171.231.187.59
171.231.187.59 is an IPv4 address operated by IRT-VNNIC-AP (AS7552), geolocated to Qui Nhon, Vietnam. Its reverse DNS name is dynamic-ip-adsl.viettel.vn. As of October 5, 2026, IPDebrief rates it Low Risk (25/100); no anonymizing service was detected.
# IP Intelligence Briefing: 171.231.187.59/32
Classification: Low Risk (Score: 25)
Date: 2026-07-27
Prepared: IPDebrief Intelligence Analysis
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## Executive Summary
IP 171.231.187.59 is a residential/corporate dynamic IP address belonging to Viettel Vietnam's broadband infrastructure. The IP demonstrates low risk characteristics with no active threat indicators, no open services, and a clean neighborhood profile. No immediate defensive action required.
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## Ownership and Infrastructure
- Organization: IRT-VNNIC-AP (Viettel Vietnam)
- ASN: 7552 (VIETTEL-VN)
- CIDR Block: 171.224.0.0/11
- Location: Da Nang, Vietnam (VN)
- Network Type: Residential/ISP broadband (dynamic IP)
- Service Status: Firewalled / No active services detected
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## Threat Indicators Assessment
| Category | Status | Details |
|---|---|---|
| **Risk Score** | 25/100 | Low Risk |
| **Abuse Confidence** | N/A | No indicators |
| **Blacklist Count** | 0 | Not listed on major feeds |
| **Tor Exit** | No | Not a Tor exit node |
| **Known Attacker** | No | No attack attribution |
| **Spam Source** | No | Not a spam source |
| **Campaigns** | None | No associated campaigns |
| **DNSBL Listings** | 1/8 | Minor listing present |
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## Network Neighborhood Analysis
Subnet: 171.231.187.0/24
Abuse Density: 0% (Clean)
Total Siblings: 7
Active Siblings: 4
Threat Siblings: 0
Neighbor Risk Distribution:
- High Risk: 0
- Medium Risk: 0
- Low Risk: 6
All neighboring IPs (171.231.187.28, 171.231.187.95, 171.231.187.124, 171.231.187.177, 171.231.187.202, 171.231.187.209) maintain similar low-risk profiles with no abuse density correlation.
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## Observed Services and DNS
- PTR Hostname: dynamic-ip-adsl.viettel.vn
- Forward Resolution: dynamic-ip-adsl.viettel.vn
- Open Ports: None detected
- TLS Certificate: Not present
- HTTP Service: Not active
- Email Authentication: SPF and DMARC records present (viettel.vn)
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## Temporal Behavior
- Ownership Stability: No changes recorded
- Threat Persistence: 0 days
- Threat Observations: 0
- Control Plane: Route stable, DNSSEC valid
- Historical Trend: No escalation of risk signals observed
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## SOC Analyst Recommendations
1. Traffic Policy: Monitor but no block required. Normal ISP broadband traffic pattern.
2. Firewall Rules: No specific rules recommended. Standard inbound filtering applies.
3. Threat Hunting: No active threat indicators warranting investigation.
4. Relationship Monitoring: Track associated hostname dynamic-ip-adsl.viettel.vn for broader context if needed.
5. Priority: LOW - No immediate action required.
---
## Evidence Summary
All indicators point to legitimate ISP infrastructure. The IP is part of Viettel's residential/corporate broadband allocation and shows no malicious activity patterns. The single DNSBL listing is minor and consistent with ISP network operations.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | IRT-VNNIC-AP |
| ASN | AS7552 |
| Network Name | VIETTEL-VN |
| CIDR Block | 171.224.0.0/11 |
| RIR | APNIC |
| Country | VN |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | dynamic-ip-adsl.viettel.vn |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | dynamic-ip-adsl.viettel.vn |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | 2/2 domains |
| DMARC | 2/2 domains |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 2 domains |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 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 | AS7552 |
| Network Prefix | 171.231.184.0/21 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 23% | 2 | 4 |
| routing | 8% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 17% | 2 | 3 |
| reputation | 8% | 1 | 2 |
| geolocation | 17% | 2 | 3 |
| Overall | 14% | 10 | 15 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-12 14:58:38 UTC |
| Last Seen | 2026-10-05 04:56:45 UTC |
| Profile Built | 2026-10-05 04:57:36 UTC |
| Data Freshness | Live |
| Signal Types | 23 |
| Total Observations | 25 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 171.231.187.59
Who owns the IP address 171.231.187.59?
171.231.187.59 is registered to IRT-VNNIC-AP. The address falls within the 171.224.0.0/11 network block. Registration is held at APNIC.
Where is 171.231.187.59 located?
Geolocation data places 171.231.187.59 in Qui Nhon, 31, Vietnam. The local time zone is Asia/Ho_Chi_Minh. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 171.231.187.59 malicious or safe?
171.231.187.59 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 171.231.187.59?
The reverse DNS (PTR) record for 171.231.187.59 is dynamic-ip-adsl.viettel.vn. This hostname is not forward-confirmed, so it should be treated as a weak signal.