Shame on you, stupid spammers.. Sh4meful  DMARC Spoof Detection
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Network: PROOFPOINT-NET-NORTH-AMERICA ⚠ Confounder

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:
81
CIDRs:
148.163.128.0/19, 208.84.64.0/22, (more)

Analysis

This network has contributed 81 unique IP addresses across 293 failed authentication events, accounting for 495 messages. Activity spans from March 12, 2024 to April 7, 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 251-293 of 293 failures, affecting 495 messages
Date ▼ Source IP Country Messages
9/27/2024 148.163.148.242 ⚠ US 1
9/27/2024 148.163.157.157 ⚠ US 2
9/27/2024 148.163.158.33 ⚠ US 2
9/27/2024 67.231.147.141 ⚠ US 5
9/27/2024 67.231.149.128 ⚠ US 12
9/27/2024 67.231.149.52 ⚠ US 1
9/27/2024 67.231.155.141 ⚠ US 3
9/27/2024 67.231.157.124 ⚠ US 6
9/20/2024 148.163.134.61 ⚠ US 1
9/20/2024 148.163.138.61 ⚠ US 1
9/20/2024 148.163.143.251 ⚠ US 2
9/20/2024 148.163.148.242 ⚠ US 1
9/20/2024 148.163.150.39 ⚠ US 1
9/20/2024 148.163.158.42 ⚠ US 2
9/20/2024 67.231.147.141 ⚠ US 2
9/20/2024 67.231.153.164 ⚠ US 1
9/20/2024 67.231.155.141 ⚠ US 4
9/20/2024 67.231.157.124 ⚠ US 5
9/20/2024 67.231.157.48 ⚠ US 1
9/18/2024 148.163.143.251 ⚠ US 1
9/18/2024 148.163.152.242 ⚠ US 1
9/18/2024 148.163.158.42 ⚠ US 2
9/18/2024 67.231.145.199 ⚠ US 1
9/18/2024 67.231.149.128 ⚠ US 6
9/18/2024 67.231.157.124 ⚠ US 12
9/13/2024 148.163.134.61 ⚠ US 2
9/13/2024 148.163.138.61 ⚠ US 1
9/13/2024 148.163.144.161 ⚠ US 2
9/13/2024 148.163.149.120 ⚠ US 1
9/13/2024 148.163.152.242 ⚠ US 1
9/13/2024 148.163.153.119 ⚠ US 1
9/13/2024 148.163.156.45 ⚠ US 1
9/13/2024 148.163.157.157 ⚠ US 2
9/13/2024 148.163.158.42 ⚠ US 1
9/13/2024 67.231.149.128 ⚠ US 2
9/13/2024 67.231.157.124 ⚠ US 11
5/31/2024 67.231.158.203 ⚠ US 2
5/30/2024 67.231.149.179 ⚠ US 1
5/30/2024 67.231.157.174 ⚠ US 2
5/10/2024 67.231.151.74 ⚠ US 1
5/10/2024 67.231.158.203 ⚠ US 1
3/13/2024 148.163.152.242 ⚠ US 1
3/12/2024 67.231.157.174 ⚠ US 2
Countries