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
- Isp allocation +5
- Trust score 76 / 100
Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 121.157.4.0/22
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 121.157.6.0/23 | 512 | Korea Telecom | AS4766 | KR |
| 121.157.4.0/24 | 256 | GORayNet | AS9862 | KR |
| 121.157.5.0/24 | 256 | Korea Telecom | AS4766 | KR |
Geolocation
First and last addresses in 121.157.4.0/22
121.157.4.0/22 runs from 121.157.4.0 to 121.157.7.255.
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 121.152.0.0/13.
RIR Ownership History
Atom feed ⇲Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours.
| Date | Event | From | To |
|---|---|---|---|
| 2026-05-10 | New Allocation | — | KR |
Frequently Asked Questions
What is 121.157.4.0/22?
121.157.4.0/22 is a CIDR network block containing 1,024 IPv4 addresses (from 121.157.4.0 to 121.157.7.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 121.157.4.0/22 network?
The 121.157.4.0/22 range is allocated to Korea Telecom and announced via AS4766 from South Korea.
