Sh4mefulIP Address: 34.223.36.100 ⚠ 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:
- US United States
- Region:
- Oregon
- City:
- Boardman
- Coordinates:
- 45.8401, -119.705
WHOIS Information
- Network Name:
- AT-88-Z
- CIDR:
34.192.0.0/10- Owner:
- Amazon Technologies Inc.
- Org ID:
AT-88-Z- Address:
- 410 Terry Ave N., Seattle, WA 98109
- Reverse DNS:
-
mta-231cee.us.email.fireeyecloud.com
Last updated: 2/5/2026
Analysis
This IP was first observed on March 13, 2024 and most recently on March 13, 2026. It has been associated with 36 failed authentication events affecting 71 messages, representing significant volume. The IP belongs to AT-88-Z (Amazon Technologies Inc.), a network with activity associated with United States. 2 other IPs in the same /24 subnet (34.223.36.*) also appear in this dataset.
Network Topology
Failures Detected from this IP
Showing 1-36 of 36 failures, affecting 71 messages| Date ▼ | Messages |
|---|---|
| 3/13/2026 | 1 |
| 3/10/2026 | 1 |
| 1/28/2026 | 1 |
| 12/19/2025 | 1 |
| 12/3/2025 | 1 |
| 10/1/2025 | 1 |
| 9/25/2025 | 2 |
| 9/17/2025 | 1 |
| 7/31/2025 | 2 |
| 7/10/2025 | 1 |
| 7/1/2025 | 1 |
| 6/27/2025 | 7 |
| 6/25/2025 | 1 |
| 6/13/2025 | 1 |
| 6/4/2025 | 1 |
| 4/30/2025 | 1 |
| 3/12/2025 | 1 |
| 2/26/2025 | 1 |
| 2/14/2025 | 1 |
| 12/11/2024 | 1 |
| 12/5/2024 | 3 |
| 12/4/2024 | 2 |
| 11/22/2024 | 1 |
| 11/20/2024 | 1 |
| 11/13/2024 | 2 |
| 11/12/2024 | 7 |
| 10/23/2024 | 3 |
| 9/27/2024 | 6 |
| 9/25/2024 | 3 |
| 9/20/2024 | 1 |
| 9/18/2024 | 1 |
| 9/13/2024 | 9 |
| 9/6/2024 | 1 |
| 6/26/2024 | 1 |
| 5/31/2024 | 1 |
| 3/13/2024 | 1 |
External Reputation Lookups
Look up this IP in external threat intelligence and reputation databases (opens in new tab):
Nearby IPs
Other IPs in the 34.223.36.0/24 range observed failing DMARC:
34.223.36.10 (45 failures), 34.223.36.101 (39 failures)