Updates don’t show only with certain computers

I migrated a site from GoDaddy to 1&1 Hosting using the WP All-In-One Migration Tool. Prior to migration, the site and all updates were visible on all computers. After migration (hosting on 1&1, using GoDaddy name servers and pointing A-record to 1&1), the site is visible but its cached on my entire work network of computers. All updates are not visible on our entire network. Everywhere else I’ve checked, the site works properly.

I tried clearing the cache and cookies as well as force reloads but it still shows the cached site. All other websites also work on the network computers – our website is the only one that shows a cached version on our computers.

The site is https://www.clackamasfire.com

Any ideas on how to fix that?