ArchivedNo longer active, data collection ran March 2024 to September 2026|9,442 records|3,409 source IPs|138 countriesAbout this archive
Shame on you, stupid spammers..Sh4meful  DMARC Spoof Detection
🦋 Bluesky 🐘 Mastodon

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 143 failed authentication events, accounting for 186 messages. Activity spans from March 13, 2024 to June 19, 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 1-50 of 143 failures, affecting 186 messages
Date ▼ Source IP Country Messages
6/19/2026 216.71.143.137 ⚠US1
6/5/2026 139.138.34.173 ⚠US1
4/10/2026 139.138.34.173 ⚠US1
12/19/2025 216.71.143.137 ⚠US1
12/5/2025 216.71.143.137 ⚠US1
11/21/2025 139.138.34.173 ⚠US1
11/14/2025 139.138.34.173 ⚠US1
10/24/2025 216.71.143.137 ⚠US1
10/10/2025 139.138.34.173 ⚠US1
10/3/2025 139.138.34.173 ⚠US1
9/26/2025 216.71.143.137 ⚠US1
9/24/2025 139.138.34.173 ⚠US2
9/12/2025 216.71.143.137 ⚠US1
9/10/2025 139.138.34.173 ⚠US1
9/10/2025 216.71.143.137 ⚠US1
8/22/2025 139.138.34.173 ⚠US1
8/22/2025 216.71.143.137 ⚠US1
8/6/2025 139.138.34.173 ⚠US1
8/6/2025 216.71.143.137 ⚠US1
8/6/2025 216.71.146.53 ⚠US1
8/1/2025 216.71.146.53 ⚠US1
7/23/2025 216.71.146.53 ⚠US1
7/17/2025 216.71.146.53 ⚠US1
7/11/2025 216.71.146.53 ⚠US1
7/2/2025 216.71.143.91 ⚠US1
6/27/2025 139.138.34.153 ⚠US1
6/27/2025 139.138.34.173 ⚠US1
6/27/2025 216.71.143.91 ⚠US3
6/27/2025 23.90.98.32 ⚠US1
6/26/2025 139.138.59.74 ⚠US1
6/25/2025 139.138.34.173 ⚠US1
6/18/2025 216.71.143.91 ⚠US1
6/6/2025 216.71.143.91 ⚠US1
6/4/2025 216.71.143.91 ⚠US4
6/4/2025 23.90.98.32 ⚠US1
5/16/2025 139.138.34.153 ⚠US1
5/15/2025 23.90.98.32 ⚠US1
5/13/2025 216.71.138.142 ⚠US1
5/2/2025 216.71.143.91 ⚠US4
5/2/2025 23.90.98.32 ⚠US1
5/1/2025 207.54.84.22 ⚠US2
4/30/2025 139.138.34.153 ⚠US1
4/18/2025 23.90.98.32 ⚠US1
3/28/2025 139.138.34.153 ⚠US1
3/28/2025 207.54.87.44 ⚠US1
3/28/2025 216.71.146.53 ⚠US1
3/19/2025 216.71.146.53 ⚠US1
3/12/2025 216.71.146.53 ⚠US1
2/28/2025 216.71.146.53 ⚠US1
2/26/2025 139.138.34.153 ⚠US1
2/26/2025 207.54.87.44 ⚠US1
2/26/2025 216.71.146.53 ⚠US1
2/14/2025 207.54.87.44 ⚠US1
2/14/2025 216.71.146.53 ⚠US1
1/17/2025 23.90.98.32 ⚠US1
1/8/2025 23.90.98.32 ⚠US1
12/20/2024 23.90.98.32 ⚠US1
12/19/2024 139.138.34.153 ⚠US3
12/19/2024 216.71.136.90 ⚠US1
12/19/2024 23.90.98.32 ⚠US1
12/18/2024 139.138.34.153 ⚠US2
12/18/2024 139.138.60.237 ⚠US1
12/18/2024 207.54.84.22 ⚠US1
