18.161.21.83
Intelligence analysis on 18.161.21.83/32 identified the address as an Amazon Web Services infrastructure endpoint belonging to AMAZON-CF (ASN 16509). Forward DNS resolution confirmed the hostname server-18-161-21-83.bos50.r.cloudfront.net. Active services included HTTP on port 80 and HTTPS on port 443, with a CloudFront server banner observed.
The asset maintained a risk score of 25 (Low Risk) and was not listed on any blacklists. Threat indicators were absent, and zero incidents were recorded within the behavioral profile. DNS hygiene remained excellent with valid SPF and DMARC authentication. The /24 subnet neighborhood showed a mostly clean classification with an abuse density of 0.1188.
Discrepancies existed between claimed geolocation (Washington, US) and physical RTT measurements. Operational monitoring indicated activity between September 1 and September 26, 2026. Recommendation: Monitor for signal changes due to geolocation inconsistencies, though severity remains low.
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 | 18.160.0.0/15 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | server-18-161-21-83.bos50.r.cloudfront.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | server-18-161-21-83.bos50.r.cloudfront.net |
🔐 DNS Hygiene
| Hygiene Score | 80% (Excellent) |
| SPF | 2/2 domains |
| DMARC | 2/2 domains |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Present |
| 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 | — |
| 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 | 33% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 33% | 2 | 4 |
| ownership | 27% | 2 | 3 |
| reputation | 13% | 1 | 2 |
| geolocation | 33% | 2 | 5 |
| Overall | 25% | 10 | 19 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-01 02:16:30 UTC |
| Last Seen | 2026-09-26 00:45:29 UTC |
| Profile Built | 2026-09-26 00:56:31 UTC |
| Data Freshness | Live |
| Signal Types | 24 |
| Total Observations | 41 |
Full dossier details are available via our API.