I need to locate an IP. I know there are a lot of sites that do this, but I need to calculate IP addresses and preferably offline. Is there any base or algorithm for this?

I don't understand what you are trying to do, but have you tried searching for it somewhere outside breached.

what do u mean by "locate an ip" offline, what?

I don't know what you mean by "locate" ip addres. Ip adresses for private individuals are provided by the ISP to be used as a identifier. IP's are not GPS coordinates and you cannot calculate it offline, it is randomly given by ISP and most are not static

I have a database containing many IP addresses. How can everyone know the location? There are sites that can do this, but they have captcha, and therefore many addresses cannot be checked.

(October 25, 2022, 07:44 PM)Magroll Wrote: I need to locate an IP. I know there are a lot of sites that do this, but I need to calculate IP addresses and preferably offline. Is there any base or algorithm for this?

Locate it to what level of granularity? Just country?

Yeah there are some databases. If you can't find some library to do it for you then you can find a DB and write some code to query.
Linky: https://whatismyipaddress.com/geolocation-providers

Here is a site, for example. I need to implement the same functionality on my computer.
https://www.iplocation.net/

(October 25, 2022, 07:49 PM)Magroll Wrote: I have a database containing many IP addresses. How can everyone know the location? There are sites that can do this, but they have captcha, and therefore many addresses cannot be checked.

extract IP'S, and find a site that has API for checking it in bulk,  only thing you can get from an IP is a country, there is this site https://www.infobyip.com/ipbulklookup.php that will display which country the ip is originating from in bulk

Thanks, I'll try. but is there any way to do it on my computer? Not tied to third party services. And another question - if I have rather old databases (2015 - 2018), will the data still be relevant? And if not, is it possible to find data for those years.