221.138.100.123
221.138.100.123 is an IPv4 address operated by SKB-AS-KR - SK Broadband Co Ltd, KR (AS9318), with approximate network location Seongdong-gu, South Korea. As of November 14, 2026, IPDebrief rates it Low Risk (15/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | IRT-KRNIC-KR |
| ASN | AS9318 |
| Network Name | broadNnet-KR |
| CIDR Block | 221.138.0.0/15 |
| RIR | APNIC |
| Network registration country | KR |
| Routing operator | SKB-AS-KR - SK Broadband Co Ltd, KR |
| 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 Posture
Results describe the queried names. SPF, DMARC and CAA are domain policies, not requirements for every IP. DNSSEC here describes reverse DNS; inconclusive validation does not mean unsigned.
Not assessed: 0 conclusive IP DNS checks.
| caa | Not applicable |
| spf | Not checked |
| dmarc | Not checked |
| dnssec | Unknown / lookup inconclusive 123.100.138.221.in-addr.arpa |
| fcrDns | Not applicable |
☁️ 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 | |||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS9318 |
| Network Prefix | 221.138.0.0/15 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 8% | 1 | 1 |
| routing | 8% | 1 | 1 |
| services | 8% | 1 | 1 |
| ownership | 17% | 2 | 3 |
| reputation | 0% | 0 | 0 |
| geolocation | 8% | 1 | 1 |
| Overall | 8% | 6 | 7 |
| Data Coherence | Consistent (100%) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-08 00:06:43 UTC |
| Last Seen | 2026-11-14 10:00:09 UTC |
| Profile Built | 2026-11-14 10:14:42 UTC |
| Data Freshness | Live |
| Signal Types | 14 |
| Total Observations | 16 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 221.138.100.123
Who owns the IP address 221.138.100.123?
221.138.100.123 is registered to IRT-KRNIC-KR. The address falls within the 221.138.0.0/15 network block. Registration is held at APNIC.
Where is 221.138.100.123 located?
Geolocation data places 221.138.100.123 in Seongdong-gu, Seoul, South Korea. The local time zone is Asia/Seoul. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 221.138.100.123 malicious or safe?
221.138.100.123 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.