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   rinsuki (rinsuki@mstdn.rinsuki.net)'s status on Wednesday, 30-Aug-2023 02:39:05 JST rinsuki

   そういう時は一個上が glue record を返してくれる

   $ dig docomo.ne.jp @A.DNS.JP

   (...snip...)

   ;; AUTHORITY SECTION:
   docomo.ne.jp. 86400 IN NS ns001.docomo.ne.jp.
   docomo.ne.jp. 86400 IN NS ns002.docomo.ne.jp.

   ;; ADDITIONAL SECTION:
   ns002.docomo.ne.jp. 86400 IN A 49.102.160.24
   ns001.docomo.ne.jp. 86400 IN A 49.102.160.23