`drfreeschool.kr`

DNSSEC	⚠️ Not signed
A	2606:4700:3036::6815:1df2^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:9601^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.29.242^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.150.1^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`giancarlo.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c05^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`giancarlo.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c305^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`giancarlo.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2305^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`giancarlo.ns.cloudflare.com`
		A	108.162.195.5^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`giancarlo.ns.cloudflare.com`
		A	162.159.44.5^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`giancarlo.ns.cloudflare.com`
		A	172.64.35.5^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`giancarlo.ns.cloudflare.com`
NS	`mina.ns.cloudflare.com`
		A	2606:4700:50::a29f:26fb^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mina.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2fb^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`mina.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22fb^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`mina.ns.cloudflare.com`
		A	108.162.194.251^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mina.ns.cloudflare.com`
		A	162.159.38.251^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mina.ns.cloudflare.com`
		A	172.64.34.251^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mina.ns.cloudflare.com`
MX	`drfreeschool-kr.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:cc35::^{🇰🇷 Microsoft2a01:111:f000::/36}
			PTR	`mail-slxp216cu00200.inbound.protection.outlook.com`
		A	2a01:111:f403:cc35::1^{🇰🇷 Microsoft2a01:111:f000::/36}
			PTR	`mail-sevp216cu00101.inbound.protection.outlook.com`
		A	2a01:111:f403:cc35::2^{🇰🇷 Microsoft2a01:111:f000::/36}
			PTR	`mail-se2p216cu00602.inbound.protection.outlook.com`
		A	2a01:111:f403:cc37::^{🇰🇷 Microsoft2a01:111:f000::/36}
			PTR	`mail-puwp216cu00200.inbound.protection.outlook.com`
		A	52.101.153.0^{🇰🇷 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-slxp216cu00200.inbound.protection.outlook.com`
		A	52.101.153.1^{🇰🇷 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sevp216cu00101.inbound.protection.outlook.com`
		A	52.101.153.2^{🇰🇷 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-se2p216cu00602.inbound.protection.outlook.com`
		A	52.101.155.0^{🇰🇷 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-puwp216cu00200.inbound.protection.outlook.com`
TXT	`MS=ms32874602`
TXT	`google-site-verification=nEwkEE9LwPsa17EXOxdFjH5ye82GIzaHeAky1CV7cVA`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.29.242, 172.67.150.1
		IPv6	2606:4700:3036::6815:1df2, 2606:4700:3036::ac43:9601
SOA	`giancarlo.ns.cloudflare.com`dns@cloudflare.com serial=2399307904

`kr`

	DNSSEC	🔒 Signed (DS record present)
	NS	`g.dns.kr` ⭐
	NS	`b.dns.kr`
	NS	`c.dns.kr`
	NS	`d.dns.kr`
	NS	`e.dns.kr`
	NS	`f.dns.kr`
	SOA	`g.dns.kr`domain-manager@nic.or.kr serial=2603250782

Same first word

drfreeschool.kr

DNS History

17 records (7 active, 10 former)

●NSgiancarlo.ns.cloudflare.com2026-03-05 → 2026-03-25 · 3 obs

○ 2017-08-21 03:35:14
● 2026-03-05 11:55:18
● 2026-03-25 07:39:50

●NSmina.ns.cloudflare.com2026-03-05 → 2026-03-25 · 3 obs

○ 2017-08-21 03:35:14
● 2026-03-05 11:55:18
● 2026-03-25 07:39:50

○NSns.systemdoctor.co.kr2015-08-27 → 2017-08-21 · 4 obs

● 2015-08-27 07:43:16
● 2017-08-21 03:35:14
○ 2026-03-05 11:55:18
○ 2026-03-25 07:39:50

○NSns2.systemdoctor.co.kr2015-08-27 → 2015-10-01 · 4 obs

● 2015-08-27 07:43:16
● 2015-10-01 18:21:02
○ 2015-12-22 20:37:12
○ 2026-03-25 07:39:50

○MXalt1.aspmx.l.google.com2026-03-05 → 2026-03-06 · 3 obs

● 2026-03-05 11:55:18
● 2026-03-06 17:45:28
○ 2026-03-25 07:39:50

○MXalt2.aspmx.l.google.com2026-03-05 → 2026-03-06 · 3 obs

● 2026-03-05 11:55:18
● 2026-03-06 17:45:28
○ 2026-03-25 07:39:50

○MXalt3.aspmx.l.google.com2026-03-05 → 2026-03-06 · 3 obs

● 2026-03-05 11:55:18
● 2026-03-06 17:45:28
○ 2026-03-25 07:39:50

○MXalt4.aspmx.l.google.com2026-03-05 → 2026-03-06 · 3 obs

● 2026-03-05 11:55:18
● 2026-03-06 17:45:28
○ 2026-03-25 07:39:50

○MXaspmx.l.google.com2026-03-05 → 2026-03-06 · 3 obs

● 2026-03-05 11:55:18
● 2026-03-06 17:45:28
○ 2026-03-25 07:39:50

●MXdrfreeschool-kr.mail.protection.outlook.com2026-03-25 → 2026-03-25 · 2 obs

○ 2026-03-06 17:45:28
● 2026-03-25 07:39:50

●A104.21.29.2422026-03-05 → 2026-03-25 · 4 obs

○ 2017-08-21 03:35:14
● 2026-03-05 11:55:18
○ 2026-03-06 17:45:28
● 2026-03-25 07:39:50

