CIDR Range

61.240.0.0/20

4.1K IPs /20 CHINA UNICOM China169 Backbone AS4837 China APNIC

Addresses

4,096

4.1K

IP Range

61.240.0.0

→ 61.240.15.255

Sub-ranges

within this block

PTR Density

6.3%

257 of 4.1K 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.

81/100

Trusted

How this score is built

Baseline (neutral) 65
Long-established allocation (25y) +6
Has a reverse-DNS (PTR) record +5
Isp allocation +5
Trust score 81 / 100

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

Geolocation

First and last addresses in 61.240.0.0/20

61.240.0.0/20 runs from 61.240.0.0 to 61.240.15.255.

First 16

61.240.0.0 61.240.0.1 61.240.0.2 61.240.0.3 61.240.0.4 61.240.0.5 61.240.0.6 61.240.0.7 61.240.0.8 61.240.0.9 61.240.0.10 61.240.0.11 61.240.0.12 61.240.0.13 61.240.0.14 61.240.0.15

Last 16

61.240.15.240 61.240.15.241 61.240.15.242 61.240.15.243 61.240.15.244 61.240.15.245 61.240.15.246 61.240.15.247 61.240.15.248 61.240.15.249 61.240.15.250 61.240.15.251 61.240.15.252 61.240.15.253 61.240.15.254 61.240.15.255

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 61.240.0.0/19.

Announced prefix

61.240.0.0/19

Origin AS

AS4837

Announcement samples

31,606

Last seen

2026-11-01 01:50:06

Frequently Asked Questions

What is 61.240.0.0/20?

61.240.0.0/20 is a CIDR network block containing 4,096 IPv4 addresses (from 61.240.0.0 to 61.240.15.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 61.240.0.0/20 network?

The 61.240.0.0/20 range is allocated to CHINA UNICOM China169 Backbone and announced via AS4837 from China.

Last updated: 2026-11-01 01:54:06 UTC