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CIDR Range

21.21.15.128/25

128 IPs /25 United States Department of Defense DoD AS749 United States ARIN
Addresses
128
128
IP Range
21.21.15.128
→ 21.21.15.255
Sub-ranges
0+
within this block
PTR Density
0.0%
0 of 128 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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Geolocation

All 128 IP addresses in 21.21.15.128/25

21.21.15.128 21.21.15.129 21.21.15.130 21.21.15.131 21.21.15.132 21.21.15.133 21.21.15.134 21.21.15.135 21.21.15.136 21.21.15.137 21.21.15.138 21.21.15.139 21.21.15.140 21.21.15.141 21.21.15.142 21.21.15.143 21.21.15.144 21.21.15.145 21.21.15.146 21.21.15.147 21.21.15.148 21.21.15.149 21.21.15.150 21.21.15.151 21.21.15.152 21.21.15.153 21.21.15.154 21.21.15.155 21.21.15.156 21.21.15.157 21.21.15.158 21.21.15.159 21.21.15.160 21.21.15.161 21.21.15.162 21.21.15.163 21.21.15.164 21.21.15.165 21.21.15.166 21.21.15.167 21.21.15.168 21.21.15.169 21.21.15.170 21.21.15.171 21.21.15.172 21.21.15.173 21.21.15.174 21.21.15.175 21.21.15.176 21.21.15.177 21.21.15.178 21.21.15.179 21.21.15.180 21.21.15.181 21.21.15.182 21.21.15.183 21.21.15.184 21.21.15.185 21.21.15.186 21.21.15.187 21.21.15.188 21.21.15.189 21.21.15.190 21.21.15.191 21.21.15.192 21.21.15.193 21.21.15.194 21.21.15.195 21.21.15.196 21.21.15.197 21.21.15.198 21.21.15.199 21.21.15.200 21.21.15.201 21.21.15.202 21.21.15.203 21.21.15.204 21.21.15.205 21.21.15.206 21.21.15.207 21.21.15.208 21.21.15.209 21.21.15.210 21.21.15.211 21.21.15.212 21.21.15.213 21.21.15.214 21.21.15.215 21.21.15.216 21.21.15.217 21.21.15.218 21.21.15.219 21.21.15.220 21.21.15.221 21.21.15.222 21.21.15.223 21.21.15.224 21.21.15.225 21.21.15.226 21.21.15.227 21.21.15.228 21.21.15.229 21.21.15.230 21.21.15.231 21.21.15.232 21.21.15.233 21.21.15.234 21.21.15.235 21.21.15.236 21.21.15.237 21.21.15.238 21.21.15.239 21.21.15.240 21.21.15.241 21.21.15.242 21.21.15.243 21.21.15.244 21.21.15.245 21.21.15.246 21.21.15.247 21.21.15.248 21.21.15.249 21.21.15.250 21.21.15.251 21.21.15.252 21.21.15.253 21.21.15.254 21.21.15.255

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 21.0.0.0/8.

Announced prefix
21.0.0.0/8
Origin AS
AS749
Announcement samples
10,378
Last seen
2026-07-29 10:55:00

Frequently Asked Questions

What is 21.21.15.128/25?

21.21.15.128/25 is a CIDR network block containing 128 IPv4 addresses (from 21.21.15.128 to 21.21.15.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 21.21.15.128/25 network?

The 21.21.15.128/25 range is allocated to United States Department of Defense DoD and announced via AS749 from United States.

How many IP addresses are in 21.21.15.128/25?

21.21.15.128/25 contains exactly 128 usable IPv4 addresses. A /25 prefix length means 128 addresses are covered by this single routing entry.

Last updated: 2026-07-29 10:55:31 UTC
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