16.15.39.163
Subject: IP Intelligence Briefing - 16.15.39.163
Target Overview:
The IP address 16.15.39.163 was identified as a Low Risk asset with a risk score of 25. Ownership records attributed the address to Amazon.com, Inc. (AS16509), specifically within the AMAZO-4 block in Portland, OR, US.
Network Role and Services:
Analysis revealed the host functioned as an Amazon S3 Web Server. Open ports included 80 (HTTP), 443 (HTTPS), and 8080 (HTTP-alt). TLS certificates were issued by Amazon RSA 2048 M04 for the domain *.s3-us-west-2.amazonaws.com. Server banners returned "AmazonS3" with an HTTP version of 1.1 and a 307 status code.
Threat and Behavioral Context:
No active threat indicators, blacklist entries, or known campaign associations were recorded. The behavioral profile showed zero incidents, honeypot hits, or enumeration strikes. However, the asset was classified as a Suspicious Host due to signal contradictions.
Technical Discrepancies:
A contradiction was flagged between claimed geolocation (7,951km distance) and observed RTT physics (84ms minimum possible RTT for that distance). Additionally, DNS hygiene scores were rated "None" with no SPF, DMARC, or DNSSEC validation present.
Recommendation:
Operational guidance suggested monitoring the address for changes rather than immediate blocking, maintaining a low severity posture.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Amazon.com, Inc. |
| ASN | AS16509 |
| Network Name | AMAZO-4 |
| CIDR Block | 16.15.0.0/16 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR Record | No PTR |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
🔐 DNS Hygiene
| Hygiene Score | 0% (None) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
☁️ 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 | — |
| 8080 | http-alt | tcp | — |
| Closed Ports | 22, 25, 3389, 8443 (3 open / 7 scanned) | ||
| Server | AmazonS3 |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | *.s3-us-west-2.amazonaws.com*.s3.amazonaws.coms3-control.us-west-2.amazonaws.com*.s3.dualstack.us-west-2.amazonaws.coms3-deprecated.us-west-2.amazonaws.coms3-control.dualstack.us-west-2.amazonaws.com*.s3-deprecated.us-west-2.amazonaws.coms3.amazonaws.coms3.dualstack.us-west-2.amazonaws.com*.s3-control.dualstack.us-west-2.amazonaws.com |
| Valid From | 2025-11-18T00:00:00+00:00 |
| Valid Until | 2026-10-30T23:59:59+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_128_GCM_SHA256 |
| Signature Algorithm | sha256RSA |
| Validity Period | 346 days |
| Serial Number | 0F061457518182D12E2A6E2A1F0B6A58 |
| Thumbprint | F8A8052C6A4D1B65BBE8A25159D059B84184CB1E |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 35% | 2 | 2 |
| routing | 25% | 1 | 1 |
| services | 35% | 2 | 2 |
| ownership | 50% | 2 | 3 |
| reputation | 0% | 0 | 0 |
| geolocation | 25% | 1 | 1 |
| Overall | 28% | 8 | 9 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-16 21:54:25 UTC |
| Last Seen | 2026-09-16 21:54:25 UTC |
| Profile Built | 2026-09-16 22:05:18 UTC |
| Data Freshness | Live |
| Signal Types | 18 |
| Total Observations | 18 |
Full dossier details are available via our API.