18.239.183.103
Intelligence assessment for 18.239.183.103/32 indicates a Low Risk classification with a risk score of 25. The IP address was registered to Amazon.com, Inc. (AS16509) under the organization AMAZON-CF within the 18.238.0.0/15 CIDR block. Network role analysis confirmed the address served as an Amazon Web Services Web Server, specifically identified via the CloudFront server banner on ports 80 and 443.
Operational data showed the address was listed on one DNS blacklist out of eight total checks. A significant geolocation contradiction was observed where the reported location of Boston, US, contradicted RTT physics measurements, which indicated a 17.0ms round-trip time against a minimum possible latency of 152.5ms for that distance. DNS hygiene was rated Excellent with valid SPF and DMARC records. Behavioral monitoring recorded zero honeypot hits, enumeration strikes, or WAF violations. The surrounding subnet 18.239.183.103/24 was classified as Clean with zero abuse density. Despite the low threat posture, the presence of signal contradictions resulted in a recommendation to Monitor the address.
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 | 18.238.0.0/15 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | server-18-239-183-103.bos50.r.cloudfront.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | server-18-239-183-103.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 | 33% | 2 | 8 |
| routing | 13% | 1 | 1 |
| services | 37% | 2 | 6 |
| ownership | 27% | 2 | 3 |
| reputation | 27% | 1 | 5 |
| geolocation | 33% | 2 | 6 |
| Overall | 28% | 10 | 29 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-08-29 01:43:23 UTC |
| Last Seen | 2026-09-20 09:45:19 UTC |
| Profile Built | 2026-09-22 23:39:18 UTC |
| Data Freshness | Live |
| Signal Types | 25 |
| Total Observations | 44 |
Full dossier details are available via our API.