usedbook.sg.		30 IN SOA ns1.linode.com. luanyong93.yahoo.com. (
				2019032119 ; serial
				14400      ; refresh (4 hours)
				14400      ; retry (4 hours)
				1209600    ; expire (2 weeks)
				86400      ; minimum (1 day)
				)

usedbook.sg.		30 IN TXT "v=spf1 include:_spf.google.com -all"

usedbook.sg.		30 IN A	139.162.44.196

Name servers:
usedbook.sg.		30 IN NS ns3.linode.com.
usedbook.sg.		30 IN NS ns2.linode.com.
usedbook.sg.		30 IN NS ns1.linode.com.
usedbook.sg.		30 IN NS ns5.linode.com.
usedbook.sg.		30 IN NS ns4.linode.com.