Sh4mefulIP Address: 3.21.178.168
ℹ️ Network Annotation: Amazon Web Services (AWS)
Last updated: 1/29/2026
This is (part of) the AWS public cloud. Some email protection services run in AWS, but it is also an attack/spam vector.
This page shows DMARC authentication failure data for this IP address. Learn more about this data.
Geolocation Information
- Country:
- US United States
- Region:
- Ohio
- City:
- Columbus
- Coordinates:
- 39.9625, -83.0061
WHOIS Information
- Network Name:
- AT-88-Z
- CIDR:
3.0.0.0/9- Owner:
- Amazon Technologies Inc.
- Org ID:
AT-88-Z- Address:
- 410 Terry Ave N., Seattle, WA 98109
- Reverse DNS:
-
smtp004.production.us-east-2.shield.security
Last updated: 2/5/2026
Analysis
This IP was first observed on June 4, 2025 and most recently on March 12, 2026. It has been associated with 3 failed authentication events affecting 3 messages, representing low but recurring activity. The IP belongs to AT-88-Z (Amazon Technologies Inc.), a network with activity associated with United States.
External Reputation Lookups
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