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CIDR Range

4.205.0.0/16

65.5K IPs /16 Microsoft Corporation AS8075 Canada ARIN
Addresses
65,536
65.5K
IP Range
4.205.0.0
→ 4.205.255.255
Sub-ranges
6+
within this block
PTR Density
0.4%
288 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.

70/100
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 4.205.0.0/16

CIDRIPsOrganizationASNCountry
4.205.128.0/17 32.8K Microsoft Corporation AS8075 US
4.205.0.0/18 16.4K Microsoft Corporation AS8075 US
4.205.64.0/18 16.4K Microsoft Corporation AS8075 US
4.205.96.0/19 8.2K Microsoft Corporation AS8075 US
4.205.64.0/20 4.1K Microsoft Corporation AS8075 US
4.205.80.0/20 4.1K Microsoft Corporation AS8075 US

Geolocation

First 256 of 65,536 IP addresses in 4.205.0.0/16

4.205.0.0 4.205.0.1 4.205.0.2 4.205.0.3 4.205.0.4 4.205.0.5 4.205.0.6 4.205.0.7 4.205.0.8 4.205.0.9 4.205.0.10 4.205.0.11 4.205.0.12 4.205.0.13 4.205.0.14 4.205.0.15 4.205.0.16 4.205.0.17 4.205.0.18 4.205.0.19 4.205.0.20 4.205.0.21 4.205.0.22 4.205.0.23 4.205.0.24 4.205.0.25 4.205.0.26 4.205.0.27 4.205.0.28 4.205.0.29 4.205.0.30 4.205.0.31 4.205.0.32 4.205.0.33 4.205.0.34 4.205.0.35 4.205.0.36 4.205.0.37 4.205.0.38 4.205.0.39 4.205.0.40 4.205.0.41 4.205.0.42 4.205.0.43 4.205.0.44 4.205.0.45 4.205.0.46 4.205.0.47 4.205.0.48 4.205.0.49 4.205.0.50 4.205.0.51 4.205.0.52 4.205.0.53 4.205.0.54 4.205.0.55 4.205.0.56 4.205.0.57 4.205.0.58 4.205.0.59 4.205.0.60 4.205.0.61 4.205.0.62 4.205.0.63 4.205.0.64 4.205.0.65 4.205.0.66 4.205.0.67 4.205.0.68 4.205.0.69 4.205.0.70 4.205.0.71 4.205.0.72 4.205.0.73 4.205.0.74 4.205.0.75 4.205.0.76 4.205.0.77 4.205.0.78 4.205.0.79 4.205.0.80 4.205.0.81 4.205.0.82 4.205.0.83 4.205.0.84 4.205.0.85 4.205.0.86 4.205.0.87 4.205.0.88 4.205.0.89 4.205.0.90 4.205.0.91 4.205.0.92 4.205.0.93 4.205.0.94 4.205.0.95 4.205.0.96 4.205.0.97 4.205.0.98 4.205.0.99 4.205.0.100 4.205.0.101 4.205.0.102 4.205.0.103 4.205.0.104 4.205.0.105 4.205.0.106 4.205.0.107 4.205.0.108 4.205.0.109 4.205.0.110 4.205.0.111 4.205.0.112 4.205.0.113 4.205.0.114 4.205.0.115 4.205.0.116 4.205.0.117 4.205.0.118 4.205.0.119 4.205.0.120 4.205.0.121 4.205.0.122 4.205.0.123 4.205.0.124 4.205.0.125 4.205.0.126 4.205.0.127 4.205.0.128 4.205.0.129 4.205.0.130 4.205.0.131 4.205.0.132 4.205.0.133 4.205.0.134 4.205.0.135 4.205.0.136 4.205.0.137 4.205.0.138 4.205.0.139 4.205.0.140 4.205.0.141 4.205.0.142 4.205.0.143 4.205.0.144 4.205.0.145 4.205.0.146 4.205.0.147 4.205.0.148 4.205.0.149 4.205.0.150 4.205.0.151 4.205.0.152 4.205.0.153 4.205.0.154 4.205.0.155 4.205.0.156 4.205.0.157 4.205.0.158 4.205.0.159 4.205.0.160 4.205.0.161 4.205.0.162 4.205.0.163 4.205.0.164 4.205.0.165 4.205.0.166 4.205.0.167 4.205.0.168 4.205.0.169 4.205.0.170 4.205.0.171 4.205.0.172 4.205.0.173 4.205.0.174 4.205.0.175 4.205.0.176 4.205.0.177 4.205.0.178 4.205.0.179 4.205.0.180 4.205.0.181 4.205.0.182 4.205.0.183 4.205.0.184 4.205.0.185 4.205.0.186 4.205.0.187 4.205.0.188 4.205.0.189 4.205.0.190 4.205.0.191 4.205.0.192 4.205.0.193 4.205.0.194 4.205.0.195 4.205.0.196 4.205.0.197 4.205.0.198 4.205.0.199 4.205.0.200 4.205.0.201 4.205.0.202 4.205.0.203 4.205.0.204 4.205.0.205 4.205.0.206 4.205.0.207 4.205.0.208 4.205.0.209 4.205.0.210 4.205.0.211 4.205.0.212 4.205.0.213 4.205.0.214 4.205.0.215 4.205.0.216 4.205.0.217 4.205.0.218 4.205.0.219 4.205.0.220 4.205.0.221 4.205.0.222 4.205.0.223 4.205.0.224 4.205.0.225 4.205.0.226 4.205.0.227 4.205.0.228 4.205.0.229 4.205.0.230 4.205.0.231 4.205.0.232 4.205.0.233 4.205.0.234 4.205.0.235 4.205.0.236 4.205.0.237 4.205.0.238 4.205.0.239 4.205.0.240 4.205.0.241 4.205.0.242 4.205.0.243 4.205.0.244 4.205.0.245 4.205.0.246 4.205.0.247 4.205.0.248 4.205.0.249 4.205.0.250 4.205.0.251 4.205.0.252 4.205.0.253 4.205.0.254 4.205.0.255 + 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 4.192.0.0/12.

Announced prefix
4.192.0.0/12
Origin AS
AS8075
Announcement samples
2,684
Last seen
2026-07-19 17:34:01

Frequently Asked Questions

What is 4.205.0.0/16?

4.205.0.0/16 is a CIDR network block containing 65,536 IPv4 addresses (from 4.205.0.0 to 4.205.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 4.205.0.0/16 network?

The 4.205.0.0/16 range is allocated to Microsoft Corporation and announced via AS8075 from Canada.

Last updated: 2026-07-19 17:40:31 UTC
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