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CIDR Range

104.156.0.0/21

2.0K IPs /21 SANTA ROSA TELEPHONE COOPERATIVE INC AS32391 United States ARIN
Addresses
2,048
2.0K
IP Range
104.156.0.0
→ 104.156.7.255
Sub-ranges
0+
within this block
PTR Density
0.0%
0 of 2.0K 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.

68/100
Moderate
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Geolocation

First 256 of 2,048 IP addresses in 104.156.0.0/21

104.156.0.0 104.156.0.1 104.156.0.2 104.156.0.3 104.156.0.4 104.156.0.5 104.156.0.6 104.156.0.7 104.156.0.8 104.156.0.9 104.156.0.10 104.156.0.11 104.156.0.12 104.156.0.13 104.156.0.14 104.156.0.15 104.156.0.16 104.156.0.17 104.156.0.18 104.156.0.19 104.156.0.20 104.156.0.21 104.156.0.22 104.156.0.23 104.156.0.24 104.156.0.25 104.156.0.26 104.156.0.27 104.156.0.28 104.156.0.29 104.156.0.30 104.156.0.31 104.156.0.32 104.156.0.33 104.156.0.34 104.156.0.35 104.156.0.36 104.156.0.37 104.156.0.38 104.156.0.39 104.156.0.40 104.156.0.41 104.156.0.42 104.156.0.43 104.156.0.44 104.156.0.45 104.156.0.46 104.156.0.47 104.156.0.48 104.156.0.49 104.156.0.50 104.156.0.51 104.156.0.52 104.156.0.53 104.156.0.54 104.156.0.55 104.156.0.56 104.156.0.57 104.156.0.58 104.156.0.59 104.156.0.60 104.156.0.61 104.156.0.62 104.156.0.63 104.156.0.64 104.156.0.65 104.156.0.66 104.156.0.67 104.156.0.68 104.156.0.69 104.156.0.70 104.156.0.71 104.156.0.72 104.156.0.73 104.156.0.74 104.156.0.75 104.156.0.76 104.156.0.77 104.156.0.78 104.156.0.79 104.156.0.80 104.156.0.81 104.156.0.82 104.156.0.83 104.156.0.84 104.156.0.85 104.156.0.86 104.156.0.87 104.156.0.88 104.156.0.89 104.156.0.90 104.156.0.91 104.156.0.92 104.156.0.93 104.156.0.94 104.156.0.95 104.156.0.96 104.156.0.97 104.156.0.98 104.156.0.99 104.156.0.100 104.156.0.101 104.156.0.102 104.156.0.103 104.156.0.104 104.156.0.105 104.156.0.106 104.156.0.107 104.156.0.108 104.156.0.109 104.156.0.110 104.156.0.111 104.156.0.112 104.156.0.113 104.156.0.114 104.156.0.115 104.156.0.116 104.156.0.117 104.156.0.118 104.156.0.119 104.156.0.120 104.156.0.121 104.156.0.122 104.156.0.123 104.156.0.124 104.156.0.125 104.156.0.126 104.156.0.127 104.156.0.128 104.156.0.129 104.156.0.130 104.156.0.131 104.156.0.132 104.156.0.133 104.156.0.134 104.156.0.135 104.156.0.136 104.156.0.137 104.156.0.138 104.156.0.139 104.156.0.140 104.156.0.141 104.156.0.142 104.156.0.143 104.156.0.144 104.156.0.145 104.156.0.146 104.156.0.147 104.156.0.148 104.156.0.149 104.156.0.150 104.156.0.151 104.156.0.152 104.156.0.153 104.156.0.154 104.156.0.155 104.156.0.156 104.156.0.157 104.156.0.158 104.156.0.159 104.156.0.160 104.156.0.161 104.156.0.162 104.156.0.163 104.156.0.164 104.156.0.165 104.156.0.166 104.156.0.167 104.156.0.168 104.156.0.169 104.156.0.170 104.156.0.171 104.156.0.172 104.156.0.173 104.156.0.174 104.156.0.175 104.156.0.176 104.156.0.177 104.156.0.178 104.156.0.179 104.156.0.180 104.156.0.181 104.156.0.182 104.156.0.183 104.156.0.184 104.156.0.185 104.156.0.186 104.156.0.187 104.156.0.188 104.156.0.189 104.156.0.190 104.156.0.191 104.156.0.192 104.156.0.193 104.156.0.194 104.156.0.195 104.156.0.196 104.156.0.197 104.156.0.198 104.156.0.199 104.156.0.200 104.156.0.201 104.156.0.202 104.156.0.203 104.156.0.204 104.156.0.205 104.156.0.206 104.156.0.207 104.156.0.208 104.156.0.209 104.156.0.210 104.156.0.211 104.156.0.212 104.156.0.213 104.156.0.214 104.156.0.215 104.156.0.216 104.156.0.217 104.156.0.218 104.156.0.219 104.156.0.220 104.156.0.221 104.156.0.222 104.156.0.223 104.156.0.224 104.156.0.225 104.156.0.226 104.156.0.227 104.156.0.228 104.156.0.229 104.156.0.230 104.156.0.231 104.156.0.232 104.156.0.233 104.156.0.234 104.156.0.235 104.156.0.236 104.156.0.237 104.156.0.238 104.156.0.239 104.156.0.240 104.156.0.241 104.156.0.242 104.156.0.243 104.156.0.244 104.156.0.245 104.156.0.246 104.156.0.247 104.156.0.248 104.156.0.249 104.156.0.250 104.156.0.251 104.156.0.252 104.156.0.253 104.156.0.254 104.156.0.255 + 1.8K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 104.156.0.0/20.

Announced prefix
104.156.0.0/20
Origin AS
AS32391
Announcement samples
138,447
Last seen
2026-07-23 21:39:53

Frequently Asked Questions

What is 104.156.0.0/21?

104.156.0.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 104.156.0.0 to 104.156.7.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 104.156.0.0/21 network?

The 104.156.0.0/21 range is allocated to SANTA ROSA TELEPHONE COOPERATIVE INC and announced via AS32391 from United States.

Last updated: 2026-07-23 21:55:31 UTC
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