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CIDR Range

117.81.240.0/21

2.0K IPs /21 Chinanet AS4134 China APNIC
Addresses
2,048
2.0K
IP Range
117.81.240.0
→ 117.81.247.255
Sub-ranges
4+
within this block
PTR Density
0.0%
0 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.

71/100
Moderate
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 117.81.240.0/21

CIDRIPsOrganizationASNCountry
117.81.244.0/22 1.0K Chinanet AS4134 CN
117.81.242.0/23 512 Chinanet AS4134 CN
117.81.240.0/24 256 Chinanet AS4134 CN
117.81.241.0/24 256 CHINATELECOM Jiangsu province Suzhou 5G network AS140292 CN

Geolocation

First 256 of 2,048 IP addresses in 117.81.240.0/21

117.81.240.0 117.81.240.1 117.81.240.2 117.81.240.3 117.81.240.4 117.81.240.5 117.81.240.6 117.81.240.7 117.81.240.8 117.81.240.9 117.81.240.10 117.81.240.11 117.81.240.12 117.81.240.13 117.81.240.14 117.81.240.15 117.81.240.16 117.81.240.17 117.81.240.18 117.81.240.19 117.81.240.20 117.81.240.21 117.81.240.22 117.81.240.23 117.81.240.24 117.81.240.25 117.81.240.26 117.81.240.27 117.81.240.28 117.81.240.29 117.81.240.30 117.81.240.31 117.81.240.32 117.81.240.33 117.81.240.34 117.81.240.35 117.81.240.36 117.81.240.37 117.81.240.38 117.81.240.39 117.81.240.40 117.81.240.41 117.81.240.42 117.81.240.43 117.81.240.44 117.81.240.45 117.81.240.46 117.81.240.47 117.81.240.48 117.81.240.49 117.81.240.50 117.81.240.51 117.81.240.52 117.81.240.53 117.81.240.54 117.81.240.55 117.81.240.56 117.81.240.57 117.81.240.58 117.81.240.59 117.81.240.60 117.81.240.61 117.81.240.62 117.81.240.63 117.81.240.64 117.81.240.65 117.81.240.66 117.81.240.67 117.81.240.68 117.81.240.69 117.81.240.70 117.81.240.71 117.81.240.72 117.81.240.73 117.81.240.74 117.81.240.75 117.81.240.76 117.81.240.77 117.81.240.78 117.81.240.79 117.81.240.80 117.81.240.81 117.81.240.82 117.81.240.83 117.81.240.84 117.81.240.85 117.81.240.86 117.81.240.87 117.81.240.88 117.81.240.89 117.81.240.90 117.81.240.91 117.81.240.92 117.81.240.93 117.81.240.94 117.81.240.95 117.81.240.96 117.81.240.97 117.81.240.98 117.81.240.99 117.81.240.100 117.81.240.101 117.81.240.102 117.81.240.103 117.81.240.104 117.81.240.105 117.81.240.106 117.81.240.107 117.81.240.108 117.81.240.109 117.81.240.110 117.81.240.111 117.81.240.112 117.81.240.113 117.81.240.114 117.81.240.115 117.81.240.116 117.81.240.117 117.81.240.118 117.81.240.119 117.81.240.120 117.81.240.121 117.81.240.122 117.81.240.123 117.81.240.124 117.81.240.125 117.81.240.126 117.81.240.127 117.81.240.128 117.81.240.129 117.81.240.130 117.81.240.131 117.81.240.132 117.81.240.133 117.81.240.134 117.81.240.135 117.81.240.136 117.81.240.137 117.81.240.138 117.81.240.139 117.81.240.140 117.81.240.141 117.81.240.142 117.81.240.143 117.81.240.144 117.81.240.145 117.81.240.146 117.81.240.147 117.81.240.148 117.81.240.149 117.81.240.150 117.81.240.151 117.81.240.152 117.81.240.153 117.81.240.154 117.81.240.155 117.81.240.156 117.81.240.157 117.81.240.158 117.81.240.159 117.81.240.160 117.81.240.161 117.81.240.162 117.81.240.163 117.81.240.164 117.81.240.165 117.81.240.166 117.81.240.167 117.81.240.168 117.81.240.169 117.81.240.170 117.81.240.171 117.81.240.172 117.81.240.173 117.81.240.174 117.81.240.175 117.81.240.176 117.81.240.177 117.81.240.178 117.81.240.179 117.81.240.180 117.81.240.181 117.81.240.182 117.81.240.183 117.81.240.184 117.81.240.185 117.81.240.186 117.81.240.187 117.81.240.188 117.81.240.189 117.81.240.190 117.81.240.191 117.81.240.192 117.81.240.193 117.81.240.194 117.81.240.195 117.81.240.196 117.81.240.197 117.81.240.198 117.81.240.199 117.81.240.200 117.81.240.201 117.81.240.202 117.81.240.203 117.81.240.204 117.81.240.205 117.81.240.206 117.81.240.207 117.81.240.208 117.81.240.209 117.81.240.210 117.81.240.211 117.81.240.212 117.81.240.213 117.81.240.214 117.81.240.215 117.81.240.216 117.81.240.217 117.81.240.218 117.81.240.219 117.81.240.220 117.81.240.221 117.81.240.222 117.81.240.223 117.81.240.224 117.81.240.225 117.81.240.226 117.81.240.227 117.81.240.228 117.81.240.229 117.81.240.230 117.81.240.231 117.81.240.232 117.81.240.233 117.81.240.234 117.81.240.235 117.81.240.236 117.81.240.237 117.81.240.238 117.81.240.239 117.81.240.240 117.81.240.241 117.81.240.242 117.81.240.243 117.81.240.244 117.81.240.245 117.81.240.246 117.81.240.247 117.81.240.248 117.81.240.249 117.81.240.250 117.81.240.251 117.81.240.252 117.81.240.253 117.81.240.254 117.81.240.255 + 1.8K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 117.81.128.0/17.

Announced prefix
117.81.128.0/17
Origin AS
AS140292
Announcement samples
2,356
Last seen
2026-08-20 19:28:50

Frequently Asked Questions

What is 117.81.240.0/21?

117.81.240.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 117.81.240.0 to 117.81.247.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 117.81.240.0/21 network?

The 117.81.240.0/21 range is allocated to Chinanet and announced via AS4134 from China.

Last updated: 2026-09-02 04:39:12 UTC
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