FBI wants detailed records
While copyright infringement would be a likely area of investigation for the FBI with Archive.today, the subpoena doesn’t provide specific information on the probe. The subpoena seeks the Archive.today customer or subscriber name, addresses, length of service, records of phone calls or texts, payment information, records of session times and duration of Internet connectivity, mobile device identification codes, IP addresses or other numbers used to identify the subscriber, and the types of services provided.
In contrast with the nonprofit Internet Archive, the operator or operators of Archive.today have remained mysterious. It has used various domains (archive.ph, archive.is, etc.), and its registrant “Denis Petrov” may be an alias.
An FAQ that apparently hasn’t been updated in over a decade says that Archive.today,