Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Long-established allocation (20y) +6
- Not on any threat blocklist +5
- Enterprise allocation +4
- Trust score 80 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network Allocation for 121.78.28.198
- CIDR range
- 121.78.28.0/24
- IP range (int)
- 2,035,162,112 — 2,035,162,367
- Prefix length
- /24
- Organization
- Zenlayer Inc
- ASN
- AS21859
- ASN name
- Zenlayer Inc
- Location
- South Korea
- Coordinates
- 37.511200, 126.974100
- Accuracy radius
- 200 km
- Regional Internet Registry
- APNIC
- Allocated
- 2006-06-20
- Data source(s)
- maxmind_asn, ipinfo_lite, maxmind_city, maxmind_country
- Last updated
- 2026-06-09 06:05:32
BGP Routing
Live BGP anomalies →Origin AS announcing the most-specific prefix that covers this IP, observed across our RIPE RIS collectors.
Frequently Asked Questions
Who owns 121.78.28.198?
121.78.28.198 is allocated to Zenlayer Inc (AS21859), registered in South Korea.
Where is 121.78.28.198 located?
The geolocation for 121.78.28.198 maps to South Korea based on MaxMind GeoLite2 data. Accuracy depends on the provider and may represent the ISP's regional hub rather than the exact endpoint.
What network is 121.78.28.198 on?
121.78.28.198 belongs to the 121.78.28.0/24 network block announced by AS21859. This range contains 256 addresses.
Does 121.78.28.198 have a reverse DNS record?
Reverse DNS (PTR) records are resolved live when you visit this page. If a PTR record exists, it appears in the Reverse DNS field above. PTR records map IP addresses back to hostnames and are commonly used for email authentication and network diagnostics.
Neighbors
Other addresses in the same /24.
