Transfering a Domain from yahoo to aecnu hosting

When transferring a domain from one register to another, how long would the website be down.

We have the Domain registered with yahoo, but the domain is pointed to aecnu hosting servers and the website is complete.

Now that it is time to renew the domain we want to transfer/register it to aecnu hosting.

How long will our wordpress site be down during the transfer?

TY :slight_smile: