121.153.60.137
IP Intelligence Briefing: 121.153.60.137
Date: 2026-06-06
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**1. Core Profile**
- Risk Score: Moderate (50/100)
- Ownership:
- ASN: 4766 (IP Manager)
- Mobile Carrier: KT Corporation (Korea Telecom)
- Geolocation: South Korea, Gyeonggi-do, Hwaseong-si (35.91°N, 127.77°E)
- Network Role: Mobile device (LTE/5G) | No public services (no open ports, TLS certs, or HTTP banners)
- Threat Indicators: None detected (no malware, spam, or abuse signals).
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**2. Observation History**
- Recent Activity:
- Minimal risk signals (0.25 operator score) with no persistent malicious behavior.
- Last scan: 2026-06-02 (no open ports, no TLS/HTTP activity).
- Trend: No significant changes in risk or threat indicators over 21 observations.
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**3. Relationships & Subnet**
- Linked Entities:
- Subnet: `121.153.60.0/24` (abuse density: 0, classified as "mostly clean").
- Network: KORNET-KR (Korea Telecom infrastructure).
- Neighbors: No active or risky sibling IPs in the subnet.
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**4. Actionable Insights**
- SOC Recommendation:
- Monitor for unexpected changes in network behavior or new threat indicators.
- Validate mobile IP legitimacy via KT's carrier records if suspicious activity arises.
- No immediate firewall rules or blocking actions required due to lack of malicious signals.
Conclusion: 121.153.60.137 is a legitimate mobile IP with no current threat activity. Continued monitoring is advised for anomalies.
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*Generated by IPDebrief Threat Intelligence Platform*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | IP Manager |
| ASN | AS4766 |
| Network Name | — |
| CIDR Block | — |
| RIR | APNIC |
| Country | — |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR Record | No PTR |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Present |
☁️ Network Classification
| Infrastructure | Mobile |
| 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 | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 43% | 2 | 5 |
| routing | 17% | 1 | 1 |
| services | 24% | 2 | 3 |
| ownership | 20% | 2 | 3 |
| reputation | 27% | 1 | 4 |
| geolocation | 21% | 2 | 2 |
| Overall | 25% | 10 | 18 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-07 23:03:35 UTC |
| Last Seen | 2026-06-22 11:44:44 UTC |
| Profile Built | 2026-06-22 12:03:22 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 30 |
Full dossier details are available via our API.