When you create a new hostname site collection, the default alternate access mappings will still exist but cannot be used. Use Windows PowerShell commands to manage URL mappings for host-named site collections.
Add a mapping to an existing site:
Set-SPSiteUrl (Get-SPSite ‚http://teams.contoso.com‘) -Url ‚http://teamsites.contoso.com‘ -Zone Intranet
Each URL mapping is applied to a single zone. Use one of the following zone names when you map URLs:
Default
Intranet
Internet
Custom
Extranet
If you do not specify the -Zone parameter and the URL mapping entry is new, the default zone is used.
Remove a mapping for a site:
Remove-SPSiteUrl ‚http://teamsites.contoso.com‘
Display all URL mappings for a site:
Get-SPSiteUrl -Identity (Get-SPSite ‚http://teams.contoso.com‘)