3.5.81.35
Intelligence Briefing: IP 3.5.81.35/32
Overview
The IP address was classified as Low Risk with a risk score of 25. The profile indicated live signal freshness as of 2026-09-25.
Ownership and Infrastructure
Ownership was attributed to Amazon Data Services Northern Virginia (ASN 16509) under the CIDR block 3.5.0.0/16. The network role was identified as a Web Server associated with Amazon Web Services.
Network Behavior
DNS reverse resolution returned the hostname s3-fips-r-w.us-west-2.amazonaws.com. Open ports included TCP 80, 443, and 8080. TLS certificates confirmed the domain scope for s3-us-west-2.amazonaws.com. Server banners identified the service as AmazonS3.
Threat Assessment
No known attacker, spam source, or Tor exit node indicators were associated with the address. The blacklist count was zero, and no active campaigns were correlated. The IP was not flagged as a known attacker or persistent malicious host.
Anomalies and Recommendations
A geolocation contradiction was recorded, where the claimed Portland, OR location contradicted RTT physics measurements (7950.7 km distance vs 84 ms RTT). Due to signal contradictions present in the control plane data, the recommendation was to Monitor the address at low severity. No firewall rules were generated.
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-fips-r-w.us-west-2.amazonaws.com |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | s3-fips-r-w.us-west-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-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 | 3 |
| routing | 19% | 1 | 2 |
| services | 33% | 2 | 4 |
| ownership | 27% | 2 | 3 |
| reputation | 13% | 1 | 1 |
| geolocation | 33% | 2 | 4 |
| Overall | 26% | 10 | 17 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-05 06:42:30 UTC |
| Last Seen | 2026-09-25 17:19:36 UTC |
| Profile Built | 2026-09-25 17:34:45 UTC |
| Data Freshness | Live |
| Signal Types | 23 |
| Total Observations | 34 |
Full dossier details are available via our API.