[synt4xx]

If you were running something like Wireshark while the DDoS attack was going on, you would be able to save a capture of every packet going in and out. This is an easy way to identify all of your attackers bots.

[нєχ]

You can check your router logs. ( All depending on your Router )
Or you can get/buy a VPN, PM me for services.

[ItsFluffy]

router logs are your best bet but usually used more for reporting, like if i report someone's isp directly i gather my logs and submit

RoadRunner requests your router logs to verify that someone in their system is actually doing what you say but if you can prove it they're internet can get suspended lol