jknowledgetutor.com - dns.ninja

`jknowledgetutor.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3035::ac43:ba4e^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:3bfb^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.59.251^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.186.78^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`max.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b84^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`max.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c184^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`max.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2184^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`max.ns.cloudflare.com`
		A	108.162.193.132^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`max.ns.cloudflare.com`
		A	172.64.33.132^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`max.ns.cloudflare.com`
		A	173.245.59.132^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`max.ns.cloudflare.com`
NS	`wally.ns.cloudflare.com`
		A	2606:4700:50::adf5:3aef^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`wally.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0ef^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`wally.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20ef^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`wally.ns.cloudflare.com`
		A	108.162.192.239^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`wally.ns.cloudflare.com`
		A	172.64.32.239^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`wally.ns.cloudflare.com`
		A	173.245.58.239^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`wally.ns.cloudflare.com`
MX	`smtp.google.com` ⭐
		A	2607:f8b0:4004:c0b::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bj-in-f27.1e100.net`
		A	2607:f8b0:4004:c17::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bl-in-f26.1e100.net`
		A	2607:f8b0:4004:c19::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bk-in-f26.1e100.net`
		A	2607:f8b0:4004:c19::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bk-in-f27.1e100.net`
		A	142.250.31.26^{🇺🇸 Google142.250.31.0/24}
			PTR	`bj-in-f26.1e100.net`
		A	142.251.16.26^{🇺🇸 Google142.251.16.0/24}
			PTR	`bl-in-f26.1e100.net`
		A	142.251.16.27^{🇺🇸 Google142.251.16.0/24}
			PTR	`bl-in-f27.1e100.net`
		A	142.251.111.26^{🇺🇸 Google142.251.111.0/24}
			PTR	`bk-in-f26.1e100.net`
		A	142.251.111.27^{🇺🇸 Google142.251.111.0/24}
			PTR	`bk-in-f27.1e100.net`
TXT	`google-site-verification=YuX8D1IFEm_4noAo-UMt6lJrIsrMU7Vc_On9FuTn-q8`
TXT	`v=spf1 include:_spf.google.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.59.251, 172.67.186.78
		IPv6 hints	2606:4700:3035::ac43:ba4e, 2606:4700:3037::6815:3bfb
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=225, name=cloudflare-ech.com
SOA	`max.ns.cloudflare.com`dns@cloudflare.com serial=2411038238

`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=1786107379

Subdomains

nrw.jknowledgetutor.com

mail.jknowledgetutor.com

Same first word

jknowledgetutor.com

DNS History

29 records (7 active, 22 former)

○NSdns1.thzhost.com2016-07-05 → 2017-02-15 · 5 obs

○ 2016-02-24 04:39:44
● 2016-07-05 02:54:00
● 2017-02-15 21:31:36
○ 2019-03-28 19:40:22
○ 2026-08-07 12:57:50

○NSdns2.thzhost.com2016-07-05 → 2017-02-15 · 5 obs

○ 2016-02-24 04:39:44
● 2016-07-05 02:54:00
● 2017-02-15 21:31:36
○ 2019-03-28 19:40:22
○ 2026-08-07 12:57:50

○NSdns3.thzhost.com2016-07-05 → 2017-02-15 · 5 obs

○ 2016-02-24 04:39:44
● 2016-07-05 02:54:00
● 2017-02-15 21:31:36
○ 2019-03-28 19:40:22
○ 2026-08-07 12:57:50

○NSdns4.thzhost.com2016-07-05 → 2017-02-15 · 5 obs

○ 2016-02-24 04:39:44
● 2016-07-05 02:54:00
● 2017-02-15 21:31:36
○ 2019-03-28 19:40:22
○ 2026-08-07 12:57:50

●NSmax.ns.cloudflare.com2019-03-28 → 2026-08-07 · 3 obs

○ 2017-02-15 21:31:36
● 2019-03-28 19:40:22
● 2026-08-07 12:57:50

○NSns1.esarnserver.com2015-07-11 → 2015-11-16 · 4 obs

● 2015-07-11 06:06:54
● 2015-11-16 01:35:54
○ 2016-02-24 04:39:44
○ 2026-08-07 12:57:50

