who is currently responsible for registering domain names and ip addresses
Domain registration Domain registration information is maintained by the domain name registries, which contract with domain registrars to provide registration services to the public. An end user selects a registrar to provide the registration service, and that registrar becomes the designated registrar for the domain chosen by the user.
Ä Ä (lower case ä) is a character that represents either a letter from several extended Latin alphabets, or the letter A with an umlaut mark or diaeresis.
My Ántonia
Limit of a function (the Dirichlet function) has no limit at any x-coordinate.