What does it mean when the isp deletes assignment logs after a certain period of time?

[Datacurios]

Do they only delete assignment logs of previous unique ips assigned to you? Lets say you have dynamic ip but its been the same for years, and the isp says they delete dynamic ip logs after 12 months. Does this mean the isp deletes the logs that are older than 1 year even if its the same ip? Or do they retain that information for as long as you retain the ip?

If its a dynamic ip, the isp assigns a new ip every time the lease is out, so if it renews, does this count as a new log? And will that specific assignment be kept for 12 months? Or will the timer only begin once a different ip is assigned? Or in other words, is what gets deleted the information about what ips other than your current one have previously been assigned to you? So could the isp see that ive had the same ip for several years even if they delete logs after 12 months?

[mae-3]

@Datacurios 

Metadata is kept for 12 months which includes all IPs and sites that have been assigned and traffic to any IP and site you have connected to in the last twelve months per the law which is only accessible by law enforcement for valid reasons, and of course marketing! 😎

[Datacurios]

Lets say the ip i currently have was first assigned to me two years ago. And from then untill now i have never had any other ip address because the same one has been renewed each time. Will the ISP keep the logs of the inital first assignment or will they only keep the metadata that it was renewed 12 months ago?

[Datacurios]

Clarification - Can the isp ever identify who had a specific ip address on a date which was longer than 12 months ago?

[mae-3]

@Datacurios 

Just the metadata for twelve months only unless law enforcement is involved in an investigation for those connection details in the period of twelve months. All of the information is in the communication and investigation powers act.

[Datacurios]

So if any party wished to identify the owner of an ip address 2 years ago. That information would not exist on the ISPs server? Even if the person who had the ip address then is the same person who has it now?

[mae-3]

@Datacurios 

Sites also keep logs but it takes space to store logs and ISP are only permitted to keep them for twelve months unless an open investigation is in force for a crime then the rules are different and it is only very serious crimes like terrorism and national security reasons that are allowed to keep logs indefinite for investigation once powers have been lodged against an individual.

[Datacurios]

Alright. Thanks for the help! I just have one point of clarification and then ill leave you be. So the answer is no? The ISP can never know who owned any ip longer than 12 months ago unless law enforcement made them keep the information during the 12 months period?

[mae-3 · Accepted solution]

@Datacurios 

That is basically correct.

[Datacurios]

Thank you for your help!