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CIDR Range

205.123.0.0/16

65.5K IPs /16 Utah Education Network AS210 United States ARIN
Addresses
65,536
65.5K
IP Range
205.123.0.0
→ 205.123.255.255
Sub-ranges
13+
within this block
PTR Density
0.7%
479 of 65.5K 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.

82/100
Trusted
How this score is built

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

Ranges inside 205.123.0.0/16

CIDRIPsOrganizationASNCountry
205.123.128.0/18 16.4K Utah Education Network AS210 US
205.123.64.0/18 16.4K Utah Education Network AS210 US
205.123.224.0/19 8.2K Utah Education Network AS210 US
205.123.208.0/20 4.1K Utah Education Network AS210 US
205.123.192.0/20 4.1K Utah Education Network AS210 US
205.123.112.0/20 4.1K Utah Education Network AS210 US
205.123.96.0/20 4.1K Utah Education Network AS210 US
205.123.80.0/20 4.1K Utah Education Network AS210 US
205.123.64.0/20 4.1K Utah Education Network AS210 US
205.123.48.0/20 4.1K Utah Education Network AS210 US
205.123.32.0/20 4.1K Utah Education Network AS210 US
205.123.16.0/20 4.1K Utah Education Network AS210 US
205.123.0.0/20 4.1K Utah Education Network AS210 US

Geolocation

First 256 of 65,536 IP addresses in 205.123.0.0/16

205.123.0.0 205.123.0.1 205.123.0.2 205.123.0.3 205.123.0.4 205.123.0.5 205.123.0.6 205.123.0.7 205.123.0.8 205.123.0.9 205.123.0.10 205.123.0.11 205.123.0.12 205.123.0.13 205.123.0.14 205.123.0.15 205.123.0.16 205.123.0.17 205.123.0.18 205.123.0.19 205.123.0.20 205.123.0.21 205.123.0.22 205.123.0.23 205.123.0.24 205.123.0.25 205.123.0.26 205.123.0.27 205.123.0.28 205.123.0.29 205.123.0.30 205.123.0.31 205.123.0.32 205.123.0.33 205.123.0.34 205.123.0.35 205.123.0.36 205.123.0.37 205.123.0.38 205.123.0.39 205.123.0.40 205.123.0.41 205.123.0.42 205.123.0.43 205.123.0.44 205.123.0.45 205.123.0.46 205.123.0.47 205.123.0.48 205.123.0.49 205.123.0.50 205.123.0.51 205.123.0.52 205.123.0.53 205.123.0.54 205.123.0.55 205.123.0.56 205.123.0.57 205.123.0.58 205.123.0.59 205.123.0.60 205.123.0.61 205.123.0.62 205.123.0.63 205.123.0.64 205.123.0.65 205.123.0.66 205.123.0.67 205.123.0.68 205.123.0.69 205.123.0.70 205.123.0.71 205.123.0.72 205.123.0.73 205.123.0.74 205.123.0.75 205.123.0.76 205.123.0.77 205.123.0.78 205.123.0.79 205.123.0.80 205.123.0.81 205.123.0.82 205.123.0.83 205.123.0.84 205.123.0.85 205.123.0.86 205.123.0.87 205.123.0.88 205.123.0.89 205.123.0.90 205.123.0.91 205.123.0.92 205.123.0.93 205.123.0.94 205.123.0.95 205.123.0.96 205.123.0.97 205.123.0.98 205.123.0.99 205.123.0.100 205.123.0.101 205.123.0.102 205.123.0.103 205.123.0.104 205.123.0.105 205.123.0.106 205.123.0.107 205.123.0.108 205.123.0.109 205.123.0.110 205.123.0.111 205.123.0.112 205.123.0.113 205.123.0.114 205.123.0.115 205.123.0.116 205.123.0.117 205.123.0.118 205.123.0.119 205.123.0.120 205.123.0.121 205.123.0.122 205.123.0.123 205.123.0.124 205.123.0.125 205.123.0.126 205.123.0.127 205.123.0.128 205.123.0.129 205.123.0.130 205.123.0.131 205.123.0.132 205.123.0.133 205.123.0.134 205.123.0.135 205.123.0.136 205.123.0.137 205.123.0.138 205.123.0.139 205.123.0.140 205.123.0.141 205.123.0.142 205.123.0.143 205.123.0.144 205.123.0.145 205.123.0.146 205.123.0.147 205.123.0.148 205.123.0.149 205.123.0.150 205.123.0.151 205.123.0.152 205.123.0.153 205.123.0.154 205.123.0.155 205.123.0.156 205.123.0.157 205.123.0.158 205.123.0.159 205.123.0.160 205.123.0.161 205.123.0.162 205.123.0.163 205.123.0.164 205.123.0.165 205.123.0.166 205.123.0.167 205.123.0.168 205.123.0.169 205.123.0.170 205.123.0.171 205.123.0.172 205.123.0.173 205.123.0.174 205.123.0.175 205.123.0.176 205.123.0.177 205.123.0.178 205.123.0.179 205.123.0.180 205.123.0.181 205.123.0.182 205.123.0.183 205.123.0.184 205.123.0.185 205.123.0.186 205.123.0.187 205.123.0.188 205.123.0.189 205.123.0.190 205.123.0.191 205.123.0.192 205.123.0.193 205.123.0.194 205.123.0.195 205.123.0.196 205.123.0.197 205.123.0.198 205.123.0.199 205.123.0.200 205.123.0.201 205.123.0.202 205.123.0.203 205.123.0.204 205.123.0.205 205.123.0.206 205.123.0.207 205.123.0.208 205.123.0.209 205.123.0.210 205.123.0.211 205.123.0.212 205.123.0.213 205.123.0.214 205.123.0.215 205.123.0.216 205.123.0.217 205.123.0.218 205.123.0.219 205.123.0.220 205.123.0.221 205.123.0.222 205.123.0.223 205.123.0.224 205.123.0.225 205.123.0.226 205.123.0.227 205.123.0.228 205.123.0.229 205.123.0.230 205.123.0.231 205.123.0.232 205.123.0.233 205.123.0.234 205.123.0.235 205.123.0.236 205.123.0.237 205.123.0.238 205.123.0.239 205.123.0.240 205.123.0.241 205.123.0.242 205.123.0.243 205.123.0.244 205.123.0.245 205.123.0.246 205.123.0.247 205.123.0.248 205.123.0.249 205.123.0.250 205.123.0.251 205.123.0.252 205.123.0.253 205.123.0.254 205.123.0.255 + 65.3K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 205.120.0.0/13.

Announced prefix
205.120.0.0/13
Origin AS
AS210
Announcement samples
5,527
Last seen
2026-07-24 01:01:48

Frequently Asked Questions

What is 205.123.0.0/16?

205.123.0.0/16 is a CIDR network block containing 65,536 IPv4 addresses (from 205.123.0.0 to 205.123.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 205.123.0.0/16 network?

The 205.123.0.0/16 range is allocated to Utah Education Network and announced via AS210 from United States.

Last updated: 2026-07-24 01:40:32 UTC
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