`denkosya.com`

DNSSEC	⚠️ Not signed
A	57.181.234.18^{🇯🇵 Amazon57.180.0.0/14 EC2}
		PTR	`ec2-57-181-234-18.ap-northeast-1.compute.amazonaws.com`
NS	`ns.denkosya.com` ⭐ ⚠️ Not in parent delegation
		A	57.181.234.18^{🇯🇵 Amazon57.180.0.0/14 EC2}
			PTR	`ec2-57-181-234-18.ap-northeast-1.compute.amazonaws.com`
NS	`ns101.mail-office.biz` ⚠️ Not in zone NS records
		A	57.181.234.18^{🇯🇵 Amazon57.180.0.0/14 EC2}
			PTR	`ec2-57-181-234-18.ap-northeast-1.compute.amazonaws.com`
NS	`ns101.mail-office.net` ⚠️ Not in zone NS records
		A	57.181.234.18^{🇯🇵 Amazon57.180.0.0/14 EC2}
			PTR	`ec2-57-181-234-18.ap-northeast-1.compute.amazonaws.com`
MX	`mail.denkosya.com` ⭐
		A	57.181.234.18^{🇯🇵 Amazon57.180.0.0/14 EC2}
			PTR	`ec2-57-181-234-18.ap-northeast-1.compute.amazonaws.com`
TXT	`v=spf1 +a +mx +ip4:57.181.234.18 -all`
SOA	`ns.denkosya.com`info@denkosya.com 2026-03-07 #16

`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=1774529672

Subdomains

ns.denkosya.com

mail.denkosya.com

Same first word

denkosya.com

denkosya.net

Similar names

asyndeko.org

kodensya.com

asyndeko.biz

asyndeko.com

okaysend.com

okaysend.duckdns.org

kodensya.net

keydonsa.com

densyoka.jp

asyndeko.com.cn

asyndeko.net

DNS History

7 records (5 active, 2 former)

●NSns.denkosya.com2015-06-19 → 2026-03-26 · 2 obs

● 2015-06-19 08:52:22
● 2026-03-26 13:11:08

●NSns101.mail-office.biz2026-03-24 → 2026-03-26 · 3 obs

○ 2015-06-19 08:52:22
● 2026-03-24 04:02:46
● 2026-03-26 13:11:08

●NSns101.mail-office.net2026-03-24 → 2026-03-26 · 3 obs

○ 2015-06-19 08:52:22
● 2026-03-24 04:02:46
● 2026-03-26 13:11:08

●MXmail.denkosya.com2015-06-19 → 2026-03-26 · 2 obs

● 2015-06-19 08:52:22
● 2026-03-26 13:11:08

○A157.7.163.122015-10-28 → 2018-07-10 · 5 obs

○ 2015-06-19 08:52:22
● 2015-10-28 07:41:34
● 2018-07-10 19:11:20
○ 2026-03-24 04:02:46
○ 2026-03-26 13:11:08

○A157.7.166.1032015-06-19 → 2015-06-19 · 3 obs

● 2015-06-19 08:52:22
○ 2015-10-28 07:41:34
○ 2026-03-26 13:11:08

●A57.181.234.182026-03-24 → 2026-03-26 · 3 obs

○ 2018-07-10 19:11:20
● 2026-03-24 04:02:46
● 2026-03-26 13:11:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
denkosya.com	ns101.mail-office.net, ns101.mail-office.biz	-

✅ Authoritative Response

Server:57.181.234.18

NS records: ns101.mail-office.net, ns101.mail-office.biz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for denkosya.com (unsigned zone)

⏱️ Timing

Total: 813ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`57.181.234.18`
NS	1	`ns.denkosya.com`
MX	1	`mail.denkosya.com (pri: 10)`
TXT	1	`v=spf1 +a +mx +ip4:57.181.234.18 -all`
SOA	1	`ns.denkosya.com info.denkosya.com`

Analysis

Hierarchy

denkosya.com is a parent of ns.denkosya.com and mail.denkosya.com.

IP Addresses

denkosya.com resolves to one IP number: 57.181.234.18.

Other host names, for instance ns004.mail-office.biz, ns2.e-cf.jp, mail.dancing.co.jp, ns1.onoden.net and ns2.adken.jp share IP numbers with denkosya.com.

Name Servers

denkosya.com is delegated to three name servers: ns101.mail-office.biz, ns.denkosya.com and ns101.mail-office.net.

denkosya.com at least partially shares name servers with other domains, including global-engineer.co.jp, ikujien.jp, office-taka.com, kataoka-bld.com and kousyou.or.jp.

These name servers are commonly used with ns.global-engineer.co.jp, ns1.ikujien.jp, ns2.ikujien.jp, ns.ikujien.jp, ns1.office-taka.com, ns2.office-taka.com, ns.kataoka-bld.com, ns1.kousyou.or.jp, ns2.kousyou.or.jp and ns2.onoden.net.

Host names with a single IP

ns101.mail-office.biz points to: 57.181.234.18

ns.denkosya.com points to: 57.181.234.18

ns101.mail-office.net points to: 57.181.234.18

Host names pointing to 57.181.234.18: ns101.mail-office.biz, ns.denkosya.com and ns101.mail-office.net

Mail Servers

A single mail server handles denkosya.com, mail.denkosya.com.

Host name mail.denkosya.com resolves to a single IP: 57.181.234.18.

denkosya.com - robtex.com

denkosya.com

com