Zone apex
Start of authority
Email
Serial
2026022201
Refresh
3h
Retry
1h
Expire
7d
Negative cache TTL
1m
Question and response
Question
dig gslb4.comcast.com. SOA
Answer
gslb4.comcast.com. 500 SOA gtd04-d.northlake.il.ndcchgo.comcast.net. hostmaster.gtd04-d.northlake.il.ndcchgo.comcast.net. 2026022201 10800 3600 604800 60
Authority
gslb4.comcast.com. 300 NS gtd04-d.hillsboro.or.ndchlsbr.comcast.net.
gslb4.comcast.com. 300 NS gtd04-d.ashburn.va.ndcasbn.comcast.net.
gslb4.comcast.com. 300 NS gtd04-d.northlake.il.ndcchgo.comcast.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0