`ctbgroup.org`

DNSSEC	⚠️ Not signed
A	121.254.129.97^{🇰🇷 DACOM-NET121.254.128.0/17 contact noc@bora.net if necessary}
NS	`lina.m2comm.co.kr` ⭐
		A	121.254.129.66^{🇰🇷 DACOM-NET121.254.128.0/17 contact noc@bora.net if necessary}
NS	`alpa.m2comm.co.kr`
		A	222.231.33.146^{🇰🇷 DACOM-NET222.231.0.0/18 contact noc@bora.net if necessary}
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4023:c0b::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`dd-in-f26.1e100.net`
		A	74.125.137.26^{🇺🇸 Google74.125.137.0/24}
			PTR	`dy-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
		A	2607:f8b0:4023:2801::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`lcausi-in-f26.1e100.net`
		A	192.178.128.27^{🇺🇸 Google192.178.128.0/24}
			PTR	`lcausi-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽²⁰⁾
		A	2607:f8b0:4023:1015::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`yudfwta-in-f26.1e100.net`
		A	172.253.135.26^{🇺🇸 Google172.253.135.0/24}
			PTR	`yudfwta-in-f26.1e100.net`
MX	`aspmx2.googlemail.com`⁽³⁰⁾
		A	2607:f8b0:4023:2801::1b^{🇺🇸 Google2607:f8b0::/32}
			PTR	`lcausi-in-f27.1e100.net`
		A	192.178.128.27^{🇺🇸 Google192.178.128.0/24}
			PTR	`lcausi-in-f27.1e100.net`
MX	`aspmx3.googlemail.com`⁽³⁰⁾
		A	2607:f8b0:4023:3003::1b^{🇺🇸 Google2607:f8b0::/32}
			PTR	`yulnkjt-in-f27.1e100.net`
		A	172.253.145.26^{🇺🇸 Google172.253.145.0/24}
			PTR	`yulnkjt-in-f26.1e100.net`
MX	`aspmx4.googlemail.com`⁽³⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.27^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f27.1e100.net`
MX	`aspmx5.googlemail.com`⁽³⁰⁾
		A	2a00:1450:400c:c00::1a^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`ws-in-f26.1e100.net`
			PTR	`ws-in-x1a.1e100.net`
		A	173.194.76.27^{🇺🇸 Google173.194.76.0/24}
			PTR	`ws-in-f27.1e100.net`
TXT	`v=spf1 include:gmail.com ip4:121.254.129.73 ip4:121.254.129.97 ~all`
TXT	`ysf39ddmbb2gky99lp0m1pzrp4wd7r0m`
TXT	`ccqsj5rxyfv8j7cq1lk64zx21j13dxzc`
SOA	`lina.m2comm.co.kr`root@m2comm.co.kr 2024-05-22 #1

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1774628172

Subdomains

www.ctbgroup.org

Same first word

ctbgroup.be

ctbgroup.com

ctbgroup.es

ctbgroup.org

Similar names

btcgroup.eu

grupobtc.es

tcbgroup.co.za

tbcgroup.ge

btcgroup.sk

tbcgroup.com

btcgroup.ru

btcgroup.co.za

cbtgroup.com

tcbgroup.eu

tbcgroup.net

btcgroup.com

procutbg.com

groupbtc.com

btcgroup.net

tcbgroup.se

cbtgroup.ie

tbcgroup.com.sg

tbcgroup.co

btcgroup.pl

tbcgroup.in

groupcbt.com

tbcgroup.ru

bctgroup.net

tbcgroup.es

bctgroup.com

procutgb.com

btcgroup.us

tbcgroup.cn

tcbgroup.biz

bctgroup.ch

tcbgroup.co.uk

btcgroup.nl

grupotbc.com

bctgroup.com.au

tcbgroup.co

DNS History

14 records (10 active, 4 former)

