171.231.188.105
171.231.188.105 is an IPv4 address operated by IRT-VNNIC-AP (AS7552), geolocated to Da Nang, Vietnam. Its reverse DNS name is dynamic-ip-adsl.viettel.vn. As of September 28, 2026, IPDebrief rates it Moderate Risk (65/100); no anonymizing service was detected.
# IPDebrief Intelligence Briefing
Target: 171.231.188.105/32
Date: 2026-07-24
Classification: Moderate Risk
---
## Executive Summary
IP 171.231.188.105 presents a moderate risk profile (Risk Score: 40). The address is geolocated to Chicago, IL, US, but DNS resolution points to Vietnam (viettel.vn), indicating geo-inconsistency. The IP shows no active services and is currently firewalled with no open ports. Recent observations indicate stable, low-threat behavior with no persistent malicious activity detected.
---
## Risk Assessment
| Metric | Value | Assessment |
|---|---|---|
| Risk Score | 40 | Moderate |
| Provider Score | 0 | Neutral |
| Authority Score | 0 | Neutral |
| Operator Score | 0.1304 | Minimal |
| DNSBL Listed | 2/8 lists | Low |
| Abuse Confidence | None detected | Low |
---
## Technical Profile
- Control Plane: Origin ASN 7552, BGP Prefix 171.231.184.0/21
- Routing: Route stability flagged as false; 5 timed-out hops in traceroute
- Transit Networks: Comcast, Cogent
- DNS: PTR resolves to dynamic-ip-adsl.viettel.vn; forward resolution unconfirmed
- Services: None detected (firewalled); no open ports, TLS, or HTTP services
- Email Auth: SPF and DMARC records present
---
## Threat Indicators
- Known Attacker: No
- Tor Exit Node: No
- Spam Source: No
- Campaign Correlation: None detected
- Threat Feeds: Empty
- Blacklist Count: 0
---
## Historical Behavior (41 Observations)
Recent signal history indicates stable operational patterns:
- Operator scores consistently rated "Minimal" across multiple observations
- No escalation in threat indicators observed
- No persistent malicious behavior detected
- Ownership stability: No changes recorded
---
## Network Context
Subnet Analysis (171.231.188.0/24):
- Total Siblings: 10
- Abuse Density: 0%
- Risk Distribution: 1 medium, 9 low
- Notable Neighbor: 171.231.188.131 (Risk Score: 40) — similar profile
Relationship Graph:
- 36 DNS associations, all resolving to dynamic-ip-adsl.viettel.vn
- Indicates dynamic IP allocation within Viettel infrastructure
---
## Recommended Actions
1. Traffic Monitoring: Maintain monitoring for outbound connections; current services are inactive
2. Geo-validation: Investigate geo-discrepancy between US geolocation and Vietnamese DNS records
3. Subnet Awareness: Monitor 171.231.188.0/24 subnet for coordinated activity; 171.231.188.131 shows similar risk profile
4. Firewall Rules: No specific blocking required based on current risk profile
5. Email Validation: SPF/DMARC records present; monitor for abuse
---
## Analyst Notes
The IP exhibits characteristics typical of dynamic residential or small business infrastructure. DNS misalignment between geolocation and hostname warrants periodic validation. Low abuse density in the /24 subnet suggests localized activity rather than coordinated campaign infrastructure. No immediate threat action required; continue passive monitoring.
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.vndynamic-adsl.viettel.vn |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | 3/3 domains |
| DMARC | 3/3 domains |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 3 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 | |||
| 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 | 27% | 2 | 3 |
| routing | 13% | 1 | 1 |
| services | 13% | 1 | 2 |
| ownership | 27% | 2 | 3 |
| reputation | 26% | 1 | 3 |
| geolocation | 27% | 2 | 3 |
| Overall | 22% | 9 | 15 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-06 12:08:33 UTC |
| Last Seen | 2026-10-06 08:27:52 UTC |
| Profile Built | 2026-09-28 02:52:55 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 30 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 171.231.188.105
Who owns the IP address 171.231.188.105?
171.231.188.105 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 171.231.188.105 located?
Geolocation data places 171.231.188.105 in Da Nang, Da Nang, 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 171.231.188.105 malicious or safe?
171.231.188.105 currently carries a moderate risk assessment, meaning some indicators warrant caution, but the evidence is mixed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 171.231.188.105?
The reverse DNS (PTR) record for 171.231.188.105 is dynamic-ip-adsl.viettel.vn. This hostname is not forward-confirmed, so it should be treated as a weak signal.