In our GeoIP2 CSV Blocks files, IPv4 and IPv6 addresses are not listed individually, but are instead consolidated into networks in CIDR format–for example, “18.104.22.168/29” for IPv4, or “2001:4b0::/80” for IPv6. IPs are consolidated to the largest size network possible where the data returned by a given database is all the same. This notation by network is essential to maintaining manageable file sizes; however, as a result, you would not be able to search directly for the vast majority of individual IPs.
If you wish to convert the CIDR format to start/end dotted-decimal IPs or to start/end integer IPs, we provide a conversion utility tool here.
Developer documentation for our GeoIP2 CSV databases is linked here.
If you would like to look up a specific IP and have available service credit, you could use our Batch Lookup Tool [login required], located under the ‘GeoIP2 / GeoLite2’ menu in the account portal. If you do not have available service credit, you may purchase credit in your account portal [login required].
Our Batch Lookup Tool allows you to upload a list of individual IPs, and it creates files in CSV and JSON format that contain the lookup results for those specific IPs.