# 171.231.183.235 — IP Intelligence Summary

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.

- Canonical page: https://ipdebrief.com/171.231.183.235
- Last updated: 2026-10-06

## Ownership

- Organization: IRT-VNNIC-AP
- Network name: VIETTEL-VN
- Allocated block: 171.224.0.0/11
- ASN: AS7552 (https://ipdebrief.com/asn/7552)
- Regional registry: APNIC

## Location

- City: Qui Nhon
- Region: 31
- Country: Vietnam
- Time zone: Asia/Ho_Chi_Minh

## Network classification

- Infrastructure type: —
- Datacenter / hosting: no
- Residential: no
- Mobile: no
- Anycast: no
- Tor exit node: no
- VPN: no
- Proxy: no

## Risk assessment

- Assessment: Low Risk (0/100)
- Blocklist listings: 0
- Suspicious activity indicators: no
- Spam source: no

## Reverse DNS

- dynamic-ip-adsl.viettel.vn
- Forward-confirmed: no

## Analyst narrative

\## 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.

## Nearby addresses

- 171.231.183.33 (https://ipdebrief.com/171.231.183.33)
- 171.231.183.42 (https://ipdebrief.com/171.231.183.42)
- 171.231.183.45 (https://ipdebrief.com/171.231.183.45)
- 171.231.183.49 (https://ipdebrief.com/171.231.183.49)
- 171.231.183.54 (https://ipdebrief.com/171.231.183.54)
- 171.231.183.72 (https://ipdebrief.com/171.231.183.72)
- 171.231.183.83 (https://ipdebrief.com/171.231.183.83)
- 171.231.183.90 (https://ipdebrief.com/171.231.183.90)
- 171.231.183.94 (https://ipdebrief.com/171.231.183.94)
- 171.231.183.127 (https://ipdebrief.com/171.231.183.127)
- 171.231.183.143 (https://ipdebrief.com/171.231.183.143)
- 171.231.183.152 (https://ipdebrief.com/171.231.183.152)

---

Source: IPDebrief, "171.231.183.235 IP intelligence", https://ipdebrief.com/171.231.183.235, updated 2026-10-06. Assessments are probabilistic.