203.137.133.37
203.137.133.37 is an IPv4 address announced by AS4694, with approximate network location Japan. As of October 19, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Japan Network Information Center |
| ASN | AS4694 |
| Network Name | GENIEE-NET |
| CIDR Block | 203.137.133.0/24 |
| RIR | APNIC |
| Network registration country | JP |
| 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.
| spf | Not checked |
| dmarc | Not checked |
| fcrDns | Not checked |
| dnssec | Not checked |
| caa | Not checked |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Web Server |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 80 | http | tcp | — |
| 443 | https | tcp | — |
| Closed Ports | 22, 25, 3389, 8080, 8443 (2 open / 7 scanned) | ||
| Server | Web server detected |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | *.1242.com1242.com |
| Valid From | 2018-03-07T00:00:00+00:00 |
| Valid Until | 2019-04-11T23:59:59+00:00 |
| TLS Protocol | Tls12 |
| Cipher Suite | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 |
| Signature Algorithm | sha256RSA |
| Validity Period | 400 days |
🛡️ Public Network Snapshot
| Origin ASN | AS4694 |
| Network Prefix | 203.137.128.0/18 |
| Route mapping | Found |
| HSTS | Not detected |
| CSP | Not detected |
| HTTP/2 | Enabled |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 35% | 2 | 2 |
| routing | 25% | 1 | 1 |
| services | 35% | 2 | 2 |
| ownership | 0% | 0 | 0 |
| reputation | 25% | 1 | 1 |
| geolocation | 25% | 1 | 1 |
| Overall | 24% | 7 | 7 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-16 17:48:40 UTC |
| Last Seen | 2026-11-10 12:28:05 UTC |
| Profile Built | 2026-10-19 17:57:32 UTC |
| Data Freshness | Live |
| Signal Types | 17 |
| Total Observations | 18 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 203.137.133.37
Who owns the IP address 203.137.133.37?
203.137.133.37 is registered to Japan Network Information Center. The address falls within the 203.137.133.0/24 network block. Registration is held at APNIC.
Where is 203.137.133.37 located?
Geolocation data places 203.137.133.37 in Japan. The local time zone is Asia/Tokyo. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 203.137.133.37 malicious or safe?
203.137.133.37 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.
What ports are open on 203.137.133.37?
Responsive ports observed on 203.137.133.37 include 80, 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.