mailgw01.peapod.com has no NS records.
NS records for this zone are defined at peapod.com.
NS records for this zone are defined at peapod.com.
Question and response
Question
dig mailgw01.peapod.com. NS
Answer
The response has no answer records.
Authority
peapod.com. 1800 SOA ns4.peapod.com. dns.cloudflare.com. 2399235198 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0