`mail.jknowledgetutor.com`

DNSSEC	⚠️ Not signed
A	139.180.211.87^{🇸🇬 AS-VULTR139.180.208.0/20 The Constant Company, LLC 319 CLEMATIS ST Suite 900}
		PTR	`139.180.211.87.vultrusercontent.com`

`jknowledgetutor.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:ba4e^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:3bfb^{🇺🇸 Cloudflare2606:4700:3035::/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` ⭐
NS	`wally.ns.cloudflare.com`
MX	`mail.jknowledgetutor.com` ⭐
TXT	`google-site-verification=ln2ncRZqvX702aGwIoSi_ZpXhw0wPJ1LNCuXcPF4GPY`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.59.251, 172.67.186.78
		IPv6	2606:4700:3033::ac43:ba4e, 2606:4700:3035::6815:3bfb
SOA	`max.ns.cloudflare.com`dns@cloudflare.com serial=2397420595

MX for

jknowledgetutor.com

Same first word

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DNS History

5 records (1 active, 4 former)

○A103.58.148.762016-07-12 → 2016-07-12 · 4 obs

○ 2016-03-03 16:22:58
● 2016-07-12 06:26:22
○ 2026-02-18 01:34:40
○ 2026-03-25 18:00:44

●A139.180.211.872026-02-18 → 2026-03-25 · 3 obs

○ 2016-07-12 06:26:22
● 2026-02-18 01:34:40
● 2026-03-25 18:00:44

○A150.107.29.1542016-03-03 → 2016-03-03 · 4 obs

○ 2015-11-20 06:47:12
● 2016-03-03 16:22:58
○ 2016-07-12 06:26:22
○ 2026-03-25 18:00:44

○A183.90.173.1312015-07-11 → 2015-11-20 · 4 obs

● 2015-07-11 03:00:28
● 2015-11-20 06:47:12
○ 2016-03-03 16:22:58
○ 2026-03-25 18:00:44

○A45.32.104.1342026-02-18 → 2026-03-25 · 2 obs

○ 2026-02-18 01:34:40
○ 2026-03-25 18:00:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	d.gtld-servers.net, g.gtld-servers.net, e.gtld-servers.net, k.gtld-servers.net...	-
jknowledgetutor.com	max.ns.cloudflare.com, wally.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.239

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: 945ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`139.180.211.87`

📌 Glue Records Collected

Total: 12

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

Analysis

Mail Server Role

mail.jknowledgetutor.com functions as a mail server for jknowledgetutor.com.

IP Addresses

mail.jknowledgetutor.com resolves to one IP number: 139.180.211.87.

Other host names such as nrw.jknowledgetutor.com and mail.nrw.jknowledgetutor.com share IP numbers with mail.jknowledgetutor.com.

mail.jknowledgetutor.com - robtex.com