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CIDR Range

8.221.128.0/17

32.8K IPs /17 Japan APNIC
Addresses
32,768
32.8K
IP Range
8.221.128.0
→ 8.221.255.255
Sub-ranges
12+
within this block
PTR Density
0.0%
0 of 32.8K 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 8.221.128.0/17

CIDRIPsOrganizationASNCountry
8.221.192.0/18 16.4K Alibaba US Technology Co., Ltd. AS45102 SG
8.221.192.0/18 16.4K — AS45102 JP
8.221.160.0/19 8.2K Alibaba US Technology Co., Ltd. AS45102 SG
8.221.160.0/19 8.2K — AS45102 JP
8.221.128.0/20 4.1K — AS45102 JP
8.221.128.0/20 4.1K Alibaba US Technology Co., Ltd. AS45102 SG
8.221.144.0/21 2.0K Alibaba US Technology Co., Ltd. AS45102 SG
8.221.144.0/21 2.0K — AS45102 JP
8.221.152.0/22 1.0K Alibaba Cloud Singapore Private Limited AS134963 SG
8.221.152.0/22 1.0K — AS134963 JP
8.221.156.0/22 1.0K Alibaba US Technology Co., Ltd. AS45102 SG
8.221.156.0/22 1.0K — AS45102 JP

Geolocation

First 256 of 32,768 IP addresses in 8.221.128.0/17

8.221.128.0 8.221.128.1 8.221.128.2 8.221.128.3 8.221.128.4 8.221.128.5 8.221.128.6 8.221.128.7 8.221.128.8 8.221.128.9 8.221.128.10 8.221.128.11 8.221.128.12 8.221.128.13 8.221.128.14 8.221.128.15 8.221.128.16 8.221.128.17 8.221.128.18 8.221.128.19 8.221.128.20 8.221.128.21 8.221.128.22 8.221.128.23 8.221.128.24 8.221.128.25 8.221.128.26 8.221.128.27 8.221.128.28 8.221.128.29 8.221.128.30 8.221.128.31 8.221.128.32 8.221.128.33 8.221.128.34 8.221.128.35 8.221.128.36 8.221.128.37 8.221.128.38 8.221.128.39 8.221.128.40 8.221.128.41 8.221.128.42 8.221.128.43 8.221.128.44 8.221.128.45 8.221.128.46 8.221.128.47 8.221.128.48 8.221.128.49 8.221.128.50 8.221.128.51 8.221.128.52 8.221.128.53 8.221.128.54 8.221.128.55 8.221.128.56 8.221.128.57 8.221.128.58 8.221.128.59 8.221.128.60 8.221.128.61 8.221.128.62 8.221.128.63 8.221.128.64 8.221.128.65 8.221.128.66 8.221.128.67 8.221.128.68 8.221.128.69 8.221.128.70 8.221.128.71 8.221.128.72 8.221.128.73 8.221.128.74 8.221.128.75 8.221.128.76 8.221.128.77 8.221.128.78 8.221.128.79 8.221.128.80 8.221.128.81 8.221.128.82 8.221.128.83 8.221.128.84 8.221.128.85 8.221.128.86 8.221.128.87 8.221.128.88 8.221.128.89 8.221.128.90 8.221.128.91 8.221.128.92 8.221.128.93 8.221.128.94 8.221.128.95 8.221.128.96 8.221.128.97 8.221.128.98 8.221.128.99 8.221.128.100 8.221.128.101 8.221.128.102 8.221.128.103 8.221.128.104 8.221.128.105 8.221.128.106 8.221.128.107 8.221.128.108 8.221.128.109 8.221.128.110 8.221.128.111 8.221.128.112 8.221.128.113 8.221.128.114 8.221.128.115 8.221.128.116 8.221.128.117 8.221.128.118 8.221.128.119 8.221.128.120 8.221.128.121 8.221.128.122 8.221.128.123 8.221.128.124 8.221.128.125 8.221.128.126 8.221.128.127 8.221.128.128 8.221.128.129 8.221.128.130 8.221.128.131 8.221.128.132 8.221.128.133 8.221.128.134 8.221.128.135 8.221.128.136 8.221.128.137 8.221.128.138 8.221.128.139 8.221.128.140 8.221.128.141 8.221.128.142 8.221.128.143 8.221.128.144 8.221.128.145 8.221.128.146 8.221.128.147 8.221.128.148 8.221.128.149 8.221.128.150 8.221.128.151 8.221.128.152 8.221.128.153 8.221.128.154 8.221.128.155 8.221.128.156 8.221.128.157 8.221.128.158 8.221.128.159 8.221.128.160 8.221.128.161 8.221.128.162 8.221.128.163 8.221.128.164 8.221.128.165 8.221.128.166 8.221.128.167 8.221.128.168 8.221.128.169 8.221.128.170 8.221.128.171 8.221.128.172 8.221.128.173 8.221.128.174 8.221.128.175 8.221.128.176 8.221.128.177 8.221.128.178 8.221.128.179 8.221.128.180 8.221.128.181 8.221.128.182 8.221.128.183 8.221.128.184 8.221.128.185 8.221.128.186 8.221.128.187 8.221.128.188 8.221.128.189 8.221.128.190 8.221.128.191 8.221.128.192 8.221.128.193 8.221.128.194 8.221.128.195 8.221.128.196 8.221.128.197 8.221.128.198 8.221.128.199 8.221.128.200 8.221.128.201 8.221.128.202 8.221.128.203 8.221.128.204 8.221.128.205 8.221.128.206 8.221.128.207 8.221.128.208 8.221.128.209 8.221.128.210 8.221.128.211 8.221.128.212 8.221.128.213 8.221.128.214 8.221.128.215 8.221.128.216 8.221.128.217 8.221.128.218 8.221.128.219 8.221.128.220 8.221.128.221 8.221.128.222 8.221.128.223 8.221.128.224 8.221.128.225 8.221.128.226 8.221.128.227 8.221.128.228 8.221.128.229 8.221.128.230 8.221.128.231 8.221.128.232 8.221.128.233 8.221.128.234 8.221.128.235 8.221.128.236 8.221.128.237 8.221.128.238 8.221.128.239 8.221.128.240 8.221.128.241 8.221.128.242 8.221.128.243 8.221.128.244 8.221.128.245 8.221.128.246 8.221.128.247 8.221.128.248 8.221.128.249 8.221.128.250 8.221.128.251 8.221.128.252 8.221.128.253 8.221.128.254 8.221.128.255 + 32.5K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

This block is announced in BGP, observed across our RIPE RIS collectors.

Announced prefix
8.221.128.0/17
Origin AS
AS45102
Announcement samples
15,517
Last seen
2026-09-15 03:26:12

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 — SG

Frequently Asked Questions

What is 8.221.128.0/17?

8.221.128.0/17 is a CIDR network block containing 32,768 IPv4 addresses (from 8.221.128.0 to 8.221.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 8.221.128.0/17 network?

The 8.221.128.0/17 range is allocated to an unknown organization from Japan.

Last updated: 2026-09-15 03:24:06 UTC
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