Check for Listening Port SQL Server

DECLARE @tcp_port nvarchar(5)
EXEC xp_regread
@rootkey = ‘HKEY_LOCAL_MACHINE’,
@key = ‘SOFTWARE\MICROSOFT\MSSQLSERVER\MSSQLSERVER\SUPERSOCKETNETLIB\TCP’,
@value_name = ‘TcpPort’,
@value = @tcp_port OUTPUT

select @tcp_port

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