○A172.64.80.12026-03-06 → 2026-03-06 · 3 obs

○ 2026-03-05 11:55:18
● 2026-03-06 17:45:28
○ 2026-03-25 07:39:50

●A172.67.150.12026-03-05 → 2026-03-25 · 4 obs

○ 2017-08-21 03:35:14
● 2026-03-05 11:55:18
○ 2026-03-06 17:45:28
● 2026-03-25 07:39:50

○A2606:4700:130:436c:6f75:6466:6c61:72652026-03-06 → 2026-03-06 · 3 obs

○ 2026-03-05 11:55:18
● 2026-03-06 17:45:28
○ 2026-03-25 07:39:50

●A2606:4700:3036::6815:1df22026-03-05 → 2026-03-25 · 4 obs

○ 2017-08-21 03:35:14
● 2026-03-05 11:55:18
○ 2026-03-06 17:45:28
● 2026-03-25 07:39:50

●A2606:4700:3036::ac43:96012026-03-05 → 2026-03-25 · 4 obs

○ 2017-08-21 03:35:14
● 2026-03-05 11:55:18
○ 2026-03-06 17:45:28
● 2026-03-25 07:39:50

○A61.111.255.542015-08-27 → 2017-08-21 · 4 obs

● 2015-08-27 07:43:16
● 2017-08-21 03:35:14
○ 2026-03-05 11:55:18
○ 2026-03-25 07:39:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
kr	b.dns.kr, c.dns.kr, d.dns.kr, e.dns.kr...	-
drfreeschool.kr	mina.ns.cloudflare.com, giancarlo.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.194.251

NS records: mina.ns.cloudflare.com, giancarlo.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for drfreeschool.kr (unsigned zone)

⏱️ Timing

Total: 1247ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.150.1, 104.21.29.242`
AAAA	2	`2606:4700:3036::ac43:9601, 2606:4700:3036::6815:1df2`
NS	2	`giancarlo.ns.cloudflare.com, mina.ns.cloudflare.com`
MX	1	`drfreeschool-kr.mail.protection.outlook.`
TXT	2	`MS=ms32874602, google-site-verification=nEwkEE9LwPsa17E`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`giancarlo.ns.cloudflare.com dns.cloudfla`

Analysis

IP Addresses

drfreeschool.kr maps to four IP numbers: 2606:4700:3036::6815:1df2, 2606:4700:3036::ac43:9601, 104.21.29.242 and 172.67.150.1.

other host names include www.batikdistro.com, deejaisoftware.com, blog.greentips1.com, studiobside.com and pulsar.dn.ua; they share IP numbers with drfreeschool.kr.

Name Servers

Two name servers giancarlo.ns.cloudflare.com and mina.ns.cloudflare.com handle the delegation for drfreeschool.kr.

drfreeschool.kr shares the same name server setup as other domains, for instance riuusa.com, privateholidayrentals.co.za, usam.ac.cr, sinodegkt.org and frontierstrvl.co.uk.

drfreeschool.kr at least partially shares name servers with other domains, for instance leero.ir, depokceme.com, theswarnim.com, ramco.ae and signalgratis.com.

These name servers are commonly used alongside ligia.ns.cloudflare.com.

Six IP addresses per host:

giancarlo.ns.cloudflare.com points to 2606:4700:58::a29f:2c05, 2803:f800:50::6ca2:c305, 2a06:98c1:50::ac40:2305, 108.162.195.5, 162.159.44.5 and 172.64.35.5; mina.ns.cloudflare.com points to 2606:4700:50::a29f:26fb, 2803:f800:50::6ca2:c2fb, 2a06:98c1:50::ac40:22fb, 108.162.194.251, 162.159.38.251 and 172.64.34.251

Mail Servers

drfreeschool.kr is handled by a single mail server, drfreeschool-kr.mail.protection.outlook.com.

Hostname drfreeschool-kr.mail.protection.outlook.com resolves to eight IP numbers: 2a01:111:f403:cc35::, 2a01:111:f403:cc35::1, 2a01:111:f403:cc35::2, 2a01:111:f403:cc37::, 52.101.153.0, 52.101.153.1, 52.101.153.2 and 52.101.155.0.

drfreeschool.kr - robtex.com

drfreeschool.kr

kr

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`drfreeschool.kr`

`kr`