`co1.kr`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:82^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:96f9^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.0.130^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.150.249^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`courtney.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2682^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`courtney.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c282^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`courtney.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2282^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`courtney.ns.cloudflare.com`
		A	108.162.194.130^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`courtney.ns.cloudflare.com`
		A	162.159.38.130^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`courtney.ns.cloudflare.com`
		A	172.64.34.130^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`courtney.ns.cloudflare.com`
NS	`piers.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c10^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`piers.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c310^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`piers.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2310^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`piers.ns.cloudflare.com`
		A	108.162.195.16^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`piers.ns.cloudflare.com`
		A	162.159.44.16^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`piers.ns.cloudflare.com`
		A	172.64.35.16^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`piers.ns.cloudflare.com`
TXT	`google-site-verification=EPC88kwsIuFPcVHfNbLWONoDM-5y0wRVZkHa3EMZCR8`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.0.130, 172.67.150.249
		IPv6	2606:4700:3032::6815:82, 2606:4700:3037::ac43:96f9
SOA	`courtney.ns.cloudflare.com`dns@cloudflare.com serial=2399161881

`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=2603080650

Subdomains

postmaster.co1.kr

drama77.co1.kr

101.co1.kr

mail.co1.kr

ondisc.co1.kr

ssockso.co1.kr

(0x736578).co1.kr

Same first word

co1.net

co1.kr

co1.at

co1.org

co1.biz

co1.co

co1.info

co1.com

co1.cn

co1.jp

co1.ir

co1.ru

co1.cc

co1.pl

co1.eu

co1.de

Similar names

1co.co.uk

o1c.ru

1co.jp

o1c.blogspot.com

1oc.org

1co.ch

1co.com

1co.ltd

oc1.fi

oc1.co

oc1.eu

c1o.de

1co.gr

1oc.ru

1co.pl

oc1.us

oc1.com

oc1.net

c1o.kr

oc1.at

1co.ru

1co.dev

1co.eu

1oc.com

oc1.bplaced.net

1co.org

o1c.net

oc1.info

1oc.cn

1co.ca

o1c.com

oc1.de

1co.me

1co.de

oc1.co.uk

oc1.ru

1oc.de

1co.cn

oc1.top

oc1.org

1co.net

DNS History

13 records (6 active, 7 former)

●NScourtney.ns.cloudflare.com2026-02-17 → 2026-03-19 · 3 obs

○ 2017-07-28 16:33:48
● 2026-02-17 05:57:20
● 2026-03-19 22:27:06

○NSns3.hostcenter.co.kr2015-08-16 → 2017-07-28 · 4 obs

● 2015-08-16 17:39:40
● 2017-07-28 16:33:48
○ 2026-02-17 05:57:20
○ 2026-03-19 22:27:06

○NSns4.hostcenter.co.kr2015-08-16 → 2017-07-28 · 4 obs

● 2015-08-16 17:39:40
● 2017-07-28 16:33:48
○ 2026-02-17 05:57:20
○ 2026-03-19 22:27:06

●NSpiers.ns.cloudflare.com2026-02-17 → 2026-03-19 · 3 obs

○ 2017-07-28 16:33:48
● 2026-02-17 05:57:20
● 2026-03-19 22:27:06

○MXmail5.domainclub.kr2015-08-16 → 2026-02-17 · 4 obs

● 2015-08-16 17:39:40
● 2026-02-17 05:57:20
○ 2026-02-21 04:10:46
○ 2026-03-19 22:27:06

○MXmailq3.domainclub.kr2015-08-16 → 2026-02-17 · 4 obs

● 2015-08-16 17:39:40
● 2026-02-17 05:57:20
○ 2026-02-21 04:10:46
○ 2026-03-19 22:27:06

●A104.21.0.1302026-02-17 → 2026-03-19 · 6 obs

○ 2017-07-28 16:33:48
● 2026-02-17 05:57:20
○ 2026-02-21 04:10:46
○ 2026-02-27 00:59:40
● 2026-02-27 18:11:42
● 2026-03-19 22:27:06

