47.104.0.0/13 CIDR Lookup — 524.3K IPs Owned…

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.

80/100

Trusted

How this score is built

Baseline (neutral) 65
Long-established allocation (37y) +6
Has a reverse-DNS (PTR) record +5
Enterprise allocation +4
Trust score 80 / 100

Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 47.104.0.0/13

CIDR	IPs	Organization	ASN	Country
47.104.0.0/15	131.1K	Hangzhou Alibaba Advertising Co.,Ltd.	AS37963	CN
47.106.0.0/15	131.1K	Hangzhou Alibaba Advertising Co.,Ltd.	AS37963	CN
47.108.0.0/15	131.1K	Hangzhou Alibaba Advertising Co.,Ltd.	AS37963	CN
47.110.0.0/15	131.1K	Hangzhou Alibaba Advertising Co.,Ltd.	AS37963	CN

First 256 of 524,288 IP addresses in 47.104.0.0/13

47.104.0.0 47.104.0.1 47.104.0.2 47.104.0.3 47.104.0.4 47.104.0.5 47.104.0.6 47.104.0.7 47.104.0.8 47.104.0.9 47.104.0.10 47.104.0.11 47.104.0.12 47.104.0.13 47.104.0.14 47.104.0.15 47.104.0.16 47.104.0.17 47.104.0.18 47.104.0.19 47.104.0.20 47.104.0.21 47.104.0.22 47.104.0.23 47.104.0.24 47.104.0.25 47.104.0.26 47.104.0.27 47.104.0.28 47.104.0.29 47.104.0.30 47.104.0.31 47.104.0.32 47.104.0.33 47.104.0.34 47.104.0.35 47.104.0.36 47.104.0.37 47.104.0.38 47.104.0.39 47.104.0.40 47.104.0.41 47.104.0.42 47.104.0.43 47.104.0.44 47.104.0.45 47.104.0.46 47.104.0.47 47.104.0.48 47.104.0.49 47.104.0.50 47.104.0.51 47.104.0.52 47.104.0.53 47.104.0.54 47.104.0.55 47.104.0.56 47.104.0.57 47.104.0.58 47.104.0.59 47.104.0.60 47.104.0.61 47.104.0.62 47.104.0.63 47.104.0.64 47.104.0.65 47.104.0.66 47.104.0.67 47.104.0.68 47.104.0.69 47.104.0.70 47.104.0.71 47.104.0.72 47.104.0.73 47.104.0.74 47.104.0.75 47.104.0.76 47.104.0.77 47.104.0.78 47.104.0.79 47.104.0.80 47.104.0.81 47.104.0.82 47.104.0.83 47.104.0.84 47.104.0.85 47.104.0.86 47.104.0.87 47.104.0.88 47.104.0.89 47.104.0.90 47.104.0.91 47.104.0.92 47.104.0.93 47.104.0.94 47.104.0.95 47.104.0.96 47.104.0.97 47.104.0.98 47.104.0.99 47.104.0.100 47.104.0.101 47.104.0.102 47.104.0.103 47.104.0.104 47.104.0.105 47.104.0.106 47.104.0.107 47.104.0.108 47.104.0.109 47.104.0.110 47.104.0.111 47.104.0.112 47.104.0.113 47.104.0.114 47.104.0.115 47.104.0.116 47.104.0.117 47.104.0.118 47.104.0.119 47.104.0.120 47.104.0.121 47.104.0.122 47.104.0.123 47.104.0.124 47.104.0.125 47.104.0.126 47.104.0.127 47.104.0.128 47.104.0.129 47.104.0.130 47.104.0.131 47.104.0.132 47.104.0.133 47.104.0.134 47.104.0.135 47.104.0.136 47.104.0.137 47.104.0.138 47.104.0.139 47.104.0.140 47.104.0.141 47.104.0.142 47.104.0.143 47.104.0.144 47.104.0.145 47.104.0.146 47.104.0.147 47.104.0.148 47.104.0.149 47.104.0.150 47.104.0.151 47.104.0.152 47.104.0.153 47.104.0.154 47.104.0.155 47.104.0.156 47.104.0.157 47.104.0.158 47.104.0.159 47.104.0.160 47.104.0.161 47.104.0.162 47.104.0.163 47.104.0.164 47.104.0.165 47.104.0.166 47.104.0.167 47.104.0.168 47.104.0.169 47.104.0.170 47.104.0.171 47.104.0.172 47.104.0.173 47.104.0.174 47.104.0.175 47.104.0.176 47.104.0.177 47.104.0.178 47.104.0.179 47.104.0.180 47.104.0.181 47.104.0.182 47.104.0.183 47.104.0.184 47.104.0.185 47.104.0.186 47.104.0.187 47.104.0.188 47.104.0.189 47.104.0.190 47.104.0.191 47.104.0.192 47.104.0.193 47.104.0.194 47.104.0.195 47.104.0.196 47.104.0.197 47.104.0.198 47.104.0.199 47.104.0.200 47.104.0.201 47.104.0.202 47.104.0.203 47.104.0.204 47.104.0.205 47.104.0.206 47.104.0.207 47.104.0.208 47.104.0.209 47.104.0.210 47.104.0.211 47.104.0.212 47.104.0.213 47.104.0.214 47.104.0.215 47.104.0.216 47.104.0.217 47.104.0.218 47.104.0.219 47.104.0.220 47.104.0.221 47.104.0.222 47.104.0.223 47.104.0.224 47.104.0.225 47.104.0.226 47.104.0.227 47.104.0.228 47.104.0.229 47.104.0.230 47.104.0.231 47.104.0.232 47.104.0.233 47.104.0.234 47.104.0.235 47.104.0.236 47.104.0.237 47.104.0.238 47.104.0.239 47.104.0.240 47.104.0.241 47.104.0.242 47.104.0.243 47.104.0.244 47.104.0.245 47.104.0.246 47.104.0.247 47.104.0.248 47.104.0.249 47.104.0.250 47.104.0.251 47.104.0.252 47.104.0.253 47.104.0.254 47.104.0.255 + 524.0K 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

47.104.0.0/13

Origin AS

AS37963

Announcement samples

16,011

Last seen

2026-07-18 10:24:59

RIR Ownership History

Atom feed ⇲

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

Date	Event	From	To	RIR
2026-05-10	RIR Transfer	arin	apnic	apnic

Frequently Asked Questions

What is 47.104.0.0/13?

47.104.0.0/13 is a CIDR network block containing 524,288 IPv4 addresses (from 47.104.0.0 to 47.111.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 47.104.0.0/13 network?

The 47.104.0.0/13 range is allocated to Hangzhou Alibaba Advertising Co.,Ltd. and announced via AS37963 from China.