18.161.21.129
Intelligence Briefing: 18.161.21.129/32
Ownership and Network Role
The IP address was identified as part of Amazon.com, Inc. (AS16509) within the 18.160.0.0/15 CIDR block. Infrastructure scans classified the service as a CloudFront web server. DNS resolution confirmed ownership under cloudfront.net with the hostname server-18-161-21-129.bos50.r.cloudfront.net. Open ports detected included TCP/80 and TCP/443.
Threat Profile
Risk assessment categorized the address as Low Risk with a score of 20. No indicators of known attacker activity, spam sources, or blacklist listings were observed. Behavioral analysis recorded zero honeypot hits, enumeration strikes, or WAF violations. The associated subnet 18.161.21.129/24 maintained a mostly_clean classification with an abuse density of 0.1913.
Anomalies and Confidence
Data coherence flagged a contradiction between claimed geolocation (Seattle, Washington) and RTT physics measurements, which indicated a distance of 7883.3 km. This inconsistency resulted in an overall confidence score of 0.35 labeled as Low.
Recommendation
Analysts were advised to Monitor the address due to signal contradictions. No specific firewall rules were generated.
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-18-161-21-129.bos50.r.cloudfront.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | server-18-161-21-129.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 | 27% | 2 | 3 |
| routing | 13% | 1 | 1 |
| services | 27% | 2 | 3 |
| ownership | 27% | 2 | 3 |
| reputation | 13% | 1 | 2 |
| geolocation | 27% | 2 | 3 |
| Overall | 22% | 10 | 15 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-04 05:11:51 UTC |
| Last Seen | 2026-09-24 23:24:31 UTC |
| Profile Built | 2026-09-24 23:36:30 UTC |
| Data Freshness | Live |
| Signal Types | 24 |
| Total Observations | 36 |
Full dossier details are available via our API.