187.121.129.128
Intelligence Briefing: 187.121.129.128/32
Risk Assessment: Low Risk (Score: 25)
Ownership: SERCOMTEL S/A TELECOMUNICACOES (ASN 22689), Brazil (Duque de Caxias, RJ)
The IP address 187.121.129.128/32 was assessed as Low Risk with a risk score of 25. Ownership records linked the address to SERCOMTEL S/A TELECOMUNICACOES (ASN 22689) within the LACNIC region. Network scans indicated no open services, classifying the endpoint as Firewalled.
Threat analysis returned no known campaigns, spam sources, or Tor exit node activity. Behavioral indicators showed no honeypot hits or enumeration strikes. Neighborhood data classified the subnet as clean with zero threat siblings. A single DNSBL listing was detected during control plane analysis.
The recommended action was Monitor with low severity, attributed to the clean neighborhood classification. Confidence levels remained Very Low due to limited data sufficiency.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | SERCOMTEL S/A TELECOMUNICACOES |
| ASN | AS22689 |
| Network Name | 244971 |
| CIDR Block | 187.121.128.0/20 |
| RIR | LACNIC |
| Country | BR |
| 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 | 0% (None) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Residential |
| Service Purpose | Single-Service Host |
| Network Tier | End-User — Residential ISP endpoint |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 80 | http | tcp | — |
| Closed Ports | 22, 25, 443, 3389, 8080, 8443 (1 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS22689 |
| Network Prefix | 187.121.129.0/24 |
| Route mapping | Found |
| HSTS | Not detected |
| CSP | Not detected |
| HTTP/2 | Not detected |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 25% | 1 | 1 |
| routing | 25% | 1 | 1 |
| services | 25% | 1 | 1 |
| ownership | 0% | 0 | 0 |
| reputation | 0% | 0 | 0 |
| geolocation | 25% | 1 | 1 |
| Overall | 16% | 4 | 4 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-11-02 17:50:03 UTC |
| Last Seen | 2026-11-02 17:50:03 UTC |
| Profile Built | 2026-11-02 17:57:32 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 20 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 187.121.129.128
Who owns the IP address 187.121.129.128?
187.121.129.128 is registered to SERCOMTEL S/A TELECOMUNICACOES. The address falls within the 187.121.128.0/20 network block. Registration is held at LACNIC.
Where is 187.121.129.128 located?
Geolocation data places 187.121.129.128 in Duque de Caxias, Rio de Janeiro, Brazil. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 187.121.129.128 malicious or safe?
187.121.129.128 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.
What ports are open on 187.121.129.128?
Responsive ports observed on 187.121.129.128 include 80. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.
Is 187.121.129.128 a VPN, proxy, or data center address?
187.121.129.128 is classified as a residential network based on network ownership and behavioural analysis.