`coolffice.com`

DNSSEC	⚠️ Not signed
A	211.110.140.158^{🇰🇷 SKB-NET211.110.0.0/16 SK Broadband}
NS	`ns11.dnszi.com` ⭐
		A	121.78.251.24^{🇰🇷 KINXIDC-AS-KR121.78.224.0/19 KINX-Net}
NS	`ns22.dnszi.com`
		A	121.78.72.44^{🇰🇷 KINXIDC-AS-KR121.78.72.0/24 KINX-IDC}
			PTR	`ns22.dnszi.com`
NS	`ns37.dnszi.com`
		A	58.120.225.177^{🇰🇷 SKB-NET58.120.0.0/13 auto-generated route object for 58.120.0.0/13}
			PTR	`ns37.dnszi.com`
NS	`ns53.dnszi.com`
		A	27.1.16.85^{🇰🇷 DAOU-AS-KR27.1.16.0/22 DAOU Tech}
			PTR	`ns53.dnszi.com`
NS	`ns77.dnszi.com`
		A	121.78.251.30^{🇰🇷 KINXIDC-AS-KR121.78.224.0/19 KINX-Net}
SOA	`ns11.dnszi.com`root@dnszi.com 2026-08-05 #1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1786136834

Same first word

coolffice.com

Similar names

coloffice.com

DNS History

12 records (6 active, 6 former)

○NSns.kpost.com2015-05-17 → 2018-09-22 · 4 obs

● 2015-05-17 01:57:42
● 2018-09-22 16:55:18
○ 2026-07-04 14:18:16
○ 2026-08-07 21:35:12

○NSns1.kpost.com2015-05-17 → 2018-09-22 · 4 obs

● 2015-05-17 01:57:42
● 2018-09-22 16:55:18
○ 2026-07-04 14:18:16
○ 2026-08-07 21:35:12

●NSns11.dnszi.com2026-07-04 → 2026-08-07 · 3 obs

○ 2018-09-22 16:55:18
● 2026-07-04 14:18:16
● 2026-08-07 21:35:12

●NSns22.dnszi.com2026-07-04 → 2026-08-07 · 3 obs

○ 2018-09-22 16:55:18
● 2026-07-04 14:18:16
● 2026-08-07 21:35:12

●NSns37.dnszi.com2026-07-04 → 2026-08-07 · 3 obs

○ 2018-09-22 16:55:18
● 2026-07-04 14:18:16
● 2026-08-07 21:35:12

●NSns53.dnszi.com2026-07-04 → 2026-08-07 · 3 obs

○ 2018-09-22 16:55:18
● 2026-07-04 14:18:16
● 2026-08-07 21:35:12

●NSns77.dnszi.com2026-07-04 → 2026-08-07 · 3 obs

○ 2018-09-22 16:55:18
● 2026-07-04 14:18:16
● 2026-08-07 21:35:12

○MXspam.coolffice.com2015-05-17 → 2017-01-05 · 4 obs

● 2015-05-17 01:57:42
● 2017-01-05 14:42:18
○ 2018-09-22 16:55:18
○ 2026-08-07 21:35:12

○MXspam01.coolffice.com2018-09-22 → 2018-09-22 · 4 obs

○ 2017-01-05 14:42:18
● 2018-09-22 16:55:18
○ 2026-07-04 14:18:16
○ 2026-08-07 21:35:12

○A210.122.9.832018-09-22 → 2018-09-22 · 4 obs

○ 2017-01-05 14:42:18
● 2018-09-22 16:55:18
○ 2026-07-04 14:18:16
○ 2026-08-07 21:35:12

●A211.110.140.1582026-07-04 → 2026-08-07 · 3 obs

○ 2018-09-22 16:55:18
● 2026-07-04 14:18:16
● 2026-08-07 21:35:12

○A222.122.143.1402015-05-17 → 2017-01-05 · 4 obs

● 2015-05-17 01:57:42
● 2017-01-05 14:42:18
○ 2018-09-22 16:55:18
○ 2026-08-07 21:35:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, k.gtld-servers.net, a.gtld-servers.net, e.gtld-servers.net...	-
coolffice.com	ns11.dnszi.com, ns22.dnszi.com, ns37.dnszi.com, ns53.dnszi.com...	5 records

✅ Authoritative Response

Server:27.1.16.85

NS records: ns11.dnszi.com, ns22.dnszi.com, ns37.dnszi.com, ns53.dnszi.com, ns77.dnszi.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coolffice.com (unsigned zone)

⏱️ Timing

Total: 3506ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`211.110.140.158`
NS	5	`ns11.dnszi.com, ns77.dnszi.com...`
SOA	1	`ns11.dnszi.com root.dnszi.com`

📌 Glue Records Collected

Total: 5

Out-of-bailiwick: 5 (ns11.dnszi.com, ns22.dnszi.com, ns37.dnszi.com...)

Analysis

IP Addresses

coolffice.com resolves to one IP address: 211.110.140.158.

Among others, heendol.or.kr, welfarebox.com, networks.or.kr and www.networks.or.kr resolve to the same IP numbers as coolffice.com.

Name Servers

coolffice.com has five name servers, which are ns11.dnszi.com, ns22.dnszi.com, ns37.dnszi.com and two others.

coolffice.com partially shares its NS delegation with several other domains, including wikimedia.kr, nowwaiting.com, cjlandkids.kr and two others.

These name servers are regularly seen alongside ns53.dnszi.com and ns77.dnszi.com as name servers.

Hosts with just one IP address:

ns11.dnszi.com has the IP address 121.78.251.24.

ns22.dnszi.com has the IP address 121.78.72.44.

ns37.dnszi.com has the IP address 58.120.225.177.

ns53.dnszi.com has the IP address 27.1.16.85.

ns77.dnszi.com has the IP address 121.78.251.30.