You should have no problems if you change your provider (registrar), but want to keep your registered domain. You simply need the authorization code for your domain, which you can request from your original provider. If, for example, you plan to transfer from one provider to 1&1 IONOS, you will need to fill out a special domain-transfer form to confirm the transfer. All further steps will then be carried out. As mentioned previously, the provider’s task is to then contact the appropriate domain registry.
Keep in mind that you can change your provider only after minimum 6 months fter your domain was registered.
How long the domain move takes depends on the particular domain registrar’s rules of procedure. Five to six working days is to be expected with generic TLDs and nTLDs and the subsequent DNS update requires a further 24 to 48 hours.
It is advisable to apply for the domain transfer at least one month before the contract with the old provider expires. If the request arrives too late, you could find that the service period of the respective domain has to be renewed by the current provider before a transfer over to the new provider can take place.