`sungkyul.edu`

DNSSEC	⚠️ Not signed
A	220.149.131.100^{🇰🇷 KT-NET220.149.131.0/24 Sungkyul University}
A	220.149.131.101^{🇰🇷 KT-NET220.149.131.0/24 Sungkyul University}
NS	`sungkyul.edu` ⭐
		A	220.149.131.100^{🇰🇷 KT-NET220.149.131.0/24 Sungkyul University}
		A	220.149.131.101^{🇰🇷 KT-NET220.149.131.0/24 Sungkyul University}
NS	`hana.sungkyul.ac.kr` ⚠️ Not in zone NS records
		A	220.149.131.100^{🇰🇷 KT-NET220.149.131.0/24 Sungkyul University}
NS	`hana1.sungkyul.ac.kr` ⚠️ Not in zone NS records
		A	220.149.131.101^{🇰🇷 KT-NET220.149.131.0/24 Sungkyul University}
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c17::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bl-in-f27.1e100.net`
		A	172.253.115.27^{🇺🇸 Google172.253.115.0/24}
			PTR	`bg-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1a^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f26.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`google-site-verification=TYPc_b-a-XIqLmcDI9Iu77T0OhxKxeZeyqQFwWXiPBk`
TXT	`google-site-verification=MULmM_S0urbaQ6rXTsvqRyR2xpN0hPkmA3z0BpqSYh8`
TXT	`MS=0C3CA0336442CEF5D0B6110322F18F2B176743C5`
TXT	`v=spf1 ip4:220.149.131.70 ip4:220.149.131.26 include:_spf.google.com -all`
SOA	`sungkyul.edu`root@sungkyul.ac.kr 2015-06-18 #19

`edu`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.edu-servers.net` ⭐
	NS	`b.edu-servers.net`
	NS	`c.edu-servers.net`
	NS	`d.edu-servers.net`
	NS	`e.edu-servers.net`
	NS	`f.edu-servers.net`
	NS	`g.edu-servers.net`
	NS	`h.edu-servers.net`
	NS	`i.edu-servers.net`
	NS	`j.edu-servers.net`
	NS	`k.edu-servers.net`
	NS	`l.edu-servers.net`
	NS	`m.edu-servers.net`
	SOA	`a.edu-servers.net`nstld@verisign-grs.com serial=1783259341

NS for

sungkyul.edu

Subdomains

hana1.sungkyul.edu

mail.sungkyul.edu

duke.sungkyul.edu

hana.sungkyul.edu

Same first word

sungkyul.ac.kr

sungkyul.org

sungkyul.edu

DNS History

15 records (10 active, 5 former)

●NShana.sungkyul.ac.kr2026-03-14 → 2026-07-05 · 3 obs

○ 2018-01-24 22:06:22
● 2026-03-14 06:10:14
● 2026-07-05 13:49:32

○NShana.sungkyul.edu2015-07-16 → 2018-01-24 · 4 obs

● 2015-07-16 21:11:00
● 2018-01-24 22:06:22
○ 2026-03-14 06:10:14
○ 2026-07-05 13:49:32

●NShana1.sungkyul.ac.kr2026-03-14 → 2026-07-05 · 3 obs

○ 2018-01-24 22:06:22
● 2026-03-14 06:10:14
● 2026-07-05 13:49:32

○NShana1.sungkyul.edu2015-07-16 → 2018-01-24 · 4 obs

● 2015-07-16 21:11:00
● 2018-01-24 22:06:22
○ 2026-03-14 06:10:14
○ 2026-07-05 13:49:32

