How long does it take for new domain to propagate?

Hi,

Name servers appear in three places, and typically they should all be in synch:
~ The name servers that Route 53 assigns to a hosted zone when you create it. These are the "master" name servers and cannot be changed. Name servers in the other locations usually match these.
~ The name servers in the NS record in the hosted zone.
~ The name servers that are associated with the domain registration. These are the name servers that control which DNS configuration is in use.

For ab-env.co.uk, the name servers in the NS record match the "master" name servers, but they don't match the name servers for the domain registration. This typically means that someone did the following:
~ Deleted the hosted zone that Route 53 created during domain registration.
~ Created a new hosted zone. When you create a new hosted zone, Route 53 assigns a new set of four name servers to the hosted zone, so the name servers in the new hosted zone and the name servers in the domain registration no longer match.

Here is how to fix that:

1. Get the name servers that Route 53 assigned to the hosted zone when you created it. See "Getting the Name Servers for a Public Hosted Zone" in the Route 53 Developer Guide:

https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/GetInfoAboutHostedZone.html

2. Update the domain registration to use the four name servers that you got in step 1. See "Adding or Changing Name Servers and Glue Records for a Domain":

https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/domain-name-servers-glue-records.html

After you finish, it will take a couple of days for you to be able to see your website again because DNS resolvers typically cache the names of name servers for two days. (Folks who use different DNS resolvers will be able to see your website as soon as you make the change. You might also be able to see your website from your phone.) For an overview of how DNS works, including the part about resolver caching, see "How Amazon Route 53 routes traffic for your domain":

https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/welcome-dns-service.html#welcome-dns-service-how-route-53-routes-traffic

Scott