○NSns2.esarnserver.com2015-07-11 → 2015-11-16 · 4 obs

● 2015-07-11 06:06:54
● 2015-11-16 01:35:54
○ 2016-02-24 04:39:44
○ 2026-08-07 12:57:50

○NSns3.esarnserver.com2016-02-24 → 2016-02-24 · 4 obs

○ 2015-11-16 01:35:54
● 2016-02-24 04:39:44
○ 2016-07-05 02:54:00
○ 2026-08-07 12:57:50

○NSns4.esarnserver.com2016-02-24 → 2016-02-24 · 4 obs

○ 2015-11-16 01:35:54
● 2016-02-24 04:39:44
○ 2016-07-05 02:54:00
○ 2026-08-07 12:57:50

●NSwally.ns.cloudflare.com2019-03-28 → 2026-08-07 · 3 obs

○ 2017-02-15 21:31:36
● 2019-03-28 19:40:22
● 2026-08-07 12:57:50

○MXmail.jknowledgetutor.com2015-07-11 → 2026-06-08 · 4 obs

● 2015-07-11 06:06:54
● 2026-06-08 02:17:56
○ 2026-08-03 07:13:18
○ 2026-08-07 12:57:50

●MXsmtp.google.com2026-08-03 → 2026-08-07 · 3 obs

○ 2026-06-08 02:17:56
● 2026-08-03 07:13:18
● 2026-08-07 12:57:50

○A103.58.148.762016-07-05 → 2017-02-15 · 5 obs

○ 2016-02-24 04:39:44
● 2016-07-05 02:54:00
● 2017-02-15 21:31:36
○ 2019-03-28 19:40:22
○ 2026-08-07 12:57:50

●A104.21.59.2512026-02-18 → 2026-08-07 · 9 obs

○ 2019-03-28 19:40:22
● 2026-02-18 01:34:40
● 2026-03-31 08:33:16
○ 2026-04-05 17:16:20
● 2026-05-31 14:24:02
● 2026-06-04 17:45:28
○ 2026-06-08 01:33:36
● 2026-06-08 02:17:56
● 2026-08-07 12:57:50

○A104.27.130.1592019-03-28 → 2019-03-28 · 4 obs

○ 2017-02-15 21:31:36
● 2019-03-28 19:40:22
○ 2026-02-18 01:34:40
○ 2026-08-07 12:57:50

○A104.27.131.1592019-03-28 → 2019-03-28 · 4 obs

○ 2017-02-15 21:31:36
● 2019-03-28 19:40:22
○ 2026-02-18 01:34:40
○ 2026-08-07 12:57:50

○A150.107.29.1542016-02-24 → 2016-02-24 · 4 obs

○ 2015-11-16 01:35:54
● 2016-02-24 04:39:44
○ 2016-07-05 02:54:00
○ 2026-08-07 12:57:50

●A172.67.186.782026-02-18 → 2026-08-07 · 9 obs

○A183.90.173.1312015-07-11 → 2015-11-16 · 4 obs

● 2015-07-11 06:06:54
● 2015-11-16 01:35:54
○ 2016-02-24 04:39:44
○ 2026-08-07 12:57:50

○A188.114.96.02026-04-05 → 2026-06-08 · 7 obs

○ 2026-03-31 08:33:16
● 2026-04-05 17:16:20
○ 2026-05-31 14:24:02
○ 2026-06-04 17:45:28
● 2026-06-08 01:33:36
○ 2026-06-08 02:17:56
○ 2026-08-07 12:57:50

○A188.114.97.02026-04-05 → 2026-06-08 · 7 obs

○ 2026-03-31 08:33:16
● 2026-04-05 17:16:20
○ 2026-05-31 14:24:02
○ 2026-06-04 17:45:28
● 2026-06-08 01:33:36
○ 2026-06-08 02:17:56
○ 2026-08-07 12:57:50

○A2606:4700:30::681b:829f2019-03-28 → 2019-03-28 · 4 obs

○ 2017-02-15 21:31:36
● 2019-03-28 19:40:22
○ 2026-02-18 01:34:40
○ 2026-08-07 12:57:50

○A2606:4700:30::681b:839f2019-03-28 → 2019-03-28 · 4 obs

○ 2017-02-15 21:31:36
● 2019-03-28 19:40:22
○ 2026-02-18 01:34:40
○ 2026-08-07 12:57:50

