DNS/TCP/instagram.comについて、ここに記述してください。 

$ dig www.instagram.com @ns-384.awsdns-48.com.

; <<>> DiG 9.12.1 <<>> www.instagram.com @ns-384.awsdns-48.com.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25394
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.instagram.com.             IN      A

;; ANSWER SECTION:
www.instagram.com.      3600    IN      CNAME   z-p42-instagram.c10r.facebook.com.

;; AUTHORITY SECTION:
instagram.com.          172800  IN      NS      ns-1349.awsdns-40.org.
instagram.com.          172800  IN      NS      ns-2016.awsdns-60.co.uk.
instagram.com.          172800  IN      NS      ns-384.awsdns-48.com.
instagram.com.          172800  IN      NS      ns-868.awsdns-44.net.

;; Query time: 167 msec
;; SERVER: 205.251.193.128#53(205.251.193.128)
;; WHEN: Sun Apr 22 13:29:13 JST 2018
;; MSG SIZE  rcvd: 227

../facebook.com 

z-p42-instagram.c10r.facebook.com. 60 IN A      31.13.82.174