$TTL 500
@		IN	SOA	tjener.intern. root.postoffice.intern. (
				1 ; Serialnumber
				3600	; Refresh
				1800	; Retry
				720000	; Expire
				6400 )	; Minimum TTL
			NS	tjener.intern.
			MX	10 tjener.intern.
254			PTR	ltspserver01.subnet01.intern.
