`tb-studygroup.org`

DNSSEC	⚠️ Not signed
A	27.34.146.183^{🇯🇵 CPI-NET27.34.128.0/19 KDDI Web Communications Inc.}
		PTR	`ybxxqx183.secure.ne.jp`
NS	`ns4.cpi.ad.jp` ⭐
		A	122.200.253.232^{🇯🇵 CPI-NET122.200.224.0/19}
			PTR	`ns4.cpi.ad.jp`
NS	`ns5.cpi.ad.jp`
		A	122.200.212.132^{🇯🇵 CPI-NET122.200.192.0/19}
			PTR	`ns5.cpi.ad.jp`
MX	`vlmx-air.secure.ne.jp` ⭐
		A	111.96.116.216^{🇯🇵 KDDI111.96.0.0/16}
		A	111.96.117.216^{🇯🇵 KDDI111.96.0.0/16}
SOA	`ns4.cpi.ad.jp`hostmaster@cpi.ad.jp 2024-09-24 #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=1774613316

Subdomains

www.tb-studygroup.org

Same first word

tb-studygroup.org

DNS History

7 records (4 active, 3 former)

●NSns4.cpi.ad.jp2015-08-03 → 2026-03-27 · 2 obs

● 2015-08-03 22:04:38
● 2026-03-27 12:42:36

●NSns5.cpi.ad.jp2015-08-03 → 2026-03-27 · 2 obs

● 2015-08-03 22:04:38
● 2026-03-27 12:42:36

●MXvlmx-air.secure.ne.jp2026-03-04 → 2026-03-27 · 3 obs

○ 2019-03-21 02:44:40
● 2026-03-04 07:21:18
● 2026-03-27 12:42:36

○MXvlmx20.secure.ne.jp2015-08-03 → 2019-03-21 · 4 obs

● 2015-08-03 22:04:38
● 2019-03-21 02:44:40
○ 2026-03-04 07:21:18
○ 2026-03-27 12:42:36

○MXvlmx21.secure.ne.jp2015-08-03 → 2019-03-21 · 4 obs

● 2015-08-03 22:04:38
● 2019-03-21 02:44:40
○ 2026-03-04 07:21:18
○ 2026-03-27 12:42:36

○MXvlmx22.secure.ne.jp2015-08-03 → 2019-03-21 · 4 obs

● 2015-08-03 22:04:38
● 2019-03-21 02:44:40
○ 2026-03-04 07:21:18
○ 2026-03-27 12:42:36

●A27.34.146.1832015-08-03 → 2026-03-27 · 2 obs

● 2015-08-03 22:04:38
● 2026-03-27 12:42:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	d0.org.afilias-nst.org, b2.org.afilias-nst.org, b0.org.afilias-nst.org	-
tb-studygroup.org	ns4.cpi.ad.jp, ns5.cpi.ad.jp	-

✅ Authoritative Response

Server:122.200.212.132

NS records: ns4.cpi.ad.jp, ns5.cpi.ad.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for tb-studygroup.org (unsigned zone)

⏱️ Timing

Total: 1138ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`27.34.146.183`
NS	2	`ns5.cpi.ad.jp, ns4.cpi.ad.jp`
MX	1	`vlmx-air.secure.ne.jp (pri: 10)`
SOA	1	`ns4.cpi.ad.jp hostmaster.cpi.ad.jp`

Analysis

Hierarchy

tb-studygroup.org is parent of www.tb-studygroup.org.

IP Addresses

tb-studygroup.org points to a single IP: 27.34.146.183.

Other host names, for instance www.tb-studygroup.org, share IP numbers with tb-studygroup.org.

Name Servers

tb-studygroup.org's delegation is to two name servers ns4.cpi.ad.jp and ns5.cpi.ad.jp.

tb-studygroup.org shares the same name server configuration as other domains, such as tspi.jp, anti-age.co.jp, waterlife.ne.jp, info.kddi.jp and kakinoha.com.

tb-studygroup.org at least partially shares its name servers with other domains, for instance 157.34.27.in-addr.arpa, 243.199.158.in-addr.arpa, 168.60.150.in-addr.arpa, 156.34.27.in-addr.arpa and 129.60.150.in-addr.arpa.

these name servers are commonly used with the name servers ns0.cpi.ad.jp, ns1.cpi.ad.jp, ns2.cpi.ad.jp, ns3.cpi.ad.jp, ns6.cpi.ad.jp and ns7.cpi.ad.jp.

Host names with a single IP:

ns4.cpi.ad.jp resolves to 122.200.253.232.

ns5.cpi.ad.jp resolves to 122.200.212.132.

Mail Servers

tb-studygroup.org is served by a single mail server, vlmx-air.secure.ne.jp.

tb-studygroup.org uses the same mail server setup as other domains such as adexa.co.jp, kinki-web.com, daiwabo-holdings.com, yashima-navi.jp and rarebook-yushodo.jp.

Hostname vlmx-air.secure.ne.jp resolves to two IPs: 111.96.116.216 and 111.96.117.216.

tb-studygroup.org - robtex.com