If a user forms a long-term strategy, then shifting domain to a new hosting company is not a big deal to concern. A straightforward approach to the sketch given below can help user to shift any domain without downtime:
Establishment of user"s new web hosting account
Transfer the domain if required
Modification in domain"s name servers
Termination of old hosting account
The foremost step the user needs to talk about is the establishment of new web hosting account. The features like support and cost offered by the host should match with the budget contained by the host. One should trace their online signup process and establish the account and also must ensure that uploading of all files has done or not before shifting to the new site. The first step do not require more then one day for accomplishment.
Next step would be transformation of user"s domain to a new registrar. The user should consider this step if the registrar and hosting provider are the same company. This step takes one day for accomplishment while the domain registries sort themselves out.
Next or rather last step is to modify the name servers to the name servers of user"s new hosting provider. What one need to do is simply log on to his/her domain registrar"s control panel and should renew the update the name servers according to the one delivered by the new hosting company. The complete procedure of this step consumes highest amount of time. Thus if one wants to be paranoid about it, then he/she should wait for at least 48 hours before forwarding to the next step. Here as long as one waits it is considered more better, but 72 hour are considered appropriate.
At last, one should terminate the web hosting account with the previous company which was providing the services before.