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CIDR Range

158.142.128.0/17

32.8K IPs /17 Colorado State University AS36691 United States ARIN
Addresses
32,768
32.8K
IP Range
158.142.128.0
→ 158.142.255.255
Sub-ranges
4+
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 v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 158.142.128.0/17

CIDRIPsOrganizationASNCountry
158.142.192.0/18 16.4K Colorado State University AS36691 US
158.142.128.0/19 8.2K Colorado State University AS36691 US
158.142.160.0/20 4.1K Colorado State University AS36691 US
158.142.176.0/20 4.1K Colorado State University AS36691 US

Geolocation

First 256 of 32,768 IP addresses in 158.142.128.0/17

158.142.128.0 158.142.128.1 158.142.128.2 158.142.128.3 158.142.128.4 158.142.128.5 158.142.128.6 158.142.128.7 158.142.128.8 158.142.128.9 158.142.128.10 158.142.128.11 158.142.128.12 158.142.128.13 158.142.128.14 158.142.128.15 158.142.128.16 158.142.128.17 158.142.128.18 158.142.128.19 158.142.128.20 158.142.128.21 158.142.128.22 158.142.128.23 158.142.128.24 158.142.128.25 158.142.128.26 158.142.128.27 158.142.128.28 158.142.128.29 158.142.128.30 158.142.128.31 158.142.128.32 158.142.128.33 158.142.128.34 158.142.128.35 158.142.128.36 158.142.128.37 158.142.128.38 158.142.128.39 158.142.128.40 158.142.128.41 158.142.128.42 158.142.128.43 158.142.128.44 158.142.128.45 158.142.128.46 158.142.128.47 158.142.128.48 158.142.128.49 158.142.128.50 158.142.128.51 158.142.128.52 158.142.128.53 158.142.128.54 158.142.128.55 158.142.128.56 158.142.128.57 158.142.128.58 158.142.128.59 158.142.128.60 158.142.128.61 158.142.128.62 158.142.128.63 158.142.128.64 158.142.128.65 158.142.128.66 158.142.128.67 158.142.128.68 158.142.128.69 158.142.128.70 158.142.128.71 158.142.128.72 158.142.128.73 158.142.128.74 158.142.128.75 158.142.128.76 158.142.128.77 158.142.128.78 158.142.128.79 158.142.128.80 158.142.128.81 158.142.128.82 158.142.128.83 158.142.128.84 158.142.128.85 158.142.128.86 158.142.128.87 158.142.128.88 158.142.128.89 158.142.128.90 158.142.128.91 158.142.128.92 158.142.128.93 158.142.128.94 158.142.128.95 158.142.128.96 158.142.128.97 158.142.128.98 158.142.128.99 158.142.128.100 158.142.128.101 158.142.128.102 158.142.128.103 158.142.128.104 158.142.128.105 158.142.128.106 158.142.128.107 158.142.128.108 158.142.128.109 158.142.128.110 158.142.128.111 158.142.128.112 158.142.128.113 158.142.128.114 158.142.128.115 158.142.128.116 158.142.128.117 158.142.128.118 158.142.128.119 158.142.128.120 158.142.128.121 158.142.128.122 158.142.128.123 158.142.128.124 158.142.128.125 158.142.128.126 158.142.128.127 158.142.128.128 158.142.128.129 158.142.128.130 158.142.128.131 158.142.128.132 158.142.128.133 158.142.128.134 158.142.128.135 158.142.128.136 158.142.128.137 158.142.128.138 158.142.128.139 158.142.128.140 158.142.128.141 158.142.128.142 158.142.128.143 158.142.128.144 158.142.128.145 158.142.128.146 158.142.128.147 158.142.128.148 158.142.128.149 158.142.128.150 158.142.128.151 158.142.128.152 158.142.128.153 158.142.128.154 158.142.128.155 158.142.128.156 158.142.128.157 158.142.128.158 158.142.128.159 158.142.128.160 158.142.128.161 158.142.128.162 158.142.128.163 158.142.128.164 158.142.128.165 158.142.128.166 158.142.128.167 158.142.128.168 158.142.128.169 158.142.128.170 158.142.128.171 158.142.128.172 158.142.128.173 158.142.128.174 158.142.128.175 158.142.128.176 158.142.128.177 158.142.128.178 158.142.128.179 158.142.128.180 158.142.128.181 158.142.128.182 158.142.128.183 158.142.128.184 158.142.128.185 158.142.128.186 158.142.128.187 158.142.128.188 158.142.128.189 158.142.128.190 158.142.128.191 158.142.128.192 158.142.128.193 158.142.128.194 158.142.128.195 158.142.128.196 158.142.128.197 158.142.128.198 158.142.128.199 158.142.128.200 158.142.128.201 158.142.128.202 158.142.128.203 158.142.128.204 158.142.128.205 158.142.128.206 158.142.128.207 158.142.128.208 158.142.128.209 158.142.128.210 158.142.128.211 158.142.128.212 158.142.128.213 158.142.128.214 158.142.128.215 158.142.128.216 158.142.128.217 158.142.128.218 158.142.128.219 158.142.128.220 158.142.128.221 158.142.128.222 158.142.128.223 158.142.128.224 158.142.128.225 158.142.128.226 158.142.128.227 158.142.128.228 158.142.128.229 158.142.128.230 158.142.128.231 158.142.128.232 158.142.128.233 158.142.128.234 158.142.128.235 158.142.128.236 158.142.128.237 158.142.128.238 158.142.128.239 158.142.128.240 158.142.128.241 158.142.128.242 158.142.128.243 158.142.128.244 158.142.128.245 158.142.128.246 158.142.128.247 158.142.128.248 158.142.128.249 158.142.128.250 158.142.128.251 158.142.128.252 158.142.128.253 158.142.128.254 158.142.128.255 + 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 158.142.0.0/16.

Announced prefix
158.142.0.0/16
Origin AS
AS36691
Announcement samples
21,703
Last seen
2026-07-18 12:01:28

Frequently Asked Questions

What is 158.142.128.0/17?

158.142.128.0/17 is a CIDR network block containing 32,768 IPv4 addresses (from 158.142.128.0 to 158.142.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 158.142.128.0/17 network?

The 158.142.128.0/17 range is allocated to Colorado State University and announced via AS36691 from United States.

Last updated: 2026-07-18 12:25:31 UTC
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