3.171.38.108
Intelligence Briefing: 3.171.38.108/32
Overview
IP 3.171.38.108/32 registered a reputation score of 20, classified as Low Risk. Ownership records attribute the address to Amazon.com, Inc. (ASN 16509) under organization AMAZON-CF.
Infrastructure
The address resolves to the domain cloudfront.net via forward DNS confirmation. PTR records identified the host as server-3-171-38-108.iad61.r.cloudfront.net. Network services included TCP 80 and TCP 443, with a server banner returning "CloudFront". DNS hygiene scored 80, labeled as Excellent, with SPF and DMARC records present.
Threat Assessment
No threat indicators, known campaigns, or blacklist entries were associated with the IP. Abuse confidence scores were null, and no incidents were recorded. The neighborhood classification was mostly_clean with an abuse density of 0.2.
Anomalies
A contradiction existed between claimed geolocation and RTT physics measurements. Geolocation data indicated 7625.7km distance from Washington D.C., US, while observed RTT was 23.0ms against a minimum possible RTT of 152.5ms.
Recommendation
The recommended action is Monitor with Low severity due to signal contradictions. No firewall rules were required.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Amazon.com, Inc. |
| ASN | AS16509 |
| Network Name | AMAZON-CF |
| CIDR Block | 3.168.0.0/14 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | server-3-171-38-108.iad61.r.cloudfront.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | server-3-171-38-108.iad61.r.cloudfront.net |
🔐 DNS Hygiene
| Hygiene Score | 80% (Excellent) |
| SPF | Present |
| DMARC | Present |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Present |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Web Server |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 80 | http | tcp | — |
| 443 | https | tcp | — |
| Closed Ports | 22, 25, 3389, 8080, 8443 (2 open / 7 scanned) | ||
| Server | CloudFront |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 25% | 1 | 1 |
| routing | 25% | 1 | 1 |
| services | 50% | 2 | 3 |
| ownership | 0% | 0 | 0 |
| reputation | 0% | 0 | 0 |
| geolocation | 50% | 2 | 3 |
| Overall | 25% | 6 | 8 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-25 01:55:27 UTC |
| Last Seen | 2026-09-25 01:55:27 UTC |
| Profile Built | 2026-09-25 02:09:48 UTC |
| Data Freshness | Live |
| Signal Types | 25 |
| Total Observations | 25 |
Full dossier details are available via our API.