I recently added a wildcard A record to my domain (*.root.com), mapping it to a certain elastic ip on AWS.

I've configured apache to redirect all references to something.root.com to root.com, except for one specific "dev" subdomain, which is hosting its own site (a Django app, specifically).

The Problem: This setup works perfectly for me on my computer. But on other computers around the office, it doesn't seem to work.

Specifically, trying to visit dev.root.com gives an "unable to find server" error. Pinging dev.root.com gives a "cannot resolve hostname" error.

The weird thing: pinging any other subdomain of root.com does work, from all machines. I would think this was all due to DNS propagation, except all the computers are behind the same office router, so how could that be the case?

Any ideas?