Unfortunately we are not offering any server transfers for World of Warplanes at this time.
Please note that unification is also not available across multiple servers. This means you cannot earn premium time in the World of Warplanes NA beta and use it on an World of Tanks EU account, even if they share an email address. All information on accounts is localized per server.
Thanks for your understanding! Please contact us if you have further issues related to server transfers.