1. watchA
分かりやすい lame delegation
2. whois
philips. 172800 IN NS d.nic.philips. philips. 172800 IN NS c.nic.philips. philips. 172800 IN NS a.nic.philips. philips. 172800 IN NS b.nic.philips.
3. history
;; AUTHORITY SECTION: www.philips. 3600 IN NS ns1.ext.philips.com. www.philips. 3600 IN NS ns2.ext.philips.com. www.philips. 3600 IN NS ns3.ext.philips.com. $ dig -t a www.philips @ns1.ext.philips.com. ; <<>> DiG 9.11.3-1ubuntu1.12-Ubuntu <<>> -t a www.philips @ns1.ext.philips.com. ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 48608 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ; COOKIE: 6ef6b24d6d416416cc1df9145fdb0f35cd86aaa1382bfe6b (good) ;; QUESTION SECTION: ;www.philips. IN A ;; Query time: 269 msec ;; SERVER: 57.67.40.20#53(57.67.40.20) ;; WHEN: Thu Dec 17 16:56:37 JST 2020 ;; MSG SIZE rcvd: 68