3.5.128.81
IP Intelligence Briefing: 3.5.128.81/32
Risk Classification: Low Risk
Risk Score: 20
Network Ownership and Role:
The address is registered to Amazon Data Services Northern Virginia (AS16509) within the AMAZON-S3 CIDR block (3.5.0.0/16). Network role identification classified the host as a Web Server associated with Amazon S3 infrastructure. PTR resolution returned s3-r-w.us-east-2.amazonaws.com.
Technical Services:
The host presented open ports on TCP 80, 443, and 8080. TLS validation indicated a certificate issued by CN=Amazon RSA 2048 M01 for *.s3.us-east-2.amazonaws.com. Server banner confirmed "AmazonS3".
Threat Observations:
No active attacker indicators, known campaigns, or blacklist associations were recorded. Abuse confidence scores remained null. Behavioral analysis showed zero honeypot hits, WAF violations, or total incidents. The neighborhood classification was clean with zero threat siblings.
Data Contradictions:
Geo-validation flagged a contradiction between the claimed geolocation (Columbus, US) and RTT physics measurements (6580.9 km distance vs. 35 ms RTT). Route stability was flagged as false.
Recommendation:
Monitor for changes due to signal contradictions present. Current severity is low.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Amazon Data Services Northern Virginia |
| ASN | AS16509 |
| Network Name | AMAZON-S3 |
| CIDR Block | 3.5.0.0/16 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | s3-r-w.us-east-2.amazonaws.com |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | s3-r-w.us-east-2.amazonaws.com |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | 2/2 domains |
| DMARC | 2/2 domains |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 2 domains |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Web Server |
| Network Tier | Hosting — Infrastructure provider without advanced routing |
🔌 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-east-2.amazonaws.coms3.us-east-2.amazonaws.com*.s3.amazonaws.com*.s3-accesspoint.dualstack.us-east-2.amazonaws.com*.s3-control.us-east-2.amazonaws.coms3.dualstack.us-east-2.amazonaws.coms3-control.dualstack.us-east-2.amazonaws.com*.s3-deprecated.us-east-2.amazonaws.com*.s3.dualstack.us-east-2.amazonaws.coms3-control.us-east-2.amazonaws.com |
| Valid From | 2026-07-12T00:00:00+00:00 |
| Valid Until | 2027-01-25T23:59:59+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_128_GCM_SHA256 |
| Signature Algorithm | sha256RSA |
| Validity Period | 197 days |
| Serial Number | 075F79C2B32303609A25DE8583D1F8E2 |
| Thumbprint | 3DBB9A8EA89C1DD8DF473C1CF9666DAEB2C21F70 |
🎯 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 | 25% | 1 | 2 |
| reputation | 0% | 0 | 0 |
| geolocation | 25% | 1 | 1 |
| Overall | 24% | 7 | 8 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-07 05:30:54 UTC |
| Last Seen | 2026-09-21 14:02:52 UTC |
| Profile Built | 2026-09-21 14:11:37 UTC |
| Data Freshness | Live |
| Signal Types | 23 |
| Total Observations | 27 |
Full dossier details are available via our API.