187.107.88.97
IP Intelligence Briefing: 187.107.88.97
*Generated via IPDebrief Analysis*
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**1. Core Profile**
- Risk Score: Moderate (65/100)
- Ownership:
- ASN: AS28573
- Organization: Claro NXT Telecomunicacoes Ltda (Brazilian ISP)
- Geolocation: São Bernardo do Campo, São Paulo, Brazil (SP)
- Network Role: Residential endpoint (mobile carrier: Claro, LTE/5G)
- Threat Indicators:
- Listed in 3/8 DNSBLs (moderate risk)
- No direct malicious activity (no malware, phishing, or exploit indicators)
- No known attacker campaigns or spam sources
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**2. Observation History**
- Latest Activity:
- 2026-06-09: Detected in 3 DNSBLs (high-severity listings)
- 2026-06-02: Geolocation inferred (confidence 52%) with coordinates (-23.695, -46.5616)
- Operator Score: Minimal risk (0.13)
- Trend: No persistent malicious behavior; risk score stable.
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**3. Relationships**
- Network: Part of subnet 137244 (AS28573)
- DNS Associations:
- PTR hostname: `bb6b5861.virtua.com.br`
- No email authentication (SPF/DKIM/DMArC)
- No Certificates/TLS Services: No SSL/TLS certificates or web server banners detected.
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**4. Neighborhood Analysis**
- Subnet: 187.107.88.97/24
- Abuse Density: 0% (clean subnet)
- Neighbors: No active or malicious sibling IPs found.
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**5. Recommendations**
- Monitor:
- Track DNSBL listings and geolocation consistency.
- Check for unexpected traffic patterns or port activity.
- Mitigation:
- Consider blocking DNSBL-listed IPs in firewall rules.
- Validate geolocation data for potential spoofing risks.
Conclusion: This residential IP from a Brazilian ISP shows moderate risk due to DNSBL listings but no direct malicious indicators. SOC teams should monitor for behavioral changes or network anomalies.
*Generated by IPDebrief – Cybersecurity Threat Intelligence Platform*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Claro NXT Telecomunicacoes Ltda |
| ASN | AS28573 |
| Network Name | 137244 |
| CIDR Block | 187.104.0.0/14 |
| RIR | LACNIC |
| Country | BR |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | bb6b5861.virtua.com.br |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | bb6b5861.virtua.com.br |
🔐 DNS Hygiene
| Hygiene Score | 20% (Poor) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Residential |
| Service Purpose | Residential Endpoint |
| Network Tier | End-User — Residential ISP endpoint |
🔌 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 | 21% | 2 | 2 |
| routing | 13% | 1 | 1 |
| services | 8% | 1 | 1 |
| ownership | 15% | 2 | 2 |
| reputation | 15% | 1 | 2 |
| geolocation | 19% | 2 | 2 |
| Overall | 15% | 9 | 10 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-07 23:04:02 UTC |
| Last Seen | 2026-06-23 01:36:26 UTC |
| Profile Built | 2026-06-23 01:39:48 UTC |
| Data Freshness | Live |
| Signal Types | 18 |
| Total Observations | 21 |
Full dossier details are available via our API.