216.73.217.37
IP Intelligence Briefing: 216.73.217.37
Date: 2026-06-18
1. Profile Summary
- Risk Score: 25 (Low Risk)
- Owner: Anthropic, PBC (ASN 16509)
- Geolocation: Columbus, Ohio, US
- Network Role: Firewalled / No Services (no open ports, no TLS/HTTP services)
- Threat Indicators: None detected (no malware, phishing, or C2 activity).
2. Observation History
- Recent Activity (Last 30 Days):
- 14 total observations; 10% flagged as low risk.
- No spikes in malicious activity.
- Geolocation confirmed as plausible (US, Ohio).
- DNSSEC valid, no DNSBL listings.
3. Network Relationships
- Linked Entities:
- Part of AWS-ANTHROPIC network (likely cloud infrastructure).
- No connections to known malicious organizations, subnets, or domains.
4. Subnet Analysis
- Subnet: 216.73.217.37/24
- Neighbor Risk: 9 IPs in subnet (0 high-risk, 0 medium-risk).
- Abuse Density: 0% (clean subnet).
5. Actionable Insights
- No Immediate Threat: IP is owned by a legitimate entity with no malicious indicators.
- Monitor Subnet: While the subnet is clean, continue monitoring for unexpected changes.
- No Security Actions Required: No firewall rules or mitigations recommended for this IP.
Conclusion:
216.73.217.37 is a low-risk IP associated with Anthropic, PBC. No malicious activity detected. No action required; maintain standard monitoring.
Tools Used:
- `ipdebrief_profile`
- `ipdebrief_history`
- `ipdebrief_relationships`
- `ipdebrief_neighbors`
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Anthropic, PBC |
| ASN | AS16509 |
| Network Name | — |
| CIDR Block | — |
| RIR | ARIN |
| Country | — |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR Record | No PTR |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
🔐 DNS Hygiene
| Hygiene Score | 20% (Poor) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | — |
| 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 | 18% | 2 | 2 |
| routing | 8% | 1 | 1 |
| services | 8% | 1 | 1 |
| ownership | 24% | 2 | 3 |
| reputation | 17% | 1 | 2 |
| geolocation | 21% | 2 | 2 |
| Overall | 16% | 9 | 11 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-07 23:04:11 UTC |
| Last Seen | 2026-06-23 07:39:20 UTC |
| Profile Built | 2026-06-23 07:59:26 UTC |
| Data Freshness | Live |
| Signal Types | 17 |
| Total Observations | 18 |
Full dossier details are available via our API.