121.133.203.240/28
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
- Trust score 71 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Geolocation
All 16 IP addresses in 121.133.203.240/28
BGP Routing
Live BGP anomalies →This block is announced in BGP, observed across our RIPE RIS collectors.
RIR Ownership History
Atom feed ⇲Allocation changes captured weekly from regional internet registry (RIR) delegation files.
| Date | Event | From | To |
|---|---|---|---|
| 2026-05-10 | New Allocation | — | KR |
Frequently Asked Questions
What is 121.133.203.240/28?
121.133.203.240/28 is a CIDR network block containing 16 IPv4 addresses (from 121.133.203.240 to 121.133.203.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 121.133.203.240/28 network?
The 121.133.203.240/28 range is allocated to Gyeonggi-do Yeoju Office of Education and announced via AS38399 from South Korea.
How many IP addresses are in 121.133.203.240/28?
121.133.203.240/28 contains exactly 16 usable IPv4 addresses. A /28 prefix length means 16 addresses are covered by this single routing entry.