○A2606:4700:3033::ac43:ba4e2026-02-18 → 2026-06-08 · 10 obs

○A2606:4700:3035::6815:3bfb2026-02-18 → 2026-06-08 · 10 obs

●A2606:4700:3035::ac43:ba4e2026-08-03 → 2026-08-07 · 3 obs

○ 2026-06-08 02:17:56
● 2026-08-03 07:13:18
● 2026-08-07 12:57:50

●A2606:4700:3037::6815:3bfb2026-08-03 → 2026-08-07 · 3 obs

○ 2026-06-08 02:17:56
● 2026-08-03 07:13:18
● 2026-08-07 12:57:50

○A2a06:98c1:3120::2026-04-05 → 2026-06-08 · 7 obs

○ 2026-03-31 08:33:16
● 2026-04-05 17:16:20
○ 2026-05-31 14:24:02
○ 2026-06-04 17:45:28
● 2026-06-08 01:33:36
○ 2026-06-08 02:17:56
○ 2026-08-07 12:57:50

○A2a06:98c1:3121::2026-04-05 → 2026-06-08 · 7 obs

○ 2026-03-31 08:33:16
● 2026-04-05 17:16:20
○ 2026-05-31 14:24:02
○ 2026-06-04 17:45:28
● 2026-06-08 01:33:36
○ 2026-06-08 02:17:56
○ 2026-08-07 12:57:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, a.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net...	-
jknowledgetutor.com	max.ns.cloudflare.com, wally.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.132

NS records: max.ns.cloudflare.com, wally.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jknowledgetutor.com (unsigned zone)

⏱️ Timing

Total: 428ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.59.251, 172.67.186.78`
AAAA	2	`2606:4700:3037::6815:3bfb, 2606:4700:3035::ac43:ba4e`
NS	2	`max.ns.cloudflare.com, wally.ns.cloudflare.com`
MX	1	`smtp.google.com (pri: 10)`
TXT	2	`google-site-verification=YuX8D1IFEm_4noA, v=spf1 include:_spf.google.com ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`max.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (max.ns.cloudflare.com, max.ns.cloudflare.com, max.ns.cloudflare.com...)

Analysis

Hierarchy

jknowledgetutor.com serves as the parent of nrw.jknowledgetutor.com and mail.jknowledgetutor.com.

IP Addresses

jknowledgetutor.com has four IP addresses: 104.21.59.251, 172.67.186.78, 2606:4700:3035::ac43:ba4e and 2606:4700:3037::6815:3bfb.

friese-producten.nl, gztsfy.com, tayhydro.com plus two other host names have IP numbers in common with jknowledgetutor.com.

Name Servers

DNS delegation for jknowledgetutor.com points to two name servers: max.ns.cloudflare.com and wally.ns.cloudflare.com.

The name server configuration of jknowledgetutor.com is shared with other domains, for instance zlosniki.pl, agentslug.com, digitash.com and two others.

jknowledgetutor.com has at least partial name server overlap with other domains, such as mohawkvalleycarpets.com, fqbf.com.cn, tamilpedia.in and two others.

These name servers tend to appear together with the name servers clint.ns.cloudflare.com, thomas.ns.cloudflare.com and elisa.ns.cloudflare.com.

Hosts with 6 IP addresses each:

max.ns.cloudflare.com has IP addresses 108.162.193.132, 172.64.33.132 and 173.245.59.132, plus 3 other.

wally.ns.cloudflare.com has IP addresses 108.162.192.239, 172.64.32.239 and 173.245.58.239, plus 3 other.

Mail Servers

jknowledgetutor.com uses one mail server — smtp.google.com.

The mail server setup of jknowledgetutor.com matches that of other domains such as textor.it, lasercare.net, a1prime.com and two others.

At least some of the mail servers used by jknowledgetutor.com are shared with other domains: oketzfoundation.org, tanahair.net, bvolante.com and two others among them.

It is common to find these mail servers paired with the mail servers aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com, as well as two others.

smtp.google.com has 9 IP addresses: 142.250.31.26, 142.251.16.26, 142.251.16.27 plus 6 more.