An online service gathers information about a user's access to an online account and makes that information available to the account owner and/or other authorized user. When an online account is accessed, the online service logs a time stamp, a network address from which the account was accessed, a port number, a user ID, routing data, and/or other access data. The online service may use the access information to obtain address ownership name, geographic location, and/or other ownership information associated with the account access. The accessing client also stores access data. The client, account owner, and/or another decision maker evaluates all, or portions of information to detect unauthorized access to the account. The decision maker may dynamically evaluate and display the access data or later compare log files of the online service and the account owner's local log file.