As mentioned in u1686_grawity's answer, nslookup from Windows Command Prompt does not work with mDNS.
To get the hostnameIP address of a device you can use the PowerShell command Resolve-DnsName <hostname>
.
> Resolve-DnsName gp800-49d1a
Name Type TTL Section IPAddress
---- ---- --- ------- ---------
gp800-49d1a.local AAAA 120 Answer fe80::e700:63f:1807:adf2
gp800-49d1a.local A 120 Answer 169.254.93.130