171.231.183.235
171.231.183.235 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 6, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
## IP INTELLIGENCE BRIEFING: 171.231.183.235
Classification: Low Risk Residential IP (Vietnam)
Priority: Monitor (Low)
Date: 2026-07-28
EXECUTIVE SUMMARY
IP address 171.231.183.235 is a residential ADSL endpoint from Viettel Vietnam's network infrastructure. The IP demonstrates low-risk characteristics with no active threat indicators. Classification indicates firewalled status with no exposed services.
OWNERSHIP & GEOLOCATION
- Network: VIETTEL-VN (ASN 7552, IRT-VNNIC-AP)
- CIDR Block: 171.224.0.0/11
- Country: Vietnam (VN)
- Region: Da Nang
- DNS PTR: dynamic-ip-adsl.viettel.vn
RISK ASSESSMENT
- Risk Score: 25 (Low)
- Abuse Confidence: Not elevated
- Blacklist Status: Listed on 1 of 8 DNSBL checks
- Threat Indicators: None detected
- Not Tor exit node
- Not known attacker
- Not spam source
- No known campaign affiliations
- Persistence: No persistent malicious activity observed
NETWORK BEHAVIOR
- Service Status: Firewalled / No Services
- Open Ports: None
- TLS/HTTP: No certificates or HTTP titles detected
- Network Role: Residential ISP endpoint
NEIGHBORHOOD ANALYSIS (171.231.183.0/24)
- Subnet Risk Distribution: 0 high, 4 medium, 6 low
- Abuse Density: 0.0909 (Minimal)
- Notable Neighbors:
- 171.231.183.42, 171.231.183.200: Risk Score 55 (Medium)
- 171.231.183.94, 171.231.183.49: Risk Score 40-55 (Medium)
- Remaining siblings: Risk Score 0-15 (Low)
OBSERVATION HISTORY (18 Records)
Recent observations (2026-07-28) confirm:
- Subnet classification: mostly_clean
- No ownership changes detected
- No threat persistence observed
- Geolocation consistent with Vietnam (Da Nang)
RELATIONSHIP MAPPING
- Network Association: VIETTEL-VN (Viettel Vietnam backbone)
- DNS Associations: dynamic-ip-adsl.viettel.vn (multiple records)
RECOMMENDED ACTIONS
1. Traffic Policy: Allow with standard residential IP filtering
2. Monitoring Level: Standard baseline monitoring
3. Firewall Rules: No immediate blocking required
4. Threat Hunting: No immediate threat indicators warrant aggressive blocking
5. Context: Consider correlating with medium-risk neighbors (171.231.183.42, 171.231.183.200) if lateral movement concerns exist
CONCLUSION
This IP represents a legitimate residential endpoint with no active malicious indicators. Risk score of 25 falls below typical threat thresholds. No immediate defensive action required beyond standard baseline 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.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 | 171.231.176.0/21 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 30% | 2 | 4 |
| routing | 8% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 17% | 2 | 3 |
| reputation | 25% | 1 | 4 |
| geolocation | 17% | 2 | 3 |
| Overall | 18% | 10 | 17 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-17 05:00:09 UTC |
| Last Seen | 2026-10-06 05:22:43 UTC |
| Profile Built | 2026-10-06 05:23:06 UTC |
| Data Freshness | Live |
| Signal Types | 23 |
| Total Observations | 25 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 171.231.183.235
Who owns the IP address 171.231.183.235?
171.231.183.235 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 171.231.183.235 located?
Geolocation data places 171.231.183.235 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 171.231.183.235 malicious or safe?
171.231.183.235 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 171.231.183.235?
The reverse DNS (PTR) record for 171.231.183.235 is dynamic-ip-adsl.viettel.vn. This hostname is not forward-confirmed, so it should be treated as a weak signal.