nknow.com - dns.ninja

`nknow.com`

DNSSEC	⚠️ Not signed
A	119.245.207.112^{🇯🇵 InfoSphere119.245.0.0/16 INFOSPHERE}
		PTR	`nknow.com`
NS	`skydns99.otsuka-office365.jp` ⭐
		A	157.205.203.139^{🇯🇵 AICS157.205.0.0/16 PACNET (proxy-registered route object)}
			PTR	`skymst11.otsuka-office365.jp`
NS	`skydns11.otsuka-office365.jp`
		A	157.205.203.141^{🇯🇵 AICS157.205.0.0/16 PACNET (proxy-registered route object)}
			PTR	`skydns11.otsuka-office365.jp`
NS	`skydns12.otsuka-office365.jp`
		A	157.205.160.35^{🇯🇵 AICS157.205.0.0/16 PACNET (proxy-registered route object)}
			PTR	`skydns12.otsuka-office365.jp`
NS	`skydns13.otsuka-office365.jp`
		A	157.205.160.51^{🇯🇵 AICS157.205.0.0/16 PACNET (proxy-registered route object)}
			PTR	`skydns13.otsuka-office365.jp`
MX	`nknow-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:cc1a::^{🇯🇵 Microsoft2a01:111:f000::/36}
			PTR	`mail-tycp286cu02600.inbound.protection.outlook.com`
		A	2a01:111:f403:cc1a::1^{🇯🇵 Microsoft2a01:111:f000::/36}
			PTR	`mail-ty3p286cu00101.inbound.protection.outlook.com`
		A	2a01:111:f403:cc1a::2^{🇯🇵 Microsoft2a01:111:f000::/36}
			PTR	`mail-tyvp286cu00302.inbound.protection.outlook.com`
		A	2a01:111:f403:cc1f::1^{🇯🇵 Microsoft2a01:111:f000::/36}
			PTR	`mail-os0p286cu01201.inbound.protection.outlook.com`
		A	52.101.124.0^{🇯🇵 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-tycp286cu02600.inbound.protection.outlook.com`
		A	52.101.124.6^{🇯🇵 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-tyvp286cu00206.inbound.protection.outlook.com`
		A	52.101.157.10^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-os0p286cu01302.inbound.protection.outlook.com`
		A	52.101.157.40^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-os9p286cu00100.inbound.protection.outlook.com`
TXT	`apple-domain-verification=7n8YLKoaBbSFukyT`
TXT	`v=spf1 include:spf.spcloud.jp include:spf.protection.outlook.com include:fmx....`
TXT	`MS=ms36410876`
SOA	`skydns99.otsuka-office365.jp`hostmaster@otsuka-office365.jp 2026-08-06 #1

`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=1785980189

PTR for

112.207.245.119.in-addr.arpa

Previously MX for

nknow.com

Same first word

nknow.com

Similar names

known.cn

known.com.cn

known.de

nownk.com

known.net

known.systems

kwonn.com

known.com

known.as

known.com.au

known.nl

known.ru

known.network

known.host

known.me

known.eu

known.se

known.dk

known.us

known.life

known.ch

known.tv

knnow.com

known.mba

known.computer

known.in

known.news

known.co

known.com.ph

known.org

wkonn.com

known.it

DNS History

9 records (6 active, 3 former)

○NSns3.sphere.ad.jp2015-07-11 → 2018-11-18 · 4 obs

● 2015-07-11 03:30:44
● 2018-11-18 05:37:50
○ 2026-04-09 16:50:04
○ 2026-08-06 01:48:24

○NSns4.sphere.ad.jp2015-07-11 → 2018-11-18 · 4 obs

● 2015-07-11 03:30:44
● 2018-11-18 05:37:50
○ 2026-04-09 16:50:04
○ 2026-08-06 01:48:24

●NSskydns11.otsuka-office365.jp2026-04-09 → 2026-08-06 · 3 obs

○ 2018-11-18 05:37:50
● 2026-04-09 16:50:04
● 2026-08-06 01:48:24

●NSskydns12.otsuka-office365.jp2026-04-09 → 2026-08-06 · 3 obs

○ 2018-11-18 05:37:50
● 2026-04-09 16:50:04
● 2026-08-06 01:48:24

●NSskydns13.otsuka-office365.jp2026-04-09 → 2026-08-06 · 3 obs

○ 2018-11-18 05:37:50
● 2026-04-09 16:50:04
● 2026-08-06 01:48:24

●NSskydns99.otsuka-office365.jp2026-04-09 → 2026-08-06 · 3 obs

○ 2018-11-18 05:37:50
● 2026-04-09 16:50:04
● 2026-08-06 01:48:24

●MXnknow-com.mail.protection.outlook.com2026-04-09 → 2026-08-06 · 3 obs

○ 2018-11-18 05:37:50
● 2026-04-09 16:50:04
● 2026-08-06 01:48:24

○MXnknow.com2015-07-11 → 2018-11-18 · 4 obs

● 2015-07-11 03:30:44
● 2018-11-18 05:37:50
○ 2026-04-09 16:50:04
○ 2026-08-06 01:48:24

●A119.245.207.1122015-07-11 → 2026-08-06 · 2 obs

● 2015-07-11 03:30:44
● 2026-08-06 01:48:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
nknow.com	skydns11.otsuka-office365.jp, skydns12.otsuka-office365.jp, skydns13.otsuka-office365.jp	-

✅ Authoritative Response

Server:157.205.203.141

NS records: skydns11.otsuka-office365.jp, skydns12.otsuka-office365.jp, skydns13.otsuka-office365.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for nknow.com (unsigned zone)

⏱️ Timing

Total: 1035ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`119.245.207.112`
NS	3	`skydns12.otsuka-office365.jp, skydns13.otsuka-office365.jp...`
MX	1	`nknow-com.mail.protection.outlook.com (p`
TXT	3	`MS=ms36410876, apple-domain-verification=7n8YLKoaBbSFuk...`
SOA	1	`skydns99.otsuka-office365.jp hostmaster.`

Analysis

IP Addresses

nknow.com resolves to one IP address: 119.245.207.112.

Name Servers

The authoritative name servers for nknow.com are skydns11.otsuka-office365.jp, skydns12.otsuka-office365.jp, skydns13.otsuka-office365.jp and skydns99.otsuka-office365.jp.

There is at least partial name server overlap between nknow.com and other domains — shigerubanarchitects.com, fgh.co.jp, datastadium.co.jp and two more among them.

Each of the four hosts skydns11.otsuka-office365.jp, skydns12.otsuka-office365.jp, skydns13.otsuka-office365.jp and skydns99.otsuka-office365.jp points to a single IP address — skydns11.otsuka-office365.jp points to 157.205.203.141, skydns12.otsuka-office365.jp points to 157.205.160.35, skydns13.otsuka-office365.jp points to 157.205.160.51 and skydns99.otsuka-office365.jp points to 157.205.203.139.

Mail Servers

Mail for nknow.com is handled by a single mail server, nknow-com.mail.protection.outlook.com.

nknow-com.mail.protection.outlook.com resolves to 8 IP addresses — 52.101.124.0, 52.101.124.6, 52.101.157.10 and 5 others.