`biz-itengineer.com`

DNSSEC	⚠️ Not signed
A	160.16.66.187^{🇯🇵 SAKURA-B160.16.0.0/17 SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
		PTR	`tk2-209-14183.vs.sakura.ne.jp`
NS	`master.dns.ne.jp` ⭐
		A	210.224.172.18^{🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan}
			PTR	`master.dns.ne.jp`
NS	`ns1.dns.ne.jp`
		A	61.211.236.1^{🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan}
			PTR	`ns1.dns.ne.jp`
NS	`ns2.dns.ne.jp`
		A	133.167.21.1^{🇯🇵 SAKURA-C133.167.21.0/24 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan}
			PTR	`ns2.dns.ne.jp`
MX	`biz-itengineer.com` ⭐
		A	160.16.66.187^{🇯🇵 SAKURA-B160.16.0.0/17 SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
			PTR	`tk2-209-14183.vs.sakura.ne.jp`
SOA	`master.dns.ne.jp`tech@sakura.ad.jp 2017-06-13 #0

`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=1778338381

MX for

biz-itengineer.com

Same first word

biz-itengineer.com

DNS History

7 records (5 active, 2 former)

●NSmaster.dns.ne.jp2015-05-24 → 2026-05-09 · 2 obs

● 2015-05-24 12:42:24
● 2026-05-09 15:18:42

●NSns1.dns.ne.jp2015-05-24 → 2026-05-09 · 2 obs

● 2015-05-24 12:42:24
● 2026-05-09 15:18:42

●NSns2.dns.ne.jp2015-05-24 → 2026-05-09 · 2 obs

● 2015-05-24 12:42:24
● 2026-05-09 15:18:42

●MXbiz-itengineer.com2015-05-24 → 2026-05-09 · 2 obs

● 2015-05-24 12:42:24
● 2026-05-09 15:18:42

○A133.242.185.1542015-05-24 → 2016-03-30 · 4 obs

● 2015-05-24 12:42:24
● 2016-03-30 11:06:18
○ 2016-09-12 22:49:44
○ 2026-05-09 15:18:42

○A153.126.158.772016-09-12 → 2017-04-07 · 5 obs

○ 2016-03-30 11:06:18
● 2016-09-12 22:49:44
● 2017-04-07 04:57:14
○ 2026-04-09 20:30:54
○ 2026-05-09 15:18:42

●A160.16.66.1872026-04-09 → 2026-05-09 · 3 obs

○ 2017-04-07 04:57:14
● 2026-04-09 20:30:54
● 2026-05-09 15:18:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	j.gtld-servers.net, l.gtld-servers.net, k.gtld-servers.net, h.gtld-servers.net...	-
biz-itengineer.com	ns1.dns.ne.jp, ns2.dns.ne.jp	-

✅ Authoritative Response

Server:133.167.21.1

NS records: ns1.dns.ne.jp, ns2.dns.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for biz-itengineer.com (unsigned zone)

⏱️ Timing

Total: 934ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`160.16.66.187`
NS	2	`ns1.dns.ne.jp, ns2.dns.ne.jp`
MX	1	`biz-itengineer.com (pri: 10)`
SOA	1	`master.dns.ne.jp tech.sakura.ad.jp`

Analysis

Mail Server Role

biz-itengineer.com serves as the mail server for biz-itengineer.com.

IP Addresses

biz-itengineer.com points to a single IP number: 160.16.66.187.

Other host names, for instance tk2-209-14183.vs.sakura.ne.jp, share IP numbers with biz-itengineer.com.

Name Servers

The domain biz-itengineer.com is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.

biz-itengineer.com shares name servers with other domains at least partially, for instance pdpda.sakura.ne.jp, setagaya-dm.clinic, yellgakuin4401.sakura.ne.jp, djiro.com and dothtml5.com.

Host names with a single IP number:

master.dns.ne.jp points to 210.224.172.18.

ns1.dns.ne.jp points to 61.211.236.1.

ns2.dns.ne.jp points to 133.167.21.1.

Mail Servers

A single mail server handles biz-itengineer.com and biz-itengineer.com.

Host name biz-itengineer.com resolves to IP 160.16.66.187.

biz-itengineer.com - robtex.com