What is domain propagation?
When a visitor types
your domain name into their Web browser, their
request is referred to a nameserver that indicates
the physical location (the IP address) of your
domain on the Internet. When your site location
changes to a new IP address, or when a new domain
name is added, nameservers around the world must
be notified of the change. This process is
referred to as propagation.
Propagation normally requires 24-48 hours. During
this period, if you are transferring your domain,
some nameservers will refer to the old location of
your site and some to the new location. Therefore,
a visitor accessing your site may be directed to
either the old or new location. It is usually best
to keep your previous hosting company until your
transfer is verified as having taken place.