Hello -
It is very difficult for someone to help you without a description of your LAN, and how your hub is connected to it.
What's the color of the hub's LED?
Have you tried going to http://findmyhub.hubitat.com?
Have you tried using http://hubitat.local?
Have you tried using @thebearmay's Javascript Hub Finder?
Answers to these questions would be useful:
What kind of internet connection do you have?
Brand/model of modem?
Brand/model of router?
Brand/model of any network switches?
Do you have any VLANs?
Is your phone in the same VLAN as the hub?
