Sh4mefulIP Address: 52.212.19.177 ⚠ IP Confounder
Dormant. IP address 52.212.19.177 is registered to Amazon Technologies Inc and geolocates to Dublin, Ireland. It first appeared in sh4meful's dataset on March 13, 2024 and was most recently observed on June 24, 2026. Over the observation window, it has failed DMARC alignment 166 times across 8 distinct sender domains. Its reverse DNS resolves to eu.cloud-sec-av.com. Network context: this address sits within AT-88-Z (Amazon Technologies Inc), a network sh4meful has observed producing 185 failures across 33 distinct IPs during the same window. This volume is elevated relative to most IPs observed in sh4meful's dataset and warrants closer scrutiny.
Failure Activity Over Time
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:
- AT-88-Z
- CIDR:
52.216.0.0/14, 52.220.0.0/15, 52.192.0.0/12, 52.223.128.0/18, 52.223.0.0/17, 52.208.0.0/13, 52.222.0.0/16- Owner:
- Amazon Technologies Inc.
- Org ID:
AT-88-Z- Address:
- 410 Terry Ave N., Seattle, WA 98109
- Reverse DNS:
-
eu.cloud-sec-av.com
Last updated: 2/5/2026
Analysis
This IP is classified as a confounder: Avanan/Check Point Email Security. Failures observed from this source are expected artifacts of legitimate mail-handling behavior, typically email forwarding or mailing-list processing, and do not indicate spoofing attempts.
The host is operated by Amazon Technologies Inc and geolocates to Dublin, Ireland. Its presence in DMARC aggregate reports is an artifact of how forwarded mail interacts with SPF and DKIM authentication, not a sign of abuse originating from this address.
Administrators observing this IP in their DMARC aggregate reports should not block or treat it as hostile. Avanan and Check Point are cloud-based email security gateways. Their regional relay IPs appear in DMARC reports when they inspect and re-deliver inbound mail. Adding their ranges to your SPF record or flagging them in your DMARC reporting tool will suppress these entries.
Amazon Web Services (AWS)
This is (part of) the AWS public cloud. Some email protection services run in AWS, but it is also an attack/spam vector.
IP Confounder: Avanan/Check Point Email Security
Breaks DKIM signatures during email processing
Failures Detected from this IP
Showing 1-50 of 166 failures, affecting 2,273 messages| Date ▼ | Messages |
|---|---|
| 6/24/2026 | 7 |
| 6/20/2026 | 1 |
| 6/19/2026 | 3 |
| 6/17/2026 | 4 |
| 6/6/2026 | 1 |
| 6/5/2026 | 3 |
| 6/3/2026 | 4 |
| 5/16/2026 | 1 |
| 5/15/2026 | 4 |
| 5/13/2026 | 4 |
| 4/10/2026 | 3 |
| 4/8/2026 | 4 |
| 3/27/2026 | 4 |
| 3/25/2026 | 4 |
| 3/14/2026 | 1 |
| 3/13/2026 | 4 |
| 3/11/2026 | 5 |
| 2/28/2026 | 1 |
| 2/27/2026 | 6 |
| 2/25/2026 | 4 |
| 1/31/2026 | 3 |
| 1/30/2026 | 6 |
| 1/28/2026 | 1 |
| 1/27/2026 | 1 |
| 1/17/2026 | 3 |
| 1/16/2026 | 6 |
| 1/14/2026 | 1 |
| 1/13/2026 | 1 |
| 1/10/2026 | 3 |
| 1/9/2026 | 7 |
| 1/7/2026 | 1 |
| 1/6/2026 | 1 |
| 12/20/2025 | 6 |
| 12/19/2025 | 4 |
| 12/18/2025 | 1 |
| 12/17/2025 | 3 |
| 12/13/2025 | 3 |
| 12/12/2025 | 6 |
| 12/10/2025 | 1 |
| 12/9/2025 | 1 |
| 12/6/2025 | 6 |
| 12/5/2025 | 8 |
| 12/4/2025 | 1 |
| 12/3/2025 | 3 |
| 12/2/2025 | 1 |
| 11/22/2025 | 9 |
| 11/21/2025 | 7 |
| 11/20/2025 | 1 |
| 11/19/2025 | 5 |
| 11/18/2025 | 1 |
External Reputation Lookups
Look up this IP in external threat intelligence and reputation databases (opens in new tab):
Recommended Action
If this IP appears in your own DMARC reports, treat it as an unauthorized sender unless you have specifically verified it as a legitimate service you use. Ensure your DMARC policy is at p=quarantine or p=reject to prevent delivery of messages this IP claims to send from your domain. If you're new to DMARC, our complete guide walks through the mechanics.