IP Address: 67.231.157.48 ⚠ Network Confounder

⚠ Network Confounder Detected: Proofpoint Email Security
Proofpoint network identifier

This page shows DMARC authentication failure data for this IP address. Learn more about this data.

Geolocation Information

Country:: US United States
Coordinates:: 37.751, -97.822

WHOIS Information

Network Name:: PROOFPOINT-NET-NORTH-AMERICA
CIDR:: 67.231.144.0/20
Owner:: Proofpoint, Inc.
Org ID:: PROOF
Address:: 925 W Maude Ave, Sunnyvale, CA 94085
Reverse DNS:: mx0b-00176a03.pphosted.com
Last updated: 2/5/2026

Analysis

This IP was first observed on September 20, 2024 and most recently on July 9, 2025. It has been associated with 5 failed authentication events affecting 9 messages, representing low but recurring activity. The IP belongs to PROOFPOINT-NET-NORTH-AMERICA (Proofpoint, Inc.), a network with activity associated with United States. 2 other IPs in the same /24 subnet (67.231.157.*) also appear in this dataset.

Network Topology

Failures Detected from this IP

Showing 1-5 of 5 failures, affecting 9 messages

Date ▼	Messages
7/9/2025	2
7/2/2025	2
11/20/2024	3
11/12/2024	1
9/20/2024	1

External Reputation Lookups

Look up this IP in external threat intelligence and reputation databases (opens in new tab):

AbuseIPDB Cisco Talos Project Honey Pot GreyNoise VirusTotal Shodan Censys Spamhaus

Nearby IPs

Other IPs in the 67.231.157.0/24 range observed failing DMARC:

67.231.157.124 (14 failures), 67.231.157.174 (2 failures)