tkdlab.com. 3600 IN A 112.78.112.69 tkdlab.com. 3600 IN NS ns2.dns.ne.jp. tkdlab.com. 3600 IN NS ns1.dns.ne.jp. tkdlab.com. 3600 IN SOA master.dns.ne.jp. tech.sakura.ad.jp. ( 2009123010 ; serial 3600 ; refresh (1 hour) 900 ; retry (15 minutes) 3600000 ; expire (5 weeks 6 days 16 hours) 3600 ; minimum (1 hour) ) tkdlab.com. 3600 IN MX 10 tkdlab.com.