187.121.129.138
187.121.129.138 is an IPv4 address operated by SERCOMTEL S/A TELECOMUNICACOES (AS22689), geolocated to Duque de Caxias, Brazil. It belongs to a residential connection. As of November 7, 2026, IPDebrief rates it Low Risk (25/100); no anonymizing service was detected.
The IP address 187.121.129.138 was identified as a low-risk residential endpoint located in Duque de Caxias, Brazil. Ownership records indicated assignment to SERCOMTEL S/A TELECOMUNICACOES (ASN 22689) within the 187.121.128.0/20 block. The address carried a risk score of 25 and was classified as "Low Risk."
Threat analysis showed the IP was not flagged as a known attacker, Tor exit node, or spam source. While the profile was labeled as a "Suspicious Host," no specific indicators were enumerated, and no known campaigns were associated. One DNSBL listing was recorded in control plane data, though the overall threat indicators list remained empty. Neighborhood analysis classified the subnet as clean with zero threat siblings.
Behavioral metrics recorded zero honeypot hits, enumeration strikes, or total incidents. The analysis recommended monitoring the address with low severity due to the clean neighborhood context and lack of active malicious behavior.
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 | 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 | 187.121.129.0/24 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 40% | 2 | 3 |
| routing | 20% | 1 | 1 |
| services | 28% | 2 | 2 |
| ownership | 40% | 2 | 3 |
| reputation | 20% | 1 | 2 |
| geolocation | 28% | 2 | 2 |
| Overall | 29% | 10 | 13 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-11-04 09:48:41 UTC |
| Last Seen | 2026-11-05 20:26:07 UTC |
| Profile Built | 2026-11-07 04:08:20 UTC |
| Data Freshness | Live |
| Signal Types | 18 |
| Total Observations | 20 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 187.121.129.138
Who owns the IP address 187.121.129.138?
187.121.129.138 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 187.121.129.138 located?
Geolocation data places 187.121.129.138 in Duque de Caxias, RJ, Brazil. The local time zone is America/Sao_Paulo. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 187.121.129.138 malicious or safe?
187.121.129.138 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 187.121.129.138 a VPN, proxy, or data center address?
187.121.129.138 is classified as a residential network based on network ownership and behavioural analysis.