○A172.64.80.12026-02-21 → 2026-02-27 · 5 obs

○ 2026-02-17 05:57:20
● 2026-02-21 04:10:46
● 2026-02-27 00:59:40
○ 2026-02-27 18:11:42
○ 2026-03-19 22:27:06

●A172.67.150.2492026-02-17 → 2026-03-19 · 6 obs

○ 2017-07-28 16:33:48
● 2026-02-17 05:57:20
○ 2026-02-21 04:10:46
○ 2026-02-27 00:59:40
● 2026-02-27 18:11:42
● 2026-03-19 22:27:06

○A221.143.20.1012015-08-16 → 2017-07-28 · 4 obs

● 2015-08-16 17:39:40
● 2017-07-28 16:33:48
○ 2026-02-17 05:57:20
○ 2026-03-19 22:27:06

○A2606:4700:130:436c:6f75:6466:6c61:72652026-02-21 → 2026-02-27 · 5 obs

○ 2026-02-17 05:57:20
● 2026-02-21 04:10:46
● 2026-02-27 00:59:40
○ 2026-02-27 18:11:42
○ 2026-03-19 22:27:06

●A2606:4700:3032::6815:822026-02-17 → 2026-03-19 · 6 obs

○ 2017-07-28 16:33:48
● 2026-02-17 05:57:20
○ 2026-02-21 04:10:46
○ 2026-02-27 00:59:40
● 2026-02-27 18:11:42
● 2026-03-19 22:27:06

●A2606:4700:3037::ac43:96f92026-02-17 → 2026-03-19 · 6 obs

○ 2017-07-28 16:33:48
● 2026-02-17 05:57:20
○ 2026-02-21 04:10:46
○ 2026-02-27 00:59:40
● 2026-02-27 18:11:42
● 2026-03-19 22:27:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
kr	g.dns.kr, b.dns.kr, e.dns.kr, c.dns.kr...	10 records
co1.kr	piers.ns.cloudflare.com, courtney.ns.cloudflare.com	-

✅ Authoritative Response

Server: 162.159.38.130

NS records: piers.ns.cloudflare.com, courtney.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for co1.kr (unsigned zone)

⏱️ Timing

Total: 1028ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`172.64.80.1`
AAAA	1	`2606:4700:130:436c:6f75:6466:6c61:7265`
NS	2	`courtney.ns.cloudflare.com, piers.ns.cloudflare.com`
TXT	1	`google-site-verification=EPC88kwsIuFPcVH`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`courtney.ns.cloudflare.com dns.cloudflar`

📌 Glue Records Collected

Total: 10

In-bailiwick: 10 (b.dns.kr, c.dns.kr, d.dns.kr...)

Analysis

Hierarchy

co1.kr is the parent of postmaster.co1.kr, drama77.co1.kr, 101.co1.kr, mail.co1.kr, ondisc.co1.kr and a few other host names.

IP Addresses

co1.kr maps to four IP numbers: 2606:4700:3032::6815:82, 2606:4700:3037::ac43:96f9, 104.21.0.130 and 172.67.150.249.

other host names include www.ouray.org, blacktieprofessional.com, community.isb.org, www.blacktieprofessional.com and countdown.nesskaf.com; they share IP numbers with co1.kr.

Name Servers

Two name servers courtney.ns.cloudflare.com and piers.ns.cloudflare.com handle the delegation for co1.kr.

co1.kr uses the same name server setup as other domains, including groupesocam.ca, eccegratum.it and txx.kr.

co1.kr at least partially shares name servers with other domains, for instance mn88.fit, uvuxube.top, entekhabeto.com, eg777eg.vip and sap2575rab.cc.

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

Six IP addresses per host:

courtney.ns.cloudflare.com points to 2606:4700:50::a29f:2682, 2803:f800:50::6ca2:c282, 2a06:98c1:50::ac40:2282, 108.162.194.130, 162.159.38.130 and 172.64.34.130; piers.ns.cloudflare.com points to 2606:4700:58::a29f:2c10, 2803:f800:50::6ca2:c310, 2a06:98c1:50::ac40:2310, 108.162.195.16, 162.159.44.16 and 172.64.35.16

co1.kr - robtex.com

co1.kr

kr

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

IP Addresses

Name Servers

`co1.kr`

`kr`