ww1.bbtower.co.jp has no NS records.
NS records for this zone are defined at bbtower.co.jp.
NS records for this zone are defined at bbtower.co.jp.
Question and response
Question
dig ww1.bbtower.co.jp. NS
Answer
The response has no answer records.
Authority
bbtower.co.jp. 900 SOA pdns10.bbtower.ne.jp. noc.bbtower.ad.jp. 2026030601 3600 1200 3600000 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0