It's called "Bonjour" on Windows and Mac. Windows doesn't have support out of the box, but you can get it. https://learn.adafruit.com/bonjour-zeroconf-networking-for-w...

Edit: until build 1703 in 2017. Huh!

Did you change your router settings? It should all heal up with a simple broadcast packet.

It could be your router defaults to blocking broadcast packets related to wireless devices. (Either in or out)