`cmath.com`

DNSSEC	⚠️ Not signed
A	121.254.178.253^{🇰🇷 DACOM-NET121.254.128.0/17 contact noc@bora.net if necessary}
NS	`ns2.domainca.com` ⭐
		A	20.200.205.248^{🇰🇷 Microsoft20.192.0.0/10}
NS	`ns.domainca.com`
		A	43.201.170.100^{🇰🇷 Amazon43.200.0.0/14 EC2 ICN Prefix}
			PTR	`ec2-43-201-170-100.ap-northeast-2.compute.amazonaws.com`
SOA	`ns.domainca.com`root@domainca.com 2026-03-08 #18

`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=1778334696

Subdomains

www.cmath.com

Same first word

cmath.cn

cmath.xyz

cmath.co.kr

cmath.fr

cmath.com

cmath.eu

cmath.net

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DNS History

4 records (3 active, 1 former)

●NSns.domainca.com2015-08-20 → 2026-05-09 · 3 obs

○ 2008-03-18 19:16:30
● 2015-08-20 09:46:10
● 2026-05-09 13:57:46

●NSns2.domainca.com2015-08-20 → 2026-05-09 · 3 obs

○ 2008-03-18 19:16:30
● 2015-08-20 09:46:10
● 2026-05-09 13:57:46

○A121.254.178.2502015-08-20 → 2015-08-20 · 4 obs

○ 2008-03-18 19:16:30
● 2015-08-20 09:46:10
○ 2015-12-17 18:49:30
○ 2026-05-09 13:57:46

●A121.254.178.2532015-12-17 → 2026-05-09 · 3 obs

○ 2015-08-20 09:46:10
● 2015-12-17 18:49:30
● 2026-05-09 13:57:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
cmath.com	ns.domainca.com, ns2.domainca.com	2 records

✅ Authoritative Response

Server:43.201.170.100

NS records: ns.domainca.com, ns2.domainca.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cmath.com (unsigned zone)

⏱️ Timing

Total: 458ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`121.254.178.253`
NS	2	`ns.domainca.com, ns2.domainca.com`
SOA	1	`ns.domainca.com root.domainca.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns.domainca.com, ns2.domainca.com)

Analysis

Hierarchy

The parent of www.cmath.com is cmath.com.

IP Addresses

cmath.com points to IP number: 121.254.178.253.

Other host names such as venet.com, kimchiway.com, tiwc.com, abkoncore.com and bikmall.com share IPs with cmath.com.

Name Servers

cmath.com is delegated to two name servers: ns2.domainca.com and ns.domainca.com.

cmath.com shares the same name server setup as axvideo.com, promatech.com, mocam.com, opecs.com and earthline.com.

cmath.com shares some name servers with other domains, for instance yc-greenhouse.com.

Host names with a single IP:

ns2.domainca.com points to 20.200.205.248.

ns.domainca.com points to 43.201.170.100.

cmath.com - robtex.com

cmath.com

com