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CIDR Range

223.81.0.0/16

65.5K IPs /16 Shandong Mobile Communication Company Limited AS24444 China APNIC
Addresses
65,536
65.5K
IP Range
223.81.0.0
→ 223.81.255.255
Sub-ranges
5+
within this block
PTR Density
0.0%
0 of 65.5K 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 v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 223.81.0.0/16

CIDRIPsOrganizationASNCountry
223.81.0.0/17 32.8K Shandong Mobile Communication Company Limited AS24444 CN
223.81.192.0/18 16.4K Shandong Mobile Communication Company Limited AS24444 CN
223.81.160.0/19 8.2K Shandong Mobile Communication Company Limited AS24444 CN
223.81.128.0/20 4.1K Shandong Mobile Communication Company Limited AS24444 CN
223.81.144.0/20 4.1K Shandong Mobile Communication Company Limited AS24444 CN

Geolocation

First 256 of 65,536 IP addresses in 223.81.0.0/16

223.81.0.0 223.81.0.1 223.81.0.2 223.81.0.3 223.81.0.4 223.81.0.5 223.81.0.6 223.81.0.7 223.81.0.8 223.81.0.9 223.81.0.10 223.81.0.11 223.81.0.12 223.81.0.13 223.81.0.14 223.81.0.15 223.81.0.16 223.81.0.17 223.81.0.18 223.81.0.19 223.81.0.20 223.81.0.21 223.81.0.22 223.81.0.23 223.81.0.24 223.81.0.25 223.81.0.26 223.81.0.27 223.81.0.28 223.81.0.29 223.81.0.30 223.81.0.31 223.81.0.32 223.81.0.33 223.81.0.34 223.81.0.35 223.81.0.36 223.81.0.37 223.81.0.38 223.81.0.39 223.81.0.40 223.81.0.41 223.81.0.42 223.81.0.43 223.81.0.44 223.81.0.45 223.81.0.46 223.81.0.47 223.81.0.48 223.81.0.49 223.81.0.50 223.81.0.51 223.81.0.52 223.81.0.53 223.81.0.54 223.81.0.55 223.81.0.56 223.81.0.57 223.81.0.58 223.81.0.59 223.81.0.60 223.81.0.61 223.81.0.62 223.81.0.63 223.81.0.64 223.81.0.65 223.81.0.66 223.81.0.67 223.81.0.68 223.81.0.69 223.81.0.70 223.81.0.71 223.81.0.72 223.81.0.73 223.81.0.74 223.81.0.75 223.81.0.76 223.81.0.77 223.81.0.78 223.81.0.79 223.81.0.80 223.81.0.81 223.81.0.82 223.81.0.83 223.81.0.84 223.81.0.85 223.81.0.86 223.81.0.87 223.81.0.88 223.81.0.89 223.81.0.90 223.81.0.91 223.81.0.92 223.81.0.93 223.81.0.94 223.81.0.95 223.81.0.96 223.81.0.97 223.81.0.98 223.81.0.99 223.81.0.100 223.81.0.101 223.81.0.102 223.81.0.103 223.81.0.104 223.81.0.105 223.81.0.106 223.81.0.107 223.81.0.108 223.81.0.109 223.81.0.110 223.81.0.111 223.81.0.112 223.81.0.113 223.81.0.114 223.81.0.115 223.81.0.116 223.81.0.117 223.81.0.118 223.81.0.119 223.81.0.120 223.81.0.121 223.81.0.122 223.81.0.123 223.81.0.124 223.81.0.125 223.81.0.126 223.81.0.127 223.81.0.128 223.81.0.129 223.81.0.130 223.81.0.131 223.81.0.132 223.81.0.133 223.81.0.134 223.81.0.135 223.81.0.136 223.81.0.137 223.81.0.138 223.81.0.139 223.81.0.140 223.81.0.141 223.81.0.142 223.81.0.143 223.81.0.144 223.81.0.145 223.81.0.146 223.81.0.147 223.81.0.148 223.81.0.149 223.81.0.150 223.81.0.151 223.81.0.152 223.81.0.153 223.81.0.154 223.81.0.155 223.81.0.156 223.81.0.157 223.81.0.158 223.81.0.159 223.81.0.160 223.81.0.161 223.81.0.162 223.81.0.163 223.81.0.164 223.81.0.165 223.81.0.166 223.81.0.167 223.81.0.168 223.81.0.169 223.81.0.170 223.81.0.171 223.81.0.172 223.81.0.173 223.81.0.174 223.81.0.175 223.81.0.176 223.81.0.177 223.81.0.178 223.81.0.179 223.81.0.180 223.81.0.181 223.81.0.182 223.81.0.183 223.81.0.184 223.81.0.185 223.81.0.186 223.81.0.187 223.81.0.188 223.81.0.189 223.81.0.190 223.81.0.191 223.81.0.192 223.81.0.193 223.81.0.194 223.81.0.195 223.81.0.196 223.81.0.197 223.81.0.198 223.81.0.199 223.81.0.200 223.81.0.201 223.81.0.202 223.81.0.203 223.81.0.204 223.81.0.205 223.81.0.206 223.81.0.207 223.81.0.208 223.81.0.209 223.81.0.210 223.81.0.211 223.81.0.212 223.81.0.213 223.81.0.214 223.81.0.215 223.81.0.216 223.81.0.217 223.81.0.218 223.81.0.219 223.81.0.220 223.81.0.221 223.81.0.222 223.81.0.223 223.81.0.224 223.81.0.225 223.81.0.226 223.81.0.227 223.81.0.228 223.81.0.229 223.81.0.230 223.81.0.231 223.81.0.232 223.81.0.233 223.81.0.234 223.81.0.235 223.81.0.236 223.81.0.237 223.81.0.238 223.81.0.239 223.81.0.240 223.81.0.241 223.81.0.242 223.81.0.243 223.81.0.244 223.81.0.245 223.81.0.246 223.81.0.247 223.81.0.248 223.81.0.249 223.81.0.250 223.81.0.251 223.81.0.252 223.81.0.253 223.81.0.254 223.81.0.255 + 65.3K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 223.80.0.0/15.

Announced prefix
223.80.0.0/15
Origin AS
AS24444
Announcement samples
3,892
Last seen
2026-07-23 18:56:45

RIR Ownership History

Atom feed ⇲

Allocation changes captured weekly from regional internet registry (RIR) delegation files.

Date Event From To
2026-05-10 New Allocation — CN

Frequently Asked Questions

What is 223.81.0.0/16?

223.81.0.0/16 is a CIDR network block containing 65,536 IPv4 addresses (from 223.81.0.0 to 223.81.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 223.81.0.0/16 network?

The 223.81.0.0/16 range is allocated to Shandong Mobile Communication Company Limited and announced via AS24444 from China.

Last updated: 2026-07-23 19:10:33 UTC
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