I just did an overhaul of my company's website and changed the hosting provider, and it's probably been about 36-48 hours since I changed the pointers at my registrar to the new name servers. I have noticed some very strange behavior at my office, where we have a Windows Server domain-based LAN-- in particular, with two computers sitting next to one another, one pulls up the new site and the other does not--after repeatedly clearing the cache, resetting/flushing via ipconfig, trying different browsers, etc.--which is baffling to me. I was testing the site on someone's phone, and pulling up the site via the in-house wi-fi connection brought up the old version, while switching to his phone's LTE data connection pulled up the new one.
What exactly is going on here? Clearly those computers pulling up the old version of the site are referencing the old DNS pointers that link to the old hosting provider, but how could this vary from machine to machine on the same network?
Thanks for any clarification here.