12/18/2024 216.71.138.142 ⚠US1
12/18/2024 216.71.143.91 ⚠US2
12/17/2024 139.138.34.153 ⚠US2
12/17/2024 207.54.84.22 ⚠US2
12/16/2024 139.138.59.74 ⚠US1
12/11/2024 216.71.143.91 ⚠US1
12/11/2024 23.90.98.32 ⚠US1
12/10/2024 216.71.136.89 ⚠US1
12/9/2024 207.54.84.22 ⚠US1
12/5/2024 139.138.34.153 ⚠US1
12/5/2024 216.71.143.91 ⚠US1
12/5/2024 23.90.98.32 ⚠US1
12/4/2024 139.138.34.153 ⚠US2
12/4/2024 207.54.87.44 ⚠US1
12/4/2024 216.71.138.142 ⚠US1
12/4/2024 216.71.143.91 ⚠US1
12/3/2024 139.138.59.74 ⚠US1
11/22/2024 139.138.34.153 ⚠US1
11/21/2024 216.71.143.91 ⚠US1
11/21/2024 23.90.98.32 ⚠US1
11/20/2024 139.138.34.153 ⚠US2
11/20/2024 207.54.87.44 ⚠US1
11/20/2024 216.71.136.90 ⚠US1
11/20/2024 216.71.143.91 ⚠US2
11/19/2024 139.138.59.74 ⚠US1
11/19/2024 207.54.84.22 ⚠US1
11/19/2024 216.71.138.142 ⚠US1
11/13/2024 139.138.34.153 ⚠US1
11/13/2024 207.54.87.44 ⚠US1
11/13/2024 216.71.143.91 ⚠US1
11/13/2024 23.90.98.32 ⚠US1
11/12/2024 139.138.34.153 ⚠US1
11/12/2024 139.138.60.237 ⚠US1
11/12/2024 216.71.143.91 ⚠US1
11/11/2024 207.54.84.22 ⚠US1
11/11/2024 216.71.138.142 ⚠US1
11/8/2024 139.138.34.153 ⚠US2
11/7/2024 139.138.59.74 ⚠US1
11/6/2024 207.54.87.44 ⚠US1
11/6/2024 216.71.143.91 ⚠US1
10/30/2024 139.138.34.101 ⚠US1
10/30/2024 207.54.87.44 ⚠US1
10/23/2024 139.138.60.237 ⚠US1
10/23/2024 207.54.87.44 ⚠US1
10/23/2024 216.71.143.91 ⚠US3
10/22/2024 139.138.59.74 ⚠US1
10/22/2024 207.54.84.22 ⚠US1
10/22/2024 216.71.138.142 ⚠US2
10/16/2024 207.54.87.44 ⚠US1
9/27/2024 139.138.34.153 ⚠US3
9/27/2024 207.54.87.44 ⚠US1
9/27/2024 216.71.136.90 ⚠US1
9/27/2024 216.71.143.91 ⚠US3
9/26/2024 207.54.84.22 ⚠US1
9/26/2024 216.71.138.142 ⚠US2
9/20/2024 216.71.143.91 ⚠US1
9/19/2024 139.138.59.74 ⚠US1
9/19/2024 216.71.138.142 ⚠US1
9/18/2024 139.138.34.153 ⚠US2
9/18/2024 207.54.87.44 ⚠US1
9/18/2024 216.71.136.89 ⚠US1
9/17/2024 139.138.59.74 ⚠US1
9/17/2024 216.71.138.142 ⚠US3
9/13/2024 139.138.34.153 ⚠US3
9/13/2024 216.71.136.89 ⚠US1
9/13/2024 216.71.143.91 ⚠US3
9/12/2024 207.54.84.22 ⚠US1
9/6/2024 216.71.143.91 ⚠US1
8/21/2024 216.71.143.91 ⚠US1
8/7/2024 139.138.34.153 ⚠US2
8/7/2024 216.71.143.91 ⚠US1
6/26/2024 139.138.34.153 ⚠US3
6/12/2024 139.138.34.153 ⚠US1
6/12/2024 216.71.143.91 ⚠US2
5/31/2024 139.138.34.153 ⚠US1
5/31/2024 216.71.143.91 ⚠US2
5/10/2024 139.138.34.153 ⚠US3
4/17/2024 139.138.34.153 ⚠US1
4/17/2024 216.71.143.91 ⚠US2
3/13/2024 216.71.143.91 ⚠US1
Countries