3.5.81.227
The IP address 3.5.81.227/32 was identified as a host within the AMAZON-S3 network (ASN 16509), owned by Amazon Data Services Northern Virginia. The infrastructure operated primarily as a Web Server with active services on ports 80, 443, and 8080. TLS analysis confirmed the endpoint served *.s3-us-west-2.amazonaws.com within the us-west-2 region.
Overall reputation scoring classified the asset as Low Risk with a score of 25. However, threat classification flagged the host as a Suspicious Host due to signal contradictions, specifically a discrepancy between claimed geolocation in Portland, OR, and RTT physics measurements indicating a distance of 7950.7km. Control plane data indicated the IP was listed on one of eight DNS blacklists.
Neighborhood analysis of the /24 subnet revealed an abuse density of 0.1333 with two active threat siblings. The asset was observed between August 30 and September 21, 2026. Due to conflicting signals regarding geolocation and RTT stability, the recommended action was to monitor the asset for changes while maintaining low severity alerting.
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 Record | No PTR |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
🔐 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-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 | 44% | 2 | 7 |
| routing | 13% | 1 | 1 |
| services | 38% | 2 | 5 |
| ownership | 27% | 2 | 3 |
| reputation | 26% | 1 | 4 |
| geolocation | 33% | 2 | 4 |
| Overall | 30% | 10 | 24 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-08-30 01:59:18 UTC |
| Last Seen | 2026-09-21 12:43:43 UTC |
| Profile Built | 2026-09-21 12:58:31 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 36 |
Full dossier details are available via our API.