# 3.15.117.81 — IP Intelligence Summary

3.15.117.81 is an IPv4 address operated by Amazon Technologies Inc. (AS16509), geolocated to Columbus, United States. It belongs to datacenter or hosting infrastructure with reverse DNS name ec2-3-15-117-81.us-east-2.compute.amazonaws.com. As of October 29, 2026, IPDebrief rates it High Risk (70/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/3.15.117.81
- Last updated: 2026-10-29

## Ownership

- Organization: Amazon Technologies Inc.
- Network name: AT-88-Z
- Allocated block: 3.0.0.0/9
- ASN: AS16509 (https://ipdebrief.com/asn/16509)
- Regional registry: ARIN
- Cloud / hosting provider: Amazon Web Services

## Location

- City: Columbus
- Region: OH
- Country: United States
- Time zone: America/New_York

## Network classification

- Infrastructure type: CloudCompute
- Datacenter / hosting: yes
- Residential: no
- Mobile: no
- Anycast: no
- Tor exit node: no
- VPN: no
- Proxy: no

## Risk assessment

- Assessment: High Risk (70/100)
- Blocklist listings: 0
- Suspicious activity indicators: no
- Spam source: no

## Reverse DNS

- ec2-3-15-117-81.us-east-2.compute.amazonaws.com
- Forward-confirmed: yes

## Exposed services

- 80/tcp — http
- 443/tcp — https

## Analyst narrative

**Intelligence Briefing: IP Address 3.15.117.81**

**Risk Assessment:** High Risk

**Risk Score:** 70

**Recommended Action:** Block (Critical Severity)

**Ownership and Infrastructure:**

The IP address 3.15.117.81 belongs to Amazon Technologies Inc. (ASN 16509) within the Amazon Web Services (AWS) CloudCompute environment. The infrastructure is identified as an EC2 instance located in Columbus, Ohio, United States (us-east-2).

**Technical Profile:**

Network scans identified the address serving HTTP (TCP 80) and HTTPS (TCP 443) traffic. The server banner reported \`awselb/2.0\`, indicating an AWS Elastic Load Balancer. The TLS certificate was issued by Amazon RSA 2048 M04 for the subject \`CN=*.eufy.com\`. DNS records confirmed reverse and forward resolution to \`ec2-3-15-117-81.us-east-2.compute.amazonaws.com\`.

**Threat Indicators:**

While the address is hosted on a cloud provider, the profile indicates a critical risk posture. Correlation data identified 14 correlated IPs and 14 certificate matches. The campaign likelihood was classified as "high" based on these correlations. Despite the address being registered to a legitimate cloud provider, the high risk score and associated campaign data warrant defensive measures.

**Recommendation:**

The profile recommends blocking this address at the perimeter to mitigate potential threat exposure.

**Firewall Rule Examples:**

*   **iptables:** \`iptables -A INPUT -s 3.15.117.81 -j DROP\`

*   **nginx:** \`deny 3.15.117.81;\`

*   **pf:** \`block in quick on egress from 3.15.117.81\`

**Data Freshness:**

Observations recorded as of October 29, 2026.

## Addresses sharing infrastructure

- 3.19.19.87 — Same TLS certificate (https://ipdebrief.com/3.19.19.87)
- 3.22.87.167 — Same TLS certificate (https://ipdebrief.com/3.22.87.167)
- 3.129.199.188 — Same TLS certificate (https://ipdebrief.com/3.129.199.188)
- 3.133.19.107 — Same TLS certificate (https://ipdebrief.com/3.133.19.107)
- 3.136.193.197 — Same TLS certificate (https://ipdebrief.com/3.136.193.197)
- 3.139.10.103 — Same TLS certificate (https://ipdebrief.com/3.139.10.103)
- 3.142.190.204 — Same TLS certificate (https://ipdebrief.com/3.142.190.204)
- 3.149.15.104 — Same TLS certificate (https://ipdebrief.com/3.149.15.104)
- 3.151.157.200 — Same TLS certificate (https://ipdebrief.com/3.151.157.200)
- 16.58.21.135 — Same TLS certificate (https://ipdebrief.com/16.58.21.135)
- 16.58.45.99 — Same TLS certificate (https://ipdebrief.com/16.58.45.99)
- 18.190.87.212 — Same TLS certificate (https://ipdebrief.com/18.190.87.212)

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Source: IPDebrief, "3.15.117.81 IP intelligence", https://ipdebrief.com/3.15.117.81, updated 2026-10-29. Assessments are probabilistic.