219.121.128.197
219.121.128.197 is an IPv4 address announced by AS59108, with approximate network location Nishio, Japan. Its reverse DNS name is d-219-121-128-197.ftth.katch.ne.jp. As of November 12, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Japan Network Information Center |
| ASN | AS59108 |
| Network Name | KATCH-NET |
| CIDR Block | 219.121.128.0/20 |
| RIR | APNIC |
| Network registration country | JP |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | d-219-121-128-197.ftth.katch.ne.jp |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | d-219-121-128-197.ftth.katch.ne.jp |
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 | 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 | — |
🛡️ Public Network Snapshot
| Origin ASN | AS59108 |
| Network Prefix | 219.121.128.0/20 |
| Route mapping | Found |
| Certificates in transparency logs | 0 certificates |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 27% | 2 | 4 |
| routing | 8% | 1 | 1 |
| services | 23% | 2 | 2 |
| ownership | 23% | 2 | 4 |
| reputation | 20% | 1 | 3 |
| geolocation | 23% | 2 | 4 |
| Overall | 21% | 10 | 18 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Stale
| First Seen | 2026-07-18 11:34:41 UTC |
| Last Seen | 2026-10-07 00:52:07 UTC |
| Profile Built | 2026-11-12 00:23:20 UTC |
| Data Freshness | Stale |
| Signal Types | 23 |
| Total Observations | 24 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 219.121.128.197
Who owns the IP address 219.121.128.197?
219.121.128.197 is registered to Japan Network Information Center. The address falls within the 219.121.128.0/20 network block. Registration is held at APNIC.
Where is 219.121.128.197 located?
Geolocation data places 219.121.128.197 in Nishio, Aichi, 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 219.121.128.197 malicious or safe?
219.121.128.197 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 is the hostname for 219.121.128.197?
The reverse DNS (PTR) record for 219.121.128.197 is d-219-121-128-197.ftth.katch.ne.jp. This hostname is forward-confirmed, meaning it resolves back to the same address.