186.205.21.143
Intelligence assessment for 186.205.21.143 classified the address as a low-risk residential endpoint associated with Claro NXT Telecomunicacoes Ltda (ASN 28573). Geolocation data indicated Rio de Janeiro, Brazil, with network traffic originating from the Claro mobile carrier via LTE/5G technology. Threat intelligence profiles indicated a risk score of 0, with zero blacklist entries and no associations with known attacker campaigns or spam sources. Behavioral analysis confirmed the address as a residential mobile device rather than an infrastructure proxy or hosting service. DNS records resolved to bacd158f.virtua.com.br, but email authentication was not configured. Observations spanning from 2026-07-03 to 2026-09-10 recorded no malicious activity or honeypot strikes. The neighborhood analysis classified the subnet as clean with no threat siblings. Security teams were advised to allow traffic at the firewall level due to the absence of significant risk indicators.
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 | 143202 |
| CIDR Block | 186.204.0.0/14 |
| RIR | LACNIC |
| Country | BR |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | bacd158f.virtua.com.br |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | bacd158f.virtua.com.br |
🔐 DNS Hygiene
| Hygiene Score | 0% (None) |
| SPF | 0/2 domains |
| DMARC | 0/2 domains |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 2 domains |
☁️ 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 | AS28573 |
| Network Prefix | 186.205.0.0/16 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 12% | 2 | 2 |
| routing | 8% | 1 | 1 |
| services | 8% | 1 | 1 |
| ownership | 12% | 2 | 2 |
| reputation | 8% | 1 | 2 |
| geolocation | 17% | 2 | 3 |
| Overall | 11% | 9 | 11 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-03 04:40:26 UTC |
| Last Seen | 2026-10-05 06:09:58 UTC |
| Profile Built | 2026-10-05 06:10:10 UTC |
| Data Freshness | Live |
| Signal Types | 23 |
| Total Observations | 28 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 186.205.21.143
Who owns the IP address 186.205.21.143?
186.205.21.143 is registered to Claro NXT Telecomunicacoes Ltda. The address falls within the 186.204.0.0/14 network block. Registration is held at LACNIC.
Where is 186.205.21.143 located?
Geolocation data places 186.205.21.143 in Rio de Janeiro, 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 186.205.21.143 malicious or safe?
186.205.21.143 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 is the hostname for 186.205.21.143?
The reverse DNS (PTR) record for 186.205.21.143 is bacd158f.virtua.com.br. This hostname is not forward-confirmed, so it should be treated as a weak signal.
Is 186.205.21.143 a VPN, proxy, or data center address?
186.205.21.143 is classified as a mobile network and a residential network based on network ownership and behavioural analysis.