1.3.21.0/24 IP range list | IP Netblocks API | WhoisXML API
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WHOIS / WHOIS History

Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers.

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DNS / DNS History

Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records.

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IP Geolocation / IP Netblocks

Get detailed context on an IP address, including its user’s geolocation, time zone, connected domains, connection type, IP range, ASN, and other network ownership details.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Access our web-based solution to dig into and monitor all domain events of interest.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Get access to a web-based enterprise-grade solution to search and monitor domain registrations and ownership details for branded terms, fuzzy matches, registrants of interest, and more.

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Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.

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1.3.21.0/24 IP range

For commercial use of this information, please contact us or learn more about our IP intelligence from our product sheet.

Browse through all of the IP addresses within 1.3.21.0/24, which is an IP range contained within 1.3.0.0/16, or alternatively browse all IP addresses.

1.3.21.0 1.3.21.1 1.3.21.2 1.3.21.3 1.3.21.4
1.3.21.5 1.3.21.6 1.3.21.7 1.3.21.8 1.3.21.9
1.3.21.10 1.3.21.11 1.3.21.12 1.3.21.13 1.3.21.14
1.3.21.15 1.3.21.16 1.3.21.17 1.3.21.18 1.3.21.19
1.3.21.20 1.3.21.21 1.3.21.22 1.3.21.23 1.3.21.24
1.3.21.25 1.3.21.26 1.3.21.27 1.3.21.28 1.3.21.29
1.3.21.30 1.3.21.31 1.3.21.32 1.3.21.33 1.3.21.34
1.3.21.35 1.3.21.36 1.3.21.37 1.3.21.38 1.3.21.39
1.3.21.40 1.3.21.41 1.3.21.42 1.3.21.43 1.3.21.44
1.3.21.45 1.3.21.46 1.3.21.47 1.3.21.48 1.3.21.49
1.3.21.50 1.3.21.51 1.3.21.52 1.3.21.53 1.3.21.54
1.3.21.55 1.3.21.56 1.3.21.57 1.3.21.58 1.3.21.59
1.3.21.60 1.3.21.61 1.3.21.62 1.3.21.63 1.3.21.64
1.3.21.65 1.3.21.66 1.3.21.67 1.3.21.68 1.3.21.69
1.3.21.70 1.3.21.71 1.3.21.72 1.3.21.73 1.3.21.74
1.3.21.75 1.3.21.76 1.3.21.77 1.3.21.78 1.3.21.79
1.3.21.80 1.3.21.81 1.3.21.82 1.3.21.83 1.3.21.84
1.3.21.85 1.3.21.86 1.3.21.87 1.3.21.88 1.3.21.89
1.3.21.90 1.3.21.91 1.3.21.92 1.3.21.93 1.3.21.94
1.3.21.95 1.3.21.96 1.3.21.97 1.3.21.98 1.3.21.99
1.3.21.100 1.3.21.101 1.3.21.102 1.3.21.103 1.3.21.104
1.3.21.105 1.3.21.106 1.3.21.107 1.3.21.108 1.3.21.109
1.3.21.110 1.3.21.111 1.3.21.112 1.3.21.113 1.3.21.114
1.3.21.115 1.3.21.116 1.3.21.117 1.3.21.118 1.3.21.119
1.3.21.120 1.3.21.121 1.3.21.122 1.3.21.123 1.3.21.124
1.3.21.125 1.3.21.126 1.3.21.127 1.3.21.128 1.3.21.129
1.3.21.130 1.3.21.131 1.3.21.132 1.3.21.133 1.3.21.134
1.3.21.135 1.3.21.136 1.3.21.137 1.3.21.138 1.3.21.139
1.3.21.140 1.3.21.141 1.3.21.142 1.3.21.143 1.3.21.144
1.3.21.145 1.3.21.146 1.3.21.147 1.3.21.148 1.3.21.149
1.3.21.150 1.3.21.151 1.3.21.152 1.3.21.153 1.3.21.154
1.3.21.155 1.3.21.156 1.3.21.157 1.3.21.158 1.3.21.159
1.3.21.160 1.3.21.161 1.3.21.162 1.3.21.163 1.3.21.164
1.3.21.165 1.3.21.166 1.3.21.167 1.3.21.168 1.3.21.169
1.3.21.170 1.3.21.171 1.3.21.172 1.3.21.173 1.3.21.174
1.3.21.175 1.3.21.176 1.3.21.177 1.3.21.178 1.3.21.179
1.3.21.180 1.3.21.181 1.3.21.182 1.3.21.183 1.3.21.184
1.3.21.185 1.3.21.186 1.3.21.187 1.3.21.188 1.3.21.189
1.3.21.190 1.3.21.191 1.3.21.192 1.3.21.193 1.3.21.194
1.3.21.195 1.3.21.196 1.3.21.197 1.3.21.198 1.3.21.199
1.3.21.200 1.3.21.201 1.3.21.202 1.3.21.203 1.3.21.204
1.3.21.205 1.3.21.206 1.3.21.207 1.3.21.208 1.3.21.209
1.3.21.210 1.3.21.211 1.3.21.212 1.3.21.213 1.3.21.214
1.3.21.215 1.3.21.216 1.3.21.217 1.3.21.218 1.3.21.219
1.3.21.220 1.3.21.221 1.3.21.222 1.3.21.223 1.3.21.224
1.3.21.225 1.3.21.226 1.3.21.227 1.3.21.228 1.3.21.229
1.3.21.230 1.3.21.231 1.3.21.232 1.3.21.233 1.3.21.234
1.3.21.235 1.3.21.236 1.3.21.237 1.3.21.238 1.3.21.239
1.3.21.240 1.3.21.241 1.3.21.242 1.3.21.243 1.3.21.244
1.3.21.245 1.3.21.246 1.3.21.247 1.3.21.248 1.3.21.249
1.3.21.250 1.3.21.251 1.3.21.252 1.3.21.253 1.3.21.254