Question and response
Question
dig spf.c-cast.jp. TXT
Answer
spf.c-cast.jp. 300 TXT "v=spf1 ip4:45.116.135.10/31 ip4:45.116.135.12/31 ip4:103.10.39.2/31 ip4:103.10.39.4/31 ip4:103.37.134.11 ip4:103.37.134.12/30 ip4:103.37.134.16/30 ip4:103.37.134.20 ~all"
Authority
c-cast.jp. 86400 NS 01.dnsv.jp.
c-cast.jp. 86400 NS 02.dnsv.jp.
c-cast.jp. 86400 NS 03.dnsv.jp.
c-cast.jp. 86400 NS 04.dnsv.jp.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0