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 (23y) +6
- Isp allocation +5
- Trust score 76 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Geolocation
All 16 IP addresses in 221.164.4.0/28
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 221.160.0.0/13.
Frequently Asked Questions
What is 221.164.4.0/28?
221.164.4.0/28 is a CIDR network block containing 16 IPv4 addresses (from 221.164.4.0 to 221.164.4.15). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 221.164.4.0/28 network?
The 221.164.4.0/28 range is allocated to Korea Telecom and announced via AS4766 from South Korea.
How many IP addresses are in 221.164.4.0/28?
221.164.4.0/28 contains exactly 16 usable IPv4 addresses. A /28 prefix length means 16 addresses are covered by this single routing entry.
