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CIDR Range

101.251.192.0/21

2.0K IPs /21 China APNIC
Addresses
2,048
2.0K
Sub-ranges
8+
within this block
PTR Density
2.7%
56 of 2.0K IPs have PTR

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.

76/100
Moderate
How this score is built

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 101.251.192.0/21

Geolocation

First and last addresses in 101.251.192.0/21

101.251.192.0/21 runs from 101.251.192.0 to 101.251.199.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 101.251.192.0/19.

Announced prefix
Origin AS
Announcement samples
27,253
Last seen
2026-10-27 09:44:13

Frequently Asked Questions

What is 101.251.192.0/21?

101.251.192.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 101.251.192.0 to 101.251.199.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 101.251.192.0/21 network?

The 101.251.192.0/21 range is allocated to an unknown organization from China.

Last updated: 2026-10-27 09:54:05 UTC
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