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CIDR Range

5.138.128.0/17

32.8K IPs /17 Rostelecom AS12389 Russia RIPE
Addresses
32,768
32.8K
IP Range
5.138.128.0
→ 5.138.255.255
Sub-ranges
13+
within this block
PTR Density
0.4%
128 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.

78/100
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 5.138.128.0/17

CIDRIPsOrganizationASNCountry
5.138.128.0/19 8.2K Rostelecom AS12389 RU
5.138.160.0/19 8.2K Rostelecom AS12389 RU
5.138.128.0/20 4.1K Rostelecom AS12389 RU
5.138.224.0/20 4.1K Rostelecom AS12389 RU
5.138.208.0/20 4.1K Rostelecom AS12389 RU
5.138.192.0/20 4.1K Rostelecom AS12389 RU
5.138.176.0/20 4.1K Rostelecom AS12389 RU
5.138.144.0/20 4.1K Rostelecom AS12389 RU
5.138.240.0/20 4.1K Rostelecom AS12389 RU
5.138.192.0/21 2.0K Rostelecom AS12389 RU
5.138.168.0/21 2.0K Rostelecom AS12389 RU
5.138.200.0/21 2.0K Rostelecom AS12389 RU
5.138.160.0/21 2.0K Rostelecom AS12389 RU

Geolocation

First 256 of 32,768 IP addresses in 5.138.128.0/17

5.138.128.0 5.138.128.1 5.138.128.2 5.138.128.3 5.138.128.4 5.138.128.5 5.138.128.6 5.138.128.7 5.138.128.8 5.138.128.9 5.138.128.10 5.138.128.11 5.138.128.12 5.138.128.13 5.138.128.14 5.138.128.15 5.138.128.16 5.138.128.17 5.138.128.18 5.138.128.19 5.138.128.20 5.138.128.21 5.138.128.22 5.138.128.23 5.138.128.24 5.138.128.25 5.138.128.26 5.138.128.27 5.138.128.28 5.138.128.29 5.138.128.30 5.138.128.31 5.138.128.32 5.138.128.33 5.138.128.34 5.138.128.35 5.138.128.36 5.138.128.37 5.138.128.38 5.138.128.39 5.138.128.40 5.138.128.41 5.138.128.42 5.138.128.43 5.138.128.44 5.138.128.45 5.138.128.46 5.138.128.47 5.138.128.48 5.138.128.49 5.138.128.50 5.138.128.51 5.138.128.52 5.138.128.53 5.138.128.54 5.138.128.55 5.138.128.56 5.138.128.57 5.138.128.58 5.138.128.59 5.138.128.60 5.138.128.61 5.138.128.62 5.138.128.63 5.138.128.64 5.138.128.65 5.138.128.66 5.138.128.67 5.138.128.68 5.138.128.69 5.138.128.70 5.138.128.71 5.138.128.72 5.138.128.73 5.138.128.74 5.138.128.75 5.138.128.76 5.138.128.77 5.138.128.78 5.138.128.79 5.138.128.80 5.138.128.81 5.138.128.82 5.138.128.83 5.138.128.84 5.138.128.85 5.138.128.86 5.138.128.87 5.138.128.88 5.138.128.89 5.138.128.90 5.138.128.91 5.138.128.92 5.138.128.93 5.138.128.94 5.138.128.95 5.138.128.96 5.138.128.97 5.138.128.98 5.138.128.99 5.138.128.100 5.138.128.101 5.138.128.102 5.138.128.103 5.138.128.104 5.138.128.105 5.138.128.106 5.138.128.107 5.138.128.108 5.138.128.109 5.138.128.110 5.138.128.111 5.138.128.112 5.138.128.113 5.138.128.114 5.138.128.115 5.138.128.116 5.138.128.117 5.138.128.118 5.138.128.119 5.138.128.120 5.138.128.121 5.138.128.122 5.138.128.123 5.138.128.124 5.138.128.125 5.138.128.126 5.138.128.127 5.138.128.128 5.138.128.129 5.138.128.130 5.138.128.131 5.138.128.132 5.138.128.133 5.138.128.134 5.138.128.135 5.138.128.136 5.138.128.137 5.138.128.138 5.138.128.139 5.138.128.140 5.138.128.141 5.138.128.142 5.138.128.143 5.138.128.144 5.138.128.145 5.138.128.146 5.138.128.147 5.138.128.148 5.138.128.149 5.138.128.150 5.138.128.151 5.138.128.152 5.138.128.153 5.138.128.154 5.138.128.155 5.138.128.156 5.138.128.157 5.138.128.158 5.138.128.159 5.138.128.160 5.138.128.161 5.138.128.162 5.138.128.163 5.138.128.164 5.138.128.165 5.138.128.166 5.138.128.167 5.138.128.168 5.138.128.169 5.138.128.170 5.138.128.171 5.138.128.172 5.138.128.173 5.138.128.174 5.138.128.175 5.138.128.176 5.138.128.177 5.138.128.178 5.138.128.179 5.138.128.180 5.138.128.181 5.138.128.182 5.138.128.183 5.138.128.184 5.138.128.185 5.138.128.186 5.138.128.187 5.138.128.188 5.138.128.189 5.138.128.190 5.138.128.191 5.138.128.192 5.138.128.193 5.138.128.194 5.138.128.195 5.138.128.196 5.138.128.197 5.138.128.198 5.138.128.199 5.138.128.200 5.138.128.201 5.138.128.202 5.138.128.203 5.138.128.204 5.138.128.205 5.138.128.206 5.138.128.207 5.138.128.208 5.138.128.209 5.138.128.210 5.138.128.211 5.138.128.212 5.138.128.213 5.138.128.214 5.138.128.215 5.138.128.216 5.138.128.217 5.138.128.218 5.138.128.219 5.138.128.220 5.138.128.221 5.138.128.222 5.138.128.223 5.138.128.224 5.138.128.225 5.138.128.226 5.138.128.227 5.138.128.228 5.138.128.229 5.138.128.230 5.138.128.231 5.138.128.232 5.138.128.233 5.138.128.234 5.138.128.235 5.138.128.236 5.138.128.237 5.138.128.238 5.138.128.239 5.138.128.240 5.138.128.241 5.138.128.242 5.138.128.243 5.138.128.244 5.138.128.245 5.138.128.246 5.138.128.247 5.138.128.248 5.138.128.249 5.138.128.250 5.138.128.251 5.138.128.252 5.138.128.253 5.138.128.254 5.138.128.255 + 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
5.138.128.0/17
Origin AS
AS12389
Announcement samples
43,219
Last seen
2026-07-23 09:58:10

Frequently Asked Questions

What is 5.138.128.0/17?

5.138.128.0/17 is a CIDR network block containing 32,768 IPv4 addresses (from 5.138.128.0 to 5.138.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 5.138.128.0/17 network?

The 5.138.128.0/17 range is allocated to Rostelecom and announced via AS12389 from Russia.

Last updated: 2026-07-23 10:40:31 UTC
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