18.161.21.5
The IP address 18.161.21.5/32 was associated with Amazon.com, Inc. (AS16509) within the AMAZON-CF network block. Infrastructure analysis identified the host as a Web Server utilizing CloudFront services on ports 80 and 443, resolving to server-18-161-21-5.bos50.r.cloudfront.net. Security assessment classified the address as Low Risk with a score of 25, reporting zero blacklists and no known campaign activity. DNS hygiene was rated excellent with valid SPF, DMARC, and CAA records. However, geolocation data presented a contradiction where the claimed Seattle origin conflicted with RTT physics measurements. Neighborhood analysis classified the subnet as clean but noted two threat siblings within the /24 range. Due to signal contradictions, monitoring was recommended.
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-18-161-21-5.bos50.r.cloudfront.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | server-18-161-21-5.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 | Unknown — Insufficient routing data to classify |
🔌 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 | 40% | 2 | 3 |
| routing | 20% | 1 | 1 |
| services | 40% | 2 | 3 |
| ownership | 40% | 2 | 3 |
| reputation | 20% | 1 | 2 |
| geolocation | 40% | 2 | 3 |
| Overall | 33% | 10 | 15 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-09 07:24:37 UTC |
| Last Seen | 2026-09-12 04:32:30 UTC |
| Profile Built | 2026-09-12 07:31:11 UTC |
| Data Freshness | Live |
| Signal Types | 25 |
| Total Observations | 30 |
Full dossier details are available via our API.