18.239.166.42
Intelligence analysis classified IP 18.239.166.42 as a Low Risk asset (Score: 25) operated by Amazon.com, Inc. (ASN 16509). The address functioned as an Amazon CloudFront node, resolving to server-18-239-166-42.bos50.r.cloudfront.net within the 18.239.160.0/21 block. Observations confirmed standard web services (HTTP/HTTPS) on ports 80 and 443. The endpoint presented a valid Amazon TLS certificate for the domain cloudfront.net. Threat indicators yielded no matches against known campaigns or attacker databases. A single DNSBL listing was recorded against eight total lists. Geolocation data flagged a contradiction where claimed Boston, US coordinates conflicted with RTT physics measurements indicating a 7625.7km distance from the probe origin. Behavioral monitoring showed zero WAF violations and
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-18-239-166-42.bos50.r.cloudfront.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | server-18-239-166-42.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 | Web server detected |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | *.cloudfront.netcloudfront.net |
| Valid From | 2026-08-25T00:00:00+00:00 |
| Valid Until | 2027-03-10T23:59:59+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_128_GCM_SHA256 |
| Signature Algorithm | sha256RSA |
| Validity Period | 197 days |
🛡️ Public Network Snapshot
| Origin ASN | AS16509 |
| Network Prefix | 18.239.160.0/21 |
| Route mapping | Found |
| Certificates in transparency logs | 0 certificates |
| HSTS | Not detected |
| CSP | Not detected |
| HTTP/2 | Not detected |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 13% | 1 | 1 |
| routing | 13% | 1 | 1 |
| services | 42% | 2 | 3 |
| ownership | 27% | 2 | 3 |
| reputation | 13% | 1 | 1 |
| geolocation | 13% | 1 | 1 |
| Overall | 20% | 8 | 10 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-30 03:45:36 UTC |
| Last Seen | 2026-10-12 05:44:51 UTC |
| Profile Built | 2026-10-12 05:58:13 UTC |
| Data Freshness | Live |
| Signal Types | 25 |
| Total Observations | 29 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 18.239.166.42
Who owns the IP address 18.239.166.42?
18.239.166.42 is registered to Amazon.com, Inc.. The address falls within the 18.238.0.0/15 network block. Registration is held at ARIN.
Where is 18.239.166.42 located?
Geolocation data places 18.239.166.42 in Boston, US-MA, United States. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 18.239.166.42 malicious or safe?
18.239.166.42 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 18.239.166.42?
The reverse DNS (PTR) record for 18.239.166.42 is server-18-239-166-42.bos50.r.cloudfront.net. This hostname is forward-confirmed, meaning it resolves back to the same address.
What ports are open on 18.239.166.42?
Responsive ports observed on 18.239.166.42 include 80, 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.