37.66.217.54
IP Intelligence Briefing: 37.66.217.54
*Generated via IPDebrief Analysis*
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**1. Core Profile**
- Risk Score: Low Risk (0/100)
- Ownership:
- ISP: SFR Legal Contact (FR)
- Network: SFR-INFRA (RIPE)
- CIDR: 37.66.216.0/21
- Geolocation:
- Country: United Kingdom (GB)
- City: London
- ISP Jurisdiction: France (FR)
- Network Role: Firewalled infrastructure with no open services or public-facing assets.
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**2. Threat Indicators**
- Malicious Activity: None detected.
- DNS & Certificates:
- No malicious domains or certificates linked.
- DNSSEC validation active (no spoofing risks).
- Network Behavior:
- No signs of botnets, C2 servers, or exploit campaigns.
- No Tor exit nodes or VPN/proxy traffic.
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**3. Observation History (Last 30 Days)**
- Total Signals: 16
- Key Observations:
- Normalized network prefix (37.64.0.0/13) linked to SFR.
- DNS records resolved to `sfr.net` (legitimate).
- No malicious listings or abuse reports.
- Trend: Stable, no escalation in risk metrics.
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**4. Network Relationships**
- Shared Network: SFR-INFRA (same ISP infrastructure).
- Subnet: 37.66.217.54/24 (no neighboring IPs detected).
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**5. Recommendations**
- Monitoring: No immediate action required.
- Defense:
- No firewall rules or WAF policies needed for this IP.
- Continue monitoring for unexpected network changes.
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Conclusion: This IP belongs to a legitimate French ISP (SFR) and shows no signs of malicious activity. No threat mitigation is required at this time.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | SFR Legal Contact |
| ASN | AS15557 |
| Network Name | SFR-INFRA |
| CIDR Block | 37.66.216.0/21 |
| RIR | RIPE |
| Country | FR |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | 54.217.66.37.rev.sfr.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | 54.217.66.37.rev.sfr.net |
🔐 DNS Hygiene
| Hygiene Score | 60% (Good) |
| SPF | Present |
| DMARC | Not configured |
| FCrDNS | Verified |
| DNSSEC | Valid |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Mobile |
| 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 | 0% | 0 | 0 |
| routing | 0% | 0 | 0 |
| services | 0% | 0 | 0 |
| ownership | 27% | 2 | 3 |
| reputation | 0% | 0 | 0 |
| geolocation | 13% | 1 | 1 |
| Overall | 6% | 3 | 4 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-29 12:05:07 UTC |
| Last Seen | 2026-06-11 21:06:37 UTC |
| Profile Built | 2026-06-11 21:10:45 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 22 |
Full dossier details are available via our API.