Hello,
You can know the name of your Hyper-V host from your VM from the registry :
The information is located under HKLM:SoftWareMicrosoftVirtual MachineGuestParameters :
Get-ItemProperty -Path 'HKLM:SOFTWAREMicrosoftVirtual MachineGuestParameters' -Name Hostname
You may noticed that this is an Azure Hyper-V host name, pretty meaningful !