Hi @Vinay Bhardwaj ,
maybe this PowerShell snippet is helpful:
$domainName = "<YourDomainName.SomeThing>"
$tentant = Get-AzTenant | Where-Object {$_.Domains -contains $domainName}
Get-AzSubscription -TenantId $tentant
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten