Sh4mefulNetwork: PROOFPOINT-NET-NORTH-AMERICA ⚠ Confounder
Proofpoint network identifier
This page shows DMARC authentication failures originating from the PROOFPOINT-NET-NORTH-AMERICA network. Learn more about this data.
Network Information
- Owner:
- Proofpoint
- Org ID:
PROOF- Address:
- 925 W Maude Ave, Sunnyvale, CA 94085
- Countries:
- US
- Unique IPs:
- 82
- CIDRs:
-
148.163.128.0/19,208.84.64.0/22, (more)
Analysis
This network has contributed 82 unique IP addresses across 294 failed authentication events, accounting for 496 messages. Activity spans from March 12, 2024 to May 21, 2026, with peak volume in July 2025 (67 events). The top countries by failure volume are United States (100%). The most active source IPs from this network include 148.163.133.153 (18 failures), 148.163.137.153 (17 failures), 67.231.149.128 (15 failures). Failures from PROOFPOINT-NET-NORTH-AMERICA (Proofpoint) 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 294 failures, affecting 496 messages| Date ▼ | Source IP | Country | Messages |
|---|---|---|---|
| 5/21/2026 | US | 1 | |
| 4/7/2026 | US | 1 | |
| 3/24/2026 | US | 1 | |
| 3/10/2026 | US | 1 | |
| 2/24/2026 | US | 1 | |
| 1/30/2026 | US | 1 | |
| 1/28/2026 | US | 1 | |
| 1/14/2026 | US | 1 | |
| 1/14/2026 | US | 1 | |
| 1/8/2026 | US | 1 | |
| 1/7/2026 | US | 1 | |
| 12/16/2025 | US | 1 | |
| 12/10/2025 | US | 1 | |
| 12/3/2025 | US | 1 | |
| 12/2/2025 | US | 1 | |
| 11/20/2025 | US | 1 | |
| 11/19/2025 | US | 1 | |
| 11/11/2025 | US | 1 | |
| 10/21/2025 | US | 1 | |
| 10/10/2025 | US | 1 | |
| 10/8/2025 | US | 1 | |
| 10/7/2025 | US | 1 | |
| 10/3/2025 | US | 1 | |
| 10/2/2025 | US | 1 | |
| 10/1/2025 | US | 1 | |
| 10/1/2025 | US | 1 | |
| 9/30/2025 | US | 1 | |
| 9/26/2025 | US | 1 | |
| 9/26/2025 | US | 2 | |
| 9/26/2025 | US | 2 | |
| 9/24/2025 | US | 1 | |
| 9/24/2025 | US | 1 | |
| 9/24/2025 | US | 1 | |
| 9/24/2025 | US | 1 | |
| 9/23/2025 | US | 1 | |
| 9/19/2025 | US | 1 | |
| 9/19/2025 | US | 1 | |
| 9/18/2025 | US | 1 | |
| 9/17/2025 | US | 1 | |
| 9/17/2025 | US | 1 | |
| 9/12/2025 | US | 1 | |
| 9/12/2025 | US | 2 | |
| 9/12/2025 | US | 2 | |
| 9/11/2025 | US | 1 | |
| 9/11/2025 | US | 1 | |
| 9/11/2025 | US | 1 | |
| 9/10/2025 | US | 1 | |
| 9/10/2025 | US | 1 | |
| 9/10/2025 | US | 1 | |
| 9/9/2025 | US | 1 |