techknowledge.co.jp - dns.ninja

`techknowledge.co.jp`

DNSSEC	⚠️ Not signed
A	13.114.105.198^{🇯🇵 Amazon13.112.0.0/14 EC2 NRT prefix}
		PTR	`mail2.techknowledge.co.jp`
NS	`01.dnsv.jp` ⭐
		A	2400:8500:3300::53^{🇯🇵 GMO-DNS2400:8500:3300::/48 GMO Internet,inc.}
			PTR	`01.dnsv.jp`
		A	157.7.32.53^{🇯🇵 GMO-DNS157.7.32.0/24 GMO Internet,inc. Network-Team.}
			PTR	`01.dnsv.jp`
NS	`02.dnsv.jp`
		A	157.7.33.53^{🇯🇵 GMO-DNS157.7.33.0/24 GMO Internet,inc. Network-Team.}
			PTR	`02.dnsv.jp`
NS	`03.dnsv.jp`
		A	2400:8500:3000::53^{🇯🇵 GMO-DNS2400:8500:3000::/48 GMO Internet,inc.}
			PTR	`03.dnsv.jp`
		A	157.7.34.53^{🇯🇵 GMO-DNS157.7.34.0/24 GMO Internet,inc. Network-Team.}
			PTR	`03.dnsv.jp`
NS	`04.dnsv.jp`
		A	2400:8500:3fff::53^{🇯🇵 GMO-DNS2400:8500:3fff::/48 GMO Internet,inc.}
			PTR	`04.dnsv.jp`
		A	157.7.35.53^{🇯🇵 GMO-DNS157.7.35.0/24 GMO Internet,inc. Network-Team.}
			PTR	`04.dnsv.jp`
MX	`mail4.techknowledge.co.jp` ⭐
		A	160.16.231.181^{🇯🇵 SAKURA-B160.16.128.0/17 (TOKYO) SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
			PTR	`mail4.techknowledge.co.jp`
TXT	`v=spf1 a:mail4.techknowledge.co.jp ip4:160.16.231.181 include:_spf.google.com...`
SOA	`01.dnsv.jp`hostmaster@dnsv.jp serial=1776239744

`co.jp`

	DNSSEC	⚠️ Not signed
	TXT	`co.jp.`

WOT: SAFE (58/100)

Subdomains

www.techknowledge.co.jp

mail4.techknowledge.co.jp

Same first word

Similar names

knowledgetech.com

knowledgetech.org

DNS History

11 records (6 active, 5 former)

●NS01.dnsv.jp2026-02-16 → 2026-08-10 · 3 obs

○ 2017-02-12 15:37:00
● 2026-02-16 17:06:04
● 2026-08-10 22:56:22

●NS02.dnsv.jp2026-02-16 → 2026-08-10 · 3 obs

○ 2017-02-12 15:37:00
● 2026-02-16 17:06:04
● 2026-08-10 22:56:22

●NS03.dnsv.jp2026-02-16 → 2026-08-10 · 3 obs

○ 2017-02-12 15:37:00
● 2026-02-16 17:06:04
● 2026-08-10 22:56:22

●NS04.dnsv.jp2026-02-16 → 2026-08-10 · 3 obs

○ 2017-02-12 15:37:00
● 2026-02-16 17:06:04
● 2026-08-10 22:56:22

○NS163.139.230.1682016-06-20 → 2017-02-12 · 5 obs

○ 2016-02-10 21:20:24
● 2016-06-20 15:56:22
● 2017-02-12 15:37:00
○ 2026-02-16 17:06:04
○ 2026-08-10 22:56:22

○NS2nd.dnsv.jp2016-06-20 → 2017-02-12 · 5 obs

○ 2016-02-10 21:20:24
● 2016-06-20 15:56:22
● 2017-02-12 15:37:00
○ 2026-02-16 17:06:04
○ 2026-08-10 22:56:22

○NSgate.techknowledge.co.jp2008-03-10 → 2017-02-12 · 4 obs

● 2008-03-10 17:50:30
● 2017-02-12 15:37:00
○ 2026-02-16 17:06:04
○ 2026-08-10 22:56:22

○NSns1.bit-drive.ne.jp2008-03-10 → 2016-02-10 · 4 obs

● 2008-03-10 17:50:30
● 2016-02-10 21:20:24
○ 2016-06-20 15:56:22
○ 2026-08-10 22:56:22

●MXmail4.techknowledge.co.jp2026-02-16 → 2026-08-10 · 3 obs

○ 2017-02-12 15:37:00
● 2026-02-16 17:06:04
● 2026-08-10 22:56:22

○MXstern.techknowledge.co.jp2008-03-10 → 2017-02-12 · 4 obs

● 2008-03-10 17:50:30
● 2017-02-12 15:37:00
○ 2026-02-16 17:06:04
○ 2026-08-10 22:56:22

●A13.114.105.1982026-02-16 → 2026-08-10 · 2 obs

● 2026-02-16 17:06:04
● 2026-08-10 22:56:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
techknowledge.co.jp	03.dnsv.jp, 02.dnsv.jp, 01.dnsv.jp, 04.dnsv.jp	7 records

✅ Authoritative Response

Server:157.7.35.53

NS records: 03.dnsv.jp, 02.dnsv.jp, 01.dnsv.jp, 04.dnsv.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for techknowledge.co.jp (unsigned zone)

⏱️ Timing

Total: 777ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`13.114.105.198`
NS	4	`01.dnsv.jp, 02.dnsv.jp...`
MX	1	`mail4.techknowledge.co.jp (pri: 10)`
TXT	1	`v=spf1 a:mail4.techknowledge.co.jp ip4:1`
SOA	1	`01.dnsv.jp hostmaster.dnsv.jp`

📌 Glue Records Collected

Total: 7

Out-of-bailiwick: 7 (04.dnsv.jp, 03.dnsv.jp, 02.dnsv.jp...)

Analysis

Hierarchy

www.techknowledge.co.jp and mail4.techknowledge.co.jp are both subdomains of techknowledge.co.jp.

IP Addresses

techknowledge.co.jp resolves to one IP address: 13.114.105.198.

There are other host names — www.techknowledge.co.jp among them — that share IP numbers with techknowledge.co.jp.

Name Servers

The authoritative name servers for techknowledge.co.jp are 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp and 04.dnsv.jp.

The name servers of techknowledge.co.jp overlap at least partially with those of other domains — among them samudari.com, hyrdaruzxpnew4af.online, teiden.net and two more.

Hostnames that resolve to two IP addresses:

01.dnsv.jp has two IP addresses: 157.7.32.53 and 2400:8500:3300::53.

03.dnsv.jp has two IP addresses: 157.7.34.53 and 2400:8500:3000::53.

04.dnsv.jp has two IP addresses: 157.7.35.53 and 2400:8500:3fff::53.

Hosts with just one IP address:

02.dnsv.jp directs to 157.7.33.53.

Mail Servers

Mail for techknowledge.co.jp is handled by a single mail server, mail4.techknowledge.co.jp.

mail4.techknowledge.co.jp has exactly one IP number: 160.16.231.181.