18.161.21.71
IP address 18.161.21.71 belonged to Amazon.com, Inc. (AS16509) within the AMAZON-CF block (18.160.0.0/15). Analysis identified this address as a CloudFront infrastructure component associated with cloudfront.net, operating web server services on ports 80 and 443. The IP carried a Low Risk reputation with a risk score of 20 and maintained zero blacklist associations. Operational analysis indicated minimal threat activity, with no observed campaign correlations or known attacker flags. However, a geolocation validation anomaly existed where claimed Seattle coordinates contradicted RTT physics measurements. The local subnet neighborhood (18.161.21.0/24) was classified as mostly_clean. Due to signal contradictions and low confidence metrics, the operational recommendation was to Monitor the address with low severity, as the data indicated potential classification inconsistencies.
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-18-161-21-71.bos50.r.cloudfront.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | server-18-161-21-71.bos50.r.cloudfront.net |
🔐 DNS Hygiene
| Hygiene Score | 80% (Excellent) |
| SPF | Present |
| DMARC | Present |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Present |
☁️ 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 | 27% | 2 | 3 |
| routing | 13% | 1 | 1 |
| services | 33% | 2 | 4 |
| ownership | 27% | 2 | 3 |
| reputation | 13% | 1 | 2 |
| geolocation | 35% | 2 | 3 |
| Overall | 25% | 10 | 16 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-12 12:47:38 UTC |
| Last Seen | 2026-09-20 07:10:31 UTC |
| Profile Built | 2026-09-23 00:53:15 UTC |
| Data Freshness | Live |
| Signal Types | 23 |
| Total Observations | 31 |
Full dossier details are available via our API.