A subscription website has my IP address. They claim to be able to identify me by name, address, etc. Is that possible? David Griffith
The IP (Internet Protocol) address only identifies your PC to your internet service provider. Various "geolocation" techniques can be used to narrow that down, but not reliably, and not to your name and address.
The only way to get those would be to ask your ISP, which will have the information in its log files. I would expect an ISP to supply these details if officially approached by the police or given a court order, but it would have to be a fairly serious matter.