ⚠ US 1
12/4/2024 216.71.143.91 ⚠ US 1
12/3/2024 139.138.59.74 ⚠ US 1
11/22/2024 139.138.34.153 ⚠ US 1
11/21/2024 216.71.143.91 ⚠ US 1
11/21/2024 23.90.98.32 ⚠ US 1
11/20/2024 139.138.34.153 ⚠ US 2
11/20/2024 207.54.87.44 ⚠ US 1
11/20/2024 216.71.136.90 ⚠ US 1
11/20/2024 216.71.143.91 ⚠ US 2
11/19/2024 139.138.59.74 ⚠ US 1
11/19/2024 207.54.84.22 ⚠ US 1
11/19/2024 216.71.138.142 ⚠ US 1
11/13/2024 139.138.34.153 ⚠ US 1
11/13/2024 207.54.87.44 ⚠ US 1
11/13/2024 216.71.143.91 ⚠ US 1
11/13/2024 23.90.98.32 ⚠ US 1
11/12/2024 139.138.34.153 ⚠ US 1
11/12/2024 139.138.60.237 ⚠ US 1
11/12/2024 216.71.143.91 ⚠ US 1
11/11/2024 207.54.84.22 ⚠ US 1
11/11/2024 216.71.138.142 ⚠ US 1
11/8/2024 139.138.34.153 ⚠ US 2
11/7/2024 139.138.59.74 ⚠ US 1
11/6/2024 207.54.87.44 ⚠ US 1
Countries