Any Domains lookup test through south Korea LDNS. This shell script for Domain lookup via Korea LDNS and other public DNS of Big providers.
A second filed numeric values are TTL, a sixth filed numeric values are Query times.
~$ kdig.sh foo.com
01) foo.com. 600 A 23.23.86.44 [KT:168.126.63.1] 231 qr-rd-ra
02) foo.com. 600 A 23.23.86.44 [KT_LDNS:168.126.63.2] 220 qr-rd-ra
03) foo.com. 600 A 23.23.86.44 [LGU:164.124.101.2] 206 qr-rd-ra
04) foo.com. 600 A 23.23.86.44 [LGU:203.248.252.2] 318 qr-rd-ra
05) foo.com. 600 A 23.23.86.44 [SKB:210.220.163.82] 288 qr-rd-ra
06) foo.com. 438 A 23.23.86.44 [SKB:219.250.36.130] 5 qr-rd-ra
07) foo.com. 402 A 23.23.86.44 [CJHello:180.182.54.1] 7 qr-rd-ra
08) foo.com. 221 A 23.23.86.44 [CJHello:180.182.54.2] 8 qr-rd-ra
09) foo.com. 401 A 23.23.86.44 [Google:8.8.8.8] 70 qr-rd-ra
10) foo.com. 599 A 23.23.86.44 [Google:8.8.4.4] 320 qr-rd-ra
11) foo.com. 223 A 23.23.86.44 [Cloudflare:1.1.1.1] 18 qr-rd-ra
12) foo.com. 223 A 23.23.86.44 [Cloudflare:1.0.0.1] 5 qr-rd-ra
13) foo.com. 395 A 23.23.86.44 [OpenDNS:208.67.222.222] 82 qr-rd-ra
14) foo.com. 418 A 23.23.86.44 [OpenDNS:208.67.220.220] 84 qr-rd-ra
15) foo.com. 230 A 23.23.86.44 [ComodoSecDNS:8.26.56.26] 233 qr-rd-ra
16) foo.com. 230 A 23.23.86.44 [ComodoSecDNS:8.20.247.20] 188 qr-rd-ra
17) foo.com. 231 A 23.23.86.44 [NortonSecA:199.85.126.10] 84 qr-rd-ra
18) foo.com. 231 A 23.23.86.44 [NortonSecA:199.85.127.10] 537 qr-rd-ra
19) foo.com. 231 A 23.23.86.44 [NortonSecB:199.85.126.20] 87 qr-rd-ra
20) foo.com. 230 A 23.23.86.44 [NortonSecB:199.85.127.20] 234 qr-rd-ra
21) foo.com. 230 A 23.23.86.44 [NortonSecC:199.85.126.30] 97 qr-rd-ra
22) foo.com. 230 A 23.23.86.44 [NortonSecC:199.85.127.30] 380 qr-rd-ra
* NortonSecA is Security (malware, phishing sites and scam sites)
* NortonSecB is Security + Pornography
* NortonSecC is Security + Pornography + Non-Family Friendly
-- uniq result (1) ----------------------------------------------
23.23.86.44