`cycu.jp`

DNSSEC	⚠️ Not signed
NS	`ns3.sphere.ad.jp` ⚠️ Not in zone NS records
		A	202.239.113.22^{🇯🇵 InfoSphere202.239.64.0/18 INFOSPHERE}
			PTR	`ns3.sphere.ad.jp`
NS	`ns4.sphere.ad.jp` ⚠️ Not in zone NS records
		A	202.239.113.30^{🇯🇵 InfoSphere202.239.64.0/18 INFOSPHERE}
			PTR	`ns4.sphere.ad.jp`

`jp`

	DNSSEC	🔒 Signed (DS record present)
	NS	`z.dns.jp` ⭐
	NS	`a.dns.jp`
	NS	`b.dns.jp`
	NS	`c.dns.jp`
	NS	`d.dns.jp`
	NS	`e.dns.jp`
	NS	`f.dns.jp`
	NS	`g.dns.jp`
	NS	`h.dns.jp`
	SOA	`z.dns.jp`root@dns.jp serial=1776036603

Previously MX for

cycu.jp

Same first word

cycu.org

cycu.com

cycu.org.tw

cycu.net

cycu.edu.tw

cycu.jp

Similar names

ccuy.org

ucyc.net

ucyc.com

uycc.org

yucc.org.tw

ccyu.net

uccy.com

cuyc.com

yucc.com.cn

ccyu.com

cuyc.org

cucy.com

ucyc.org

yucc.org.uk

yccu.com

cucy.org

cucy.ru

cucy.net

cuyc.cn

cuyc.info

cuyc.org.uk

yccu.org

yucc.org

ucyc.ru

yucc.com

cucy.de

cuyc.de

ccyu.com.tw

uycc.com

DNS History

4 records (2 active, 2 former)

●NSns3.sphere.ad.jp2026-02-24 → 2026-04-12 · 2 obs

● 2026-02-24 08:56:50
● 2026-04-12 23:54:06

●NSns4.sphere.ad.jp2026-02-24 → 2026-04-12 · 2 obs

● 2026-02-24 08:56:50
● 2026-04-12 23:54:06

○MXcycu.jp2026-02-24 → 2026-04-12 · 2 obs

○ 2026-02-24 08:56:50
○ 2026-04-12 23:54:06

○A119.245.215.1292026-02-24 → 2026-04-12 · 2 obs

○ 2026-02-24 08:56:50
○ 2026-04-12 23:54:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	b.dns.jp, f.dns.jp, a.dns.jp, g.dns.jp...	-
cycu.jp	ns3.sphere.ad.jp, ns4.sphere.ad.jp	-

✅ Authoritative Response

Server:202.239.113.22

NS records: ns3.sphere.ad.jp, ns4.sphere.ad.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cycu.jp (unsigned zone)

⏱️ Timing

Total: 1609ms | Queries: -

📄 Records

Type	Count	Sample Data

Analysis

Name Servers

cycu.jp is delegated to two name servers ns3.sphere.ad.jp and ns4.sphere.ad.jp.

cycu.jp shares the same name server setup as other domains, for instance f-kobunshi.co.jp, takasago.co.jp, digiplan.jp, zjkcbt00.on.arena.ne.jp and inada-sp.com.

cycu.jp at least partially shares name servers with other domains, for instance mba.co.jp.

Host names with one IP number:

ns3.sphere.ad.jp points to 202.239.113.22

ns4.sphere.ad.jp points to 202.239.113.30

cycu.jp - robtex.com

cycu.jp

jp