121.136.135.137
IP Intelligence Dossier
Your IP: 216.73.216.123
🤖 Witness AIThis summary was generated by AI and may contain inaccuracies. Verify critical details independently.
IP Intelligence Briefing: 121.136.135.137
*Generated via IPDebrief Analysis*
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**1. Core Profile**
- Risk Score: 80 (High Risk)
- Ownership: Registered to IP Manager (ASN 4766, APNIC).
- Geolocation: South Korea (KR), Suwon, Gyeonggi-do. Coordinates: 35.91°N, 127.77°E.
- Network Role: Mobile device (LTE/5G, KT Corporation).
- Threat Indicators: No active malicious indicators, but listed in 5/8 DNSBLs (DNS-based Blacklist).
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**2. Network Behavior**
- Open Services: SSH (Port 22, TCP).
- Control Plane:
- BGP Prefix: `121.128.0.0/12`
- DNSSEC Valid: Yes.
- Route Stability: Unstable (route changes detected).
- Subnet: `121.136.135.137/24` (0 abuse density, no active neighbors).
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**3. Threat Observations**
- History: Minimal changes over 30 days. Latest observation (June 6, 2026):
- DNSSEC validation confirmed.
- No spam, attacker, or Tor activity.
- Campaigns: No correlated malicious campaigns or certificate matches.
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**4. Relationships**
- Network Affiliation: Linked to KORNET-KR (APNIC network).
- Provider: No direct ISP provider data available.
- DNS: No PTR records or domain associations.
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**5. Recommendations**
- Monitor: Track DNSBL listings and SSH access patterns.
- Secure: Restrict SSH access to trusted sources (e.g., firewall rules).
- Investigate: Verify KORNET-KR network legitimacy and subnet abuse density.
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*End of Briefing*
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 | 20% (Poor) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Mobile |
| Service Purpose | Single-Service Host |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 22 | ssh | tcp | — |
| Closed Ports | 25, 80, 443, 3389, 8080, 8443 (1 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
No certificate
Issued by —
N/A
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 36% | 2 | 4 |
| routing | 25% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 26% | 2 | 3 |
| reputation | 28% | 1 | 3 |
| geolocation | 21% | 2 | 2 |
| Overall | 25% | 10 | 15 |
Coverage: 6/6 dimensions · Data sufficiency: sufficient
| 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 | 2026-06-26 18:10:32 UTC |
| Profile Built | 2026-06-22 12:00:06 UTC |
| Data Freshness | Live |
| Signal Types | 18 |
| Total Observations | 21 |
🔍 18 signal types · 21 observations collected
This report is generated from 18+ independent intelligence signals including
ownership records, DNS analysis, BGP routing, TLS certificates, port scanning, threat feeds,
behavioral fingerprinting, and more.
Full dossier details are available via our API.
Full dossier details are available via our API.
ℹ️ About This Report
All data shown is publicly available network metadata — IP addresses do not reliably identify individuals.
Assessments are probabilistic and should not be used as sole basis for access control decisions.
To report an issue or request data review, contact admin@ipdebrief.com.