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 121.21.0.0/16
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 121.21.0.0/17 | 32.8K | CHINA UNICOM China169 Backbone | AS4837 | CN |
| 121.21.128.0/17 | 32.8K | CHINA UNICOM China169 Backbone | AS4837 | CN |
First and last addresses in 121.21.0.0/16
121.21.0.0/16 runs from 121.21.0.0 to 121.21.255.255.
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 121.16.0.0/13.
Frequently Asked Questions
What is 121.21.0.0/16?
121.21.0.0/16 is a CIDR network block containing 65,536 IPv4 addresses (from 121.21.0.0 to 121.21.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 121.21.0.0/16 network?
The 121.21.0.0/16 range is allocated to CHINA UNICOM China169 Backbone and announced via AS4837 from China.