●NSsungkyul.edu2026-03-14 → 2026-07-05 · 3 obs

○ 2018-01-24 22:06:22
● 2026-03-14 06:10:14
● 2026-07-05 13:49:32

●MXalt1.aspmx.l.google.com2026-03-14 → 2026-07-05 · 3 obs

○ 2018-01-24 22:06:22
● 2026-03-14 06:10:14
● 2026-07-05 13:49:32

●MXalt2.aspmx.l.google.com2026-03-14 → 2026-07-05 · 3 obs

○ 2018-01-24 22:06:22
● 2026-03-14 06:10:14
● 2026-07-05 13:49:32

●MXalt3.aspmx.l.google.com2026-03-14 → 2026-07-05 · 3 obs

○ 2018-01-24 22:06:22
● 2026-03-14 06:10:14
● 2026-07-05 13:49:32

●MXalt4.aspmx.l.google.com2026-03-14 → 2026-07-05 · 3 obs

○ 2018-01-24 22:06:22
● 2026-03-14 06:10:14
● 2026-07-05 13:49:32

●MXaspmx.l.google.com2026-03-14 → 2026-07-05 · 3 obs

○ 2018-01-24 22:06:22
● 2026-03-14 06:10:14
● 2026-07-05 13:49:32

○MXhana5.sungkyul.edu2015-07-16 → 2018-01-24 · 4 obs

● 2015-07-16 21:11:00
● 2018-01-24 22:06:22
○ 2026-03-14 06:10:14
○ 2026-07-05 13:49:32

○MXmail.sungkyul.edu2015-07-16 → 2018-01-24 · 4 obs

● 2015-07-16 21:11:00
● 2018-01-24 22:06:22
○ 2026-03-14 06:10:14
○ 2026-07-05 13:49:32

○A211.221.246.22015-07-16 → 2018-01-24 · 4 obs

● 2015-07-16 21:11:00
● 2018-01-24 22:06:22
○ 2026-03-14 06:10:14
○ 2026-07-05 13:49:32

●A220.149.131.1002026-03-14 → 2026-07-05 · 3 obs

○ 2018-01-24 22:06:22
● 2026-03-14 06:10:14
● 2026-07-05 13:49:32

●A220.149.131.1012026-03-14 → 2026-07-05 · 3 obs

○ 2018-01-24 22:06:22
● 2026-03-14 06:10:14
● 2026-07-05 13:49:32

🔍 DNS Trace

Analysis

Hierarchy

sungkyul.edu has four subdomains: hana1.sungkyul.edu, mail.sungkyul.edu, duke.sungkyul.edu and hana.sungkyul.edu.

Name Server Role

sungkyul.edu has sungkyul.edu as one of its name servers, making it self-hosted for DNS delegation.

It is common to find hana1.sungkyul.ac.kr and hana.sungkyul.ac.kr serving as name servers together with sungkyul.edu.

IP Addresses

sungkyul.edu points to the IP addresses 220.149.131.100 and 220.149.131.101

Among the host names that share IP numbers with sungkyul.edu are hana1.sungkyul.edu, sungkyul.ac.kr, hana.sungkyul.edu and two others.

Name Servers

sungkyul.edu is delegated to three name servers: sungkyul.edu, hana1.sungkyul.ac.kr and hana.sungkyul.ac.kr.

sungkyul.edu shares at least some of its name servers with other domains, such as sungkyul.ac.kr.

Hosts with two IP numbers each:

sungkyul.edu points to 220.149.131.100 and 220.149.131.101.

Hosts that resolve to one IP address:

hana1.sungkyul.ac.kr points to 220.149.131.101.

hana.sungkyul.ac.kr points to 220.149.131.100.

sungkyul.edu and hana.sungkyul.ac.kr are host names that each point to 220.149.131.100 IP addresses.

sungkyul.edu and hana1.sungkyul.ac.kr are host names that each point to 220.149.131.101 IP addresses.

Mail Servers

sungkyul.edu has five mail servers, which are aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

sungkyul.edu shares at least some of its mail servers with other domains — for example fraugiselegastinet.com, cortilidiverona.com, institutopremier.com.br and two more.

These mail servers tend to be used in conjunction with alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and two additional mail servers.

Hosts with two IP numbers each:

aspmx.l.google.com points to 172.253.115.27 and 2607:f8b0:4004:c17::1b.

alt1.aspmx.l.google.com points to 108.177.123.27 and 2800:3f0:4003:c0f::1a.

alt2.aspmx.l.google.com points to 172.253.116.27 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com points to 192.178.223.26 and 2a00:1450:4009:c0f::1b.

alt4.aspmx.l.google.com points to 172.253.157.26 and 2a00:1450:400c:c23::1a.