You can still download the content from the DLS White Pages if you use an FTP client such as Filezilla. You will need to login via the client to the DLS FTP server and there you'll see the content you want to download.
You can also do this if you are using Edge as your browser, do the following:
Click on settings which is found under the three dots in the upper right corner.
Click on Default Browser.
Switch to Internet Explorer.
You can add in specific sites to use IE such as the DLS White Pages, but keep in mind that the link will expire in 30-days.