●NSalpa.m2comm.co.kr2020-02-04 → 2026-03-27 · 3 obs

○ 2017-03-28 06:48:52
● 2020-02-04 16:19:42
● 2026-03-27 16:28:02

●NSlina.m2comm.co.kr2020-02-04 → 2026-03-27 · 3 obs

○ 2017-03-28 06:48:52
● 2020-02-04 16:19:42
● 2026-03-27 16:28:02

○NSns1.sedoparking.com2017-03-28 → 2017-03-28 · 3 obs

● 2017-03-28 06:48:52
○ 2020-02-04 16:19:42
○ 2026-03-27 16:28:02

○NSns2.sedoparking.com2017-03-28 → 2017-03-28 · 3 obs

● 2017-03-28 06:48:52
○ 2020-02-04 16:19:42
○ 2026-03-27 16:28:02

●MXalt1.aspmx.l.google.com2020-02-04 → 2026-03-27 · 3 obs

○ 2017-03-28 06:48:52
● 2020-02-04 16:19:42
● 2026-03-27 16:28:02

●MXalt2.aspmx.l.google.com2020-02-04 → 2026-03-27 · 3 obs

○ 2017-03-28 06:48:52
● 2020-02-04 16:19:42
● 2026-03-27 16:28:02

●MXaspmx.l.google.com2020-02-04 → 2026-03-27 · 3 obs

○ 2017-03-28 06:48:52
● 2020-02-04 16:19:42
● 2026-03-27 16:28:02

●MXaspmx2.googlemail.com2020-02-04 → 2026-03-27 · 3 obs

○ 2017-03-28 06:48:52
● 2020-02-04 16:19:42
● 2026-03-27 16:28:02

●MXaspmx3.googlemail.com2020-02-04 → 2026-03-27 · 3 obs

○ 2017-03-28 06:48:52
● 2020-02-04 16:19:42
● 2026-03-27 16:28:02

●MXaspmx4.googlemail.com2020-02-04 → 2026-03-27 · 3 obs

○ 2017-03-28 06:48:52
● 2020-02-04 16:19:42
● 2026-03-27 16:28:02

●MXaspmx5.googlemail.com2020-02-04 → 2026-03-27 · 3 obs

○ 2017-03-28 06:48:52
● 2020-02-04 16:19:42
● 2026-03-27 16:28:02

○MXlocalhost2017-03-28 → 2017-03-28 · 3 obs

● 2017-03-28 06:48:52
○ 2020-02-04 16:19:42
○ 2026-03-27 16:28:02

●A121.254.129.972020-02-04 → 2026-03-27 · 3 obs

○ 2017-03-28 06:48:52
● 2020-02-04 16:19:42
● 2026-03-27 16:28:02

○A72.52.4.1222017-03-28 → 2017-03-28 · 3 obs

● 2017-03-28 06:48:52
○ 2020-02-04 16:19:42
○ 2026-03-27 16:28:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
ctbgroup.org	alpa.m2comm.co.kr, lina.m2comm.co.kr	-

✅ Authoritative Response

Server:121.254.129.66

NS records: alpa.m2comm.co.kr, lina.m2comm.co.kr

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ctbgroup.org (unsigned zone)

⏱️ Timing

Total: 1244ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`121.254.129.97`
NS	2	`alpa.m2comm.co.kr, lina.m2comm.co.kr`
MX	7	`ASPMX4.GOOGLEMAIL.com (pri: 30), ASPMX5.GOOGLEMAIL.com (pri: 30)...`
TXT	3	`v=spf1 include:gmail.com ip4:121.254.129, ysf39ddmbb2gky99lp0m1pzrp4wd7r0m...`
SOA	1	`lina.m2comm.co.kr root.m2comm.co.kr`

Analysis

Hierarchy

ctbgroup.org is the parent of www.ctbgroup.org.

IP Addresses

ctbgroup.org resolves to a single IP address: 121.254.129.97.

Other host names, for instance www.ctbgroup.org, share IP numbers with ctbgroup.org.

Name Servers

ctbgroup.org's delegation uses two name servers, alpa.m2comm.co.kr and lina.m2comm.co.kr.

ctbgroup.org shares the same name server setup as other domains, for example neurotrauma.or.kr, kscn.or.kr, kumcim.org, sgiw.org and celp.co.kr.

ctbgroup.org at least partially shares name servers with other domains, including icjournal.org, kosp.kr, sken.kr, glonav.org and aard.or.kr.