# 171.231.178.39 — IP Intelligence Summary

171.231.178.39 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 October 10, 2026, IPDebrief rates it Low Risk (25/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/171.231.178.39
- Last updated: 2026-10-10

## 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: Da Nang
- Region: Da Nang
- 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 (25/100)
- Blocklist listings: 0
- Suspicious activity indicators: no
- Spam source: no

## Reverse DNS

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

## Analyst narrative

\# INTELLIGENCE BRIEFING: IP Address 171.231.178.39/32

**Classification:** LOW RISK

**Report Date:** 2026-07-28

**Analyst:** IPDebrief Intelligence Team

\---

\## EXECUTIVE SUMMARY

Target IP 171.231.178.39 presents a low-risk profile with no active threat indicators. The address is associated with Viettel telecommunications infrastructure in Da Nang, Vietnam. No malicious campaigns, blacklists, or persistent threat behaviors observed. Recommended action: Allow traffic with standard monitoring.

\---

\## OWNERSHIP & INFRASTRUCTURE

| Attribute | Value |

|-----------|-------|

| **ASN** | 7552 (IRT-VNNIC-AP) |

| **Organization** | VIETTEL-VN |

| **CIDR Block** | 171.224.0.0/11 |

| **RIR** | APNIC |

| **Country** | Vietnam (VN) |

| **City/Region** | Da Nang |

| **Classification** | Firewalled / No Services |

The IP belongs to Viettel's network infrastructure. Network classification indicates no open services detected, consistent with residential or business-class connectivity rather than public-facing hosting.

\---

\## THREAT ASSESSMENT

| Metric | Status |

|--------|--------|

| **Risk Score** | 0 (Low Risk) |

| **Abuse Confidence** | Not applicable |

| **Blacklist Count** | 0 |

| **Known Attacker** | No |

| **Spam Source** | No |

| **Tor Exit Node** | No |

| **Threat Feeds** | None |

| **Campaign Associations** | None |

**Key Findings:**

\- Zero threat indicators across all monitoring sources

\- No association with known malicious campaigns

\- Clean reputation across 17 observation signals

\- No persistent malicious behavior detected

\---

\## NETWORK NEIGHBORHOOD ANALYSIS

**Subnet:** 171.231.178.0/24

**Total Siblings:** 9

**Abuse Density:** 0 (0.0%)

**Neighbor Risk Distribution:**

\- High Risk: 0

\- Medium Risk: 1 (171.231.178.49)

\- Low Risk: 8

**Notable Neighbors:**

| IP Address | Risk Score | Authority Score |

|------------|------------|-----------------|

| 171.231.178.49 | 49 | 50 |

| 171.231.178.7 | 25 | 50 |

| 171.231.178.54 | 25 | 50 |

| 171.231.178.160 | 0 | 50 |

The /24 subnet exhibits low abuse density with only one medium-risk neighbor. No threat siblings identified.

\---

\## OBSERVATION HISTORY

**Total Observations:** 17 signals (as of 2026-07-28)

**Recent Signal Summary:**

\- **Subnet Classification:** Clean (abuse density: 0)

\- **Ownership Changes:** 0

\- **Geolocation:** Vietnam (confidence: 52%)

\- **DNS Resolution:** viettel.vn (domain association confirmed)

\- **Threat Persistence:** Not observed

Temporal analysis indicates stable ownership with no signs of malicious persistence or reputation degradation.

\---

\## RELATIONSHIP ANALYSIS

**Associated Entities:** 4 relationships identified

1. **Network Association:** VIETTEL-VN (Same Network)

2. **DNS Association:** dynamic-ip-adsl.viettel.vn (PTR hostname)

No external organization, certificate, or hostname relationships beyond Viettel infrastructure.

\---

\## SERVICES & DNS

| Component | Status |

|-----------|--------|

| **Open Ports** | None detected |

| **HTTP Services** | None |

| **TLS Certificates** | None |

| **PTR Hostname** | dynamic-ip-adsl.viettel.vn |

| **DNSSEC** | Valid |

| **Email Auth** | SPF: Yes, DMARC: Yes |

Forward DNS resolution confirmed to viettel.vn domain. No reverse DNS validation available.

\---

\## CONTROL PLANE DATA

\- **BGP Prefix:** 171.231.176.0/21

\- **Route Stability:** Unstable

\- **DNSSEC:** Valid

\- **DNSBL Listings:** 0 of 8 total lists

\- **Hop Count:** 22 hops to destination

\- **Transit Networks:** Comcast, Cogent

\---

\## RECOMMENDED ACTIONS

**Firewall Rules:** None required

**Monitoring Level:** Standard

**Threat Response:** Not applicable

This IP address does not warrant restrictive firewall rules based on current risk assessment. Standard logging and monitoring is sufficient.

\---

\## ANALYST NOTES

Target IP 171.231.178.39 represents normal Viettel residential/business connectivity infrastructure. The absence of open services, clean threat profile, and low-risk neighborhood context indicate legitimate operational use. No escalation or blocking actions recommended.

**Confidence Level:** High

**Next Review:** Periodic monitoring sufficient

## Nearby addresses

- 171.231.178.7 (https://ipdebrief.com/171.231.178.7)
- 171.231.178.29 (https://ipdebrief.com/171.231.178.29)
- 171.231.178.34 (https://ipdebrief.com/171.231.178.34)
- 171.231.178.49 (https://ipdebrief.com/171.231.178.49)
- 171.231.178.54 (https://ipdebrief.com/171.231.178.54)
- 171.231.178.70 (https://ipdebrief.com/171.231.178.70)
- 171.231.178.79 (https://ipdebrief.com/171.231.178.79)
- 171.231.178.91 (https://ipdebrief.com/171.231.178.91)
- 171.231.178.160 (https://ipdebrief.com/171.231.178.160)
- 171.231.178.189 (https://ipdebrief.com/171.231.178.189)
- 171.231.178.206 (https://ipdebrief.com/171.231.178.206)
- 171.231.178.226 (https://ipdebrief.com/171.231.178.226)

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Source: IPDebrief, "171.231.178.39 IP intelligence", https://ipdebrief.com/171.231.178.39, updated 2026-10-10. Assessments are probabilistic.