Get Short Name from FQDN

Got a list of FQDN names and just need the short name?  use left and search.  See my example formula used in B2 and B3

	A	B
1	FQDN	Short Name
2	Server1.domain.com	Server1	=LEFT(B2,SEARCH(".",B2)-1)
3	Server2.domain.domain.com	Server2	=LEFT(B3,SEARCH(".",B3)-1)