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CIDR Range

1.72.128.0/17

32.8K IPs /17 NTT DOCOMO, INC. AS9605 Japan APNIC
Addresses
32,768
32.8K
IP Range
1.72.128.0
→ 1.72.255.255
Sub-ranges
5+
within this block
PTR Density
100.0%
32.8K 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.

76/100
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 1.72.128.0/17

CIDRIPsOrganizationASNCountry
1.72.192.0/18 16.4K NTT DOCOMO, INC. AS9605 JP
1.72.128.0/19 8.2K NTT DOCOMO, INC. AS9605 JP
1.72.160.0/19 8.2K NTT DOCOMO, INC. AS9605 JP
1.72.128.0/20 4.1K NTT DOCOMO, INC. AS9605 JP
1.72.144.0/20 4.1K NTT DOCOMO, INC. AS9605 JP

Geolocation

First 256 of 32,768 IP addresses in 1.72.128.0/17

1.72.128.0 1.72.128.1 1.72.128.2 1.72.128.3 1.72.128.4 1.72.128.5 1.72.128.6 1.72.128.7 1.72.128.8 1.72.128.9 1.72.128.10 1.72.128.11 1.72.128.12 1.72.128.13 1.72.128.14 1.72.128.15 1.72.128.16 1.72.128.17 1.72.128.18 1.72.128.19 1.72.128.20 1.72.128.21 1.72.128.22 1.72.128.23 1.72.128.24 1.72.128.25 1.72.128.26 1.72.128.27 1.72.128.28 1.72.128.29 1.72.128.30 1.72.128.31 1.72.128.32 1.72.128.33 1.72.128.34 1.72.128.35 1.72.128.36 1.72.128.37 1.72.128.38 1.72.128.39 1.72.128.40 1.72.128.41 1.72.128.42 1.72.128.43 1.72.128.44 1.72.128.45 1.72.128.46 1.72.128.47 1.72.128.48 1.72.128.49 1.72.128.50 1.72.128.51 1.72.128.52 1.72.128.53 1.72.128.54 1.72.128.55 1.72.128.56 1.72.128.57 1.72.128.58 1.72.128.59 1.72.128.60 1.72.128.61 1.72.128.62 1.72.128.63 1.72.128.64 1.72.128.65 1.72.128.66 1.72.128.67 1.72.128.68 1.72.128.69 1.72.128.70 1.72.128.71 1.72.128.72 1.72.128.73 1.72.128.74 1.72.128.75 1.72.128.76 1.72.128.77 1.72.128.78 1.72.128.79 1.72.128.80 1.72.128.81 1.72.128.82 1.72.128.83 1.72.128.84 1.72.128.85 1.72.128.86 1.72.128.87 1.72.128.88 1.72.128.89 1.72.128.90 1.72.128.91 1.72.128.92 1.72.128.93 1.72.128.94 1.72.128.95 1.72.128.96 1.72.128.97 1.72.128.98 1.72.128.99 1.72.128.100 1.72.128.101 1.72.128.102 1.72.128.103 1.72.128.104 1.72.128.105 1.72.128.106 1.72.128.107 1.72.128.108 1.72.128.109 1.72.128.110 1.72.128.111 1.72.128.112 1.72.128.113 1.72.128.114 1.72.128.115 1.72.128.116 1.72.128.117 1.72.128.118 1.72.128.119 1.72.128.120 1.72.128.121 1.72.128.122 1.72.128.123 1.72.128.124 1.72.128.125 1.72.128.126 1.72.128.127 1.72.128.128 1.72.128.129 1.72.128.130 1.72.128.131 1.72.128.132 1.72.128.133 1.72.128.134 1.72.128.135 1.72.128.136 1.72.128.137 1.72.128.138 1.72.128.139 1.72.128.140 1.72.128.141 1.72.128.142 1.72.128.143 1.72.128.144 1.72.128.145 1.72.128.146 1.72.128.147 1.72.128.148 1.72.128.149 1.72.128.150 1.72.128.151 1.72.128.152 1.72.128.153 1.72.128.154 1.72.128.155 1.72.128.156 1.72.128.157 1.72.128.158 1.72.128.159 1.72.128.160 1.72.128.161 1.72.128.162 1.72.128.163 1.72.128.164 1.72.128.165 1.72.128.166 1.72.128.167 1.72.128.168 1.72.128.169 1.72.128.170 1.72.128.171 1.72.128.172 1.72.128.173 1.72.128.174 1.72.128.175 1.72.128.176 1.72.128.177 1.72.128.178 1.72.128.179 1.72.128.180 1.72.128.181 1.72.128.182 1.72.128.183 1.72.128.184 1.72.128.185 1.72.128.186 1.72.128.187 1.72.128.188 1.72.128.189 1.72.128.190 1.72.128.191 1.72.128.192 1.72.128.193 1.72.128.194 1.72.128.195 1.72.128.196 1.72.128.197 1.72.128.198 1.72.128.199 1.72.128.200 1.72.128.201 1.72.128.202 1.72.128.203 1.72.128.204 1.72.128.205 1.72.128.206 1.72.128.207 1.72.128.208 1.72.128.209 1.72.128.210 1.72.128.211 1.72.128.212 1.72.128.213 1.72.128.214 1.72.128.215 1.72.128.216 1.72.128.217 1.72.128.218 1.72.128.219 1.72.128.220 1.72.128.221 1.72.128.222 1.72.128.223 1.72.128.224 1.72.128.225 1.72.128.226 1.72.128.227 1.72.128.228 1.72.128.229 1.72.128.230 1.72.128.231 1.72.128.232 1.72.128.233 1.72.128.234 1.72.128.235 1.72.128.236 1.72.128.237 1.72.128.238 1.72.128.239 1.72.128.240 1.72.128.241 1.72.128.242 1.72.128.243 1.72.128.244 1.72.128.245 1.72.128.246 1.72.128.247 1.72.128.248 1.72.128.249 1.72.128.250 1.72.128.251 1.72.128.252 1.72.128.253 1.72.128.254 1.72.128.255 + 32.5K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 1.0.0.0/8.

Announced prefix
1.0.0.0/8
Origin AS
AS45820
Announcement samples
4
Last seen
2026-08-12 12:13:47

Frequently Asked Questions

What is 1.72.128.0/17?

1.72.128.0/17 is a CIDR network block containing 32,768 IPv4 addresses (from 1.72.128.0 to 1.72.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 1.72.128.0/17 network?

The 1.72.128.0/17 range is allocated to NTT DOCOMO, INC. and announced via AS9605 from Japan.

Last updated: 2026-09-02 16:54:06 UTC
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