Sh4mefulIP Address: 63.34.218.101 ⚠ IP Confounder
This service provides anti-malware and anti-spam (AV/AS) scanning via Exchange Online Protection (EOP) and hosted email via Exchange Online. It does sometimes break DKIM and DMARC authentication, though this can be a misconfiguration on the part of administrators.
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:
- IE Ireland
- Region:
- Leinster
- City:
- Dublin
- Coordinates:
- 53.3382, -6.2591
WHOIS Information
- Network Name:
- AMAZO-4
- CIDR:
63.32.0.0/14- Owner:
- Amazon.com, Inc.
- Org ID:
AMAZO-4- Address:
- Amazon Web Services, Inc. P.O. Box 81226, Seattle, WA 98108-1226
- Reverse DNS:
-
mta-efe5f1.eu.email.fireeyecloud.com
Last updated: 2/5/2026
Analysis
This IP was first observed on September 13, 2024 and most recently on October 10, 2025. It has been associated with 16 failed authentication events affecting 25 messages, representing moderate activity. The IP belongs to AMAZO-4 (Amazon.com, Inc.), a network with activity associated with Ireland. 2 other IPs in the same /24 subnet (63.34.218.*) also appear in this dataset.
Network Topology
External Reputation Lookups
Look up this IP in external threat intelligence and reputation databases (opens in new tab):
Nearby IPs
Other IPs in the 63.34.218.0/24 range observed failing DMARC:
63.34.218.102 (22 failures), 63.34.218.100 (20 failures)