216.73.217.6
IP Intelligence Briefing: 216.73.217.6
*Last Updated: 2026-06-11*
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**1. Profile Summary**
- Risk Score: 50 (Moderate Risk)
- Ownership:
- ASN: 16509
- Organization: Anthropic, PBC
- Network: AWS-ANTHROPIC
- Region: ARIN (North America)
- Geolocation:
- Country: United States (US)
- City: Columbus, Ohio
- Coordinates: 39.96° N, -83° E
- Threat Indicators:
- No malicious indicators, blacklists, or campaigns detected.
- DNSBL Listings: 2 out of 8 DNSBLs (low severity).
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**2. Network Behavior**
- Network Role:
- Firewalled host with no open services or TLS certificates.
- Likely part of AWS infrastructure (ASN 16509).
- Control Plane:
- BGP Prefix: 216.73.216.0/22
- Route Stability: Unstable (route changes detected in 30 days).
- DNSSEC: Validated.
- Subnet Analysis:
- Subnet: 216.73.217.6/24
- Abuse Density: 0 (clean subnet).
- Neighbor Risk: 7 low-risk IPs, 1 medium-risk IP.
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**3. Temporal Observations**
- Recent Activity (2026-06-11):
- Geolocation: Confirmed in the US (Columbus, OH).
- DNSBL Listings: Listed in 8 DNSBLs (high severity in 1 list).
- Network Stability: Route instability detected.
- No Persistent Threats: No repeated malicious signals.
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**4. Relationships & Neighbors**
- Network Relationships:
- Linked to AWS-ANTHROPIC (same network).
- Neighboring IPs (216.73.217.0/24):
- Low-Risk IPs: 7 IPs (risk scores: 0–25).
- Medium-Risk IP: 1 IP (risk score: 25).
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**5. Threat Context**
- No Active Malicious Activity: No indicators of C2, spam, or exploitation.
- Legitimate Infrastructure: Part of Anthropic’s AWS network.
- Monitor for Changes: Track DNSBL listings and route stability.
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**6. Recommendations**
- No Immediate Action Required: IP is legitimate with no active threats.
- Baseline Monitoring: Continuously monitor for unusual DNS or network behavior.
- Subnet Review: Investigate the medium-risk neighbor (216.73.217.X) for potential lateral movement.
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*Generated by IPDebrief Threat Intelligence Platform*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Anthropic, PBC |
| ASN | AS16509 |
| Network Name | AWS-ANTHROPIC |
| CIDR Block | 216.73.216.0/22 |
| RIR | ARIN |
| Country | United States |
| 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 | 13% | 1 | 1 |
| routing | 13% | 1 | 1 |
| services | 13% | 1 | 1 |
| ownership | 27% | 2 | 3 |
| reputation | 0% | 0 | 0 |
| geolocation | 13% | 1 | 1 |
| Overall | 13% | 6 | 7 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-25 18:47:53 UTC |
| Last Seen | 2026-06-11 00:12:26 UTC |
| Profile Built | 2026-06-11 00:23:16 UTC |
| Data Freshness | Live |
| Signal Types | 16 |
| Total Observations | 16 |
Full dossier details are available via our API.