187.121.128.166
🏢 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 | — |
🌐 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 | 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 | — |
🛡️ Public Network Snapshot
| Origin ASN | AS22689 |
| Network Prefix | 187.121.128.0/24 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 35% | 2 | 2 |
| routing | 25% | 1 | 1 |
| services | 25% | 1 | 1 |
| ownership | 0% | 0 | 0 |
| reputation | 25% | 1 | 1 |
| geolocation | 25% | 1 | 1 |
| Overall | 22% | 6 | 6 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-07 06:27:28 UTC |
| Last Seen | 2026-09-01 11:27:49 UTC |
| Profile Built | 2026-08-30 15:24:49 UTC |
| Data Freshness | Live |
| Signal Types | 15 |
| Total Observations | 16 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 187.121.128.166
Who owns the IP address 187.121.128.166?
187.121.128.166 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 187.121.128.166 located?
Geolocation data places 187.121.128.166 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 187.121.128.166 malicious or safe?
187.121.128.166 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.
Is 187.121.128.166 a VPN, proxy, or data center address?
187.121.128.166 is classified as a residential network based on network ownership and behavioural analysis.