I've been summoned by the police because of a "dot-zero" address on one of our servers. Someone had been buying stuff online with a stolen card and the shop ad

I've been summoned by the police because of a "dot-zero" address on one of our servers. Someone had been buying stuff online with a stolen card and the shop admins provided a list of the IP addresses used, including our server's. All the addresses were dot-zero addresses, so I assume it was just some kind of unfortunate obfuscation.