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CIDR Range

16.217.216.0/21

2.0K IPs /21 United States ARIN
Addresses
2,048
2.0K
IP Range
16.217.216.0
→ 16.217.223.255
Sub-ranges
21+
within this block
PTR Density
12.5%
256 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.

76/100
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 16.217.216.0/21

CIDRIPsOrganizationASNCountry
16.217.220.0/22 1.0K — — SG
16.217.220.0/22 1.0K — — US
16.217.220.0/22 1.0K — — US
16.217.218.0/23 512 — — US
16.217.218.0/23 512 — — US
16.217.221.0/24 256 Synergy Cross Corporation AS151389 US
16.217.222.0/24 256 FST Networks LTD. AS402276 US
16.217.220.0/24 256 Zyberz LLC AS400308 US
16.217.219.0/24 256 Cyberfly AS402343 US
16.217.219.0/24 256 Cyberfly AS402343 HK
16.217.216.0/24 256 Cyberfly AS402343 HK
16.217.218.0/24 256 SpectraIP B.V. AS62068 US
16.217.216.0/24 256 Cyberfly AS402343 US
16.217.216.0/24 256 — — US
16.217.216.0/24 256 — — US
16.217.217.0/24 256 Frontier Communications of America, Inc. AS5650 US
16.217.217.0/24 256 Frontier Communications of America, Inc. AS5650 US
16.217.217.0/24 256 — — US
16.217.217.0/24 256 — — JP
16.217.218.0/24 256 — — US
16.217.223.0/24 256 FSTcloud AS402315 US

Geolocation

First 256 of 2,048 IP addresses in 16.217.216.0/21

16.217.216.0 16.217.216.1 16.217.216.2 16.217.216.3 16.217.216.4 16.217.216.5 16.217.216.6 16.217.216.7 16.217.216.8 16.217.216.9 16.217.216.10 16.217.216.11 16.217.216.12 16.217.216.13 16.217.216.14 16.217.216.15 16.217.216.16 16.217.216.17 16.217.216.18 16.217.216.19 16.217.216.20 16.217.216.21 16.217.216.22 16.217.216.23 16.217.216.24 16.217.216.25 16.217.216.26 16.217.216.27 16.217.216.28 16.217.216.29 16.217.216.30 16.217.216.31 16.217.216.32 16.217.216.33 16.217.216.34 16.217.216.35 16.217.216.36 16.217.216.37 16.217.216.38 16.217.216.39 16.217.216.40 16.217.216.41 16.217.216.42 16.217.216.43 16.217.216.44 16.217.216.45 16.217.216.46 16.217.216.47 16.217.216.48 16.217.216.49 16.217.216.50 16.217.216.51 16.217.216.52 16.217.216.53 16.217.216.54 16.217.216.55 16.217.216.56 16.217.216.57 16.217.216.58 16.217.216.59 16.217.216.60 16.217.216.61 16.217.216.62 16.217.216.63 16.217.216.64 16.217.216.65 16.217.216.66 16.217.216.67 16.217.216.68 16.217.216.69 16.217.216.70 16.217.216.71 16.217.216.72 16.217.216.73 16.217.216.74 16.217.216.75 16.217.216.76 16.217.216.77 16.217.216.78 16.217.216.79 16.217.216.80 16.217.216.81 16.217.216.82 16.217.216.83 16.217.216.84 16.217.216.85 16.217.216.86 16.217.216.87 16.217.216.88 16.217.216.89 16.217.216.90 16.217.216.91 16.217.216.92 16.217.216.93 16.217.216.94 16.217.216.95 16.217.216.96 16.217.216.97 16.217.216.98 16.217.216.99 16.217.216.100 16.217.216.101 16.217.216.102 16.217.216.103 16.217.216.104 16.217.216.105 16.217.216.106 16.217.216.107 16.217.216.108 16.217.216.109 16.217.216.110 16.217.216.111 16.217.216.112 16.217.216.113 16.217.216.114 16.217.216.115 16.217.216.116 16.217.216.117 16.217.216.118 16.217.216.119 16.217.216.120 16.217.216.121 16.217.216.122 16.217.216.123 16.217.216.124 16.217.216.125 16.217.216.126 16.217.216.127 16.217.216.128 16.217.216.129 16.217.216.130 16.217.216.131 16.217.216.132 16.217.216.133 16.217.216.134 16.217.216.135 16.217.216.136 16.217.216.137 16.217.216.138 16.217.216.139 16.217.216.140 16.217.216.141 16.217.216.142 16.217.216.143 16.217.216.144 16.217.216.145 16.217.216.146 16.217.216.147 16.217.216.148 16.217.216.149 16.217.216.150 16.217.216.151 16.217.216.152 16.217.216.153 16.217.216.154 16.217.216.155 16.217.216.156 16.217.216.157 16.217.216.158 16.217.216.159 16.217.216.160 16.217.216.161 16.217.216.162 16.217.216.163 16.217.216.164 16.217.216.165 16.217.216.166 16.217.216.167 16.217.216.168 16.217.216.169 16.217.216.170 16.217.216.171 16.217.216.172 16.217.216.173 16.217.216.174 16.217.216.175 16.217.216.176 16.217.216.177 16.217.216.178 16.217.216.179 16.217.216.180 16.217.216.181 16.217.216.182 16.217.216.183 16.217.216.184 16.217.216.185 16.217.216.186 16.217.216.187 16.217.216.188 16.217.216.189 16.217.216.190 16.217.216.191 16.217.216.192 16.217.216.193 16.217.216.194 16.217.216.195 16.217.216.196 16.217.216.197 16.217.216.198 16.217.216.199 16.217.216.200 16.217.216.201 16.217.216.202 16.217.216.203 16.217.216.204 16.217.216.205 16.217.216.206 16.217.216.207 16.217.216.208 16.217.216.209 16.217.216.210 16.217.216.211 16.217.216.212 16.217.216.213 16.217.216.214 16.217.216.215 16.217.216.216 16.217.216.217 16.217.216.218 16.217.216.219 16.217.216.220 16.217.216.221 16.217.216.222 16.217.216.223 16.217.216.224 16.217.216.225 16.217.216.226 16.217.216.227 16.217.216.228 16.217.216.229 16.217.216.230 16.217.216.231 16.217.216.232 16.217.216.233 16.217.216.234 16.217.216.235 16.217.216.236 16.217.216.237 16.217.216.238 16.217.216.239 16.217.216.240 16.217.216.241 16.217.216.242 16.217.216.243 16.217.216.244 16.217.216.245 16.217.216.246 16.217.216.247 16.217.216.248 16.217.216.249 16.217.216.250 16.217.216.251 16.217.216.252 16.217.216.253 16.217.216.254 16.217.216.255 + 1.8K more (range too large to list inline)

RIR Ownership History

Atom feed ⇲

Allocation changes captured weekly from regional internet registry (RIR) delegation files.

Date Event From To
2026-05-10 New Allocation — US

Frequently Asked Questions

What is 16.217.216.0/21?

16.217.216.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 16.217.216.0 to 16.217.223.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 16.217.216.0/21 network?

The 16.217.216.0/21 range is allocated to an unknown organization from United States.

Last updated: 2026-07-23 03:25:32 UTC
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