concise-courses.com - dns.ninja

`concise-courses.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:80b9^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:234^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.2.52^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.128.185^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`sri.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3bea^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sri.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1ea^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`sri.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21ea^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`sri.ns.cloudflare.com`
		A	108.162.193.234^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sri.ns.cloudflare.com`
		A	172.64.33.234^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sri.ns.cloudflare.com`
		A	173.245.59.234^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sri.ns.cloudflare.com`
NS	`tani.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ae0^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0e0^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`tani.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20e0^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`tani.ns.cloudflare.com`
		A	108.162.192.224^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
		A	172.64.32.224^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
		A	173.245.58.224^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
TXT	`google-site-verification=WdLB9G4RCOp77P0npYHXW1NRtv7qJ7d3VqBOB4YvIcw`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.2.52, 172.67.128.185
		IPv6 hints	2606:4700:3033::ac43:80b9, 2606:4700:3035::6815:234
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=204, name=cloudflare-ech.com
SOA	`sri.ns.cloudflare.com`dns@cloudflare.com serial=2409079070

`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=1786448314

Same first word

concise-courses.com

DNS History

22 records (6 active, 16 former)

○NS10.sucuridns.com2016-04-23 → 2017-02-17 · 5 obs

○ 2016-01-26 08:57:04
● 2016-04-23 17:52:08
● 2017-02-17 01:09:22
○ 2017-09-23 14:26:16
○ 2026-08-11 11:46:34

○NS11.sucuridns.com2016-04-23 → 2017-02-17 · 5 obs

○ 2016-01-26 08:57:04
● 2016-04-23 17:52:08
● 2017-02-17 01:09:22
○ 2017-09-23 14:26:16
○ 2026-08-11 11:46:34

○NS14.sucuridns.com2016-04-23 → 2017-02-17 · 5 obs

○ 2016-01-26 08:57:04
● 2016-04-23 17:52:08
● 2017-02-17 01:09:22
○ 2017-09-23 14:26:16
○ 2026-08-11 11:46:34

○NS15.sucuridns.com2016-04-23 → 2017-02-17 · 5 obs

○ 2016-01-26 08:57:04
● 2016-04-23 17:52:08
● 2017-02-17 01:09:22
○ 2017-09-23 14:26:16
○ 2026-08-11 11:46:34

○NS17.sucuridns.com2016-04-23 → 2017-02-17 · 5 obs

○ 2016-01-26 08:57:04
● 2016-04-23 17:52:08
● 2017-02-17 01:09:22
○ 2017-09-23 14:26:16
○ 2026-08-11 11:46:34

○NSns-116.awsdns-14.com2015-07-06 → 2017-09-23 · 7 obs

● 2015-07-06 07:53:52
● 2016-01-26 08:57:04
○ 2016-04-23 17:52:08
○ 2017-02-17 01:09:22
● 2017-09-23 14:26:16
○ 2026-02-17 20:39:54
○ 2026-08-11 11:46:34

○NSns-1419.awsdns-49.org2015-07-06 → 2017-09-23 · 7 obs

● 2015-07-06 07:53:52
● 2016-01-26 08:57:04
○ 2016-04-23 17:52:08
○ 2017-02-17 01:09:22
● 2017-09-23 14:26:16
○ 2026-02-17 20:39:54
○ 2026-08-11 11:46:34

○NSns-1835.awsdns-37.co.uk2015-07-06 → 2017-09-23 · 7 obs

● 2015-07-06 07:53:52
● 2016-01-26 08:57:04
○ 2016-04-23 17:52:08
○ 2017-02-17 01:09:22
● 2017-09-23 14:26:16
○ 2026-02-17 20:39:54
○ 2026-08-11 11:46:34

○NSns-653.awsdns-17.net2015-07-06 → 2017-09-23 · 7 obs

● 2015-07-06 07:53:52
● 2016-01-26 08:57:04
○ 2016-04-23 17:52:08
○ 2017-02-17 01:09:22
● 2017-09-23 14:26:16
○ 2026-02-17 20:39:54
○ 2026-08-11 11:46:34

●NSsri.ns.cloudflare.com2026-02-17 → 2026-08-11 · 3 obs

○ 2017-09-23 14:26:16
● 2026-02-17 20:39:54
● 2026-08-11 11:46:34

●NStani.ns.cloudflare.com2026-02-17 → 2026-08-11 · 3 obs

○ 2017-09-23 14:26:16
● 2026-02-17 20:39:54
● 2026-08-11 11:46:34

○MXmail.concise-courses.com2017-02-17 → 2017-09-23 · 5 obs

○ 2016-04-23 17:52:08
● 2017-02-17 01:09:22
● 2017-09-23 14:26:16
○ 2026-02-17 20:39:54
○ 2026-08-11 11:46:34

○MXmx.zohomail.com2015-07-06 → 2016-01-26 · 4 obs

● 2015-07-06 07:53:52
● 2016-01-26 08:57:04
○ 2016-04-23 17:52:08
○ 2026-08-11 11:46:34

○MXmx2.zohomail.com2015-07-06 → 2016-01-26 · 4 obs

● 2015-07-06 07:53:52
● 2016-01-26 08:57:04
○ 2016-04-23 17:52:08
○ 2026-08-11 11:46:34

●A104.21.2.522026-02-17 → 2026-08-11 · 3 obs

○ 2017-09-23 14:26:16
● 2026-02-17 20:39:54
● 2026-08-11 11:46:34

●A172.67.128.1852026-02-17 → 2026-08-11 · 3 obs

○ 2017-09-23 14:26:16
● 2026-02-17 20:39:54
● 2026-08-11 11:46:34

○A192.124.249.122016-04-23 → 2017-02-17 · 5 obs

○ 2016-01-26 08:57:04
● 2016-04-23 17:52:08
● 2017-02-17 01:09:22
○ 2017-09-23 14:26:16
○ 2026-08-11 11:46:34

○A216.86.156.1412017-09-23 → 2017-09-23 · 4 obs

○ 2017-02-17 01:09:22
● 2017-09-23 14:26:16
○ 2026-02-17 20:39:54
○ 2026-08-11 11:46:34

○A2606:4700:3030::6815:2342026-02-17 → 2026-06-15 · 5 obs

○ 2017-09-23 14:26:16
● 2026-02-17 20:39:54
● 2026-06-15 20:51:18
○ 2026-07-08 06:26:26
○ 2026-08-11 11:46:34

●A2606:4700:3033::ac43:80b92026-02-17 → 2026-08-11 · 3 obs

○ 2017-09-23 14:26:16
● 2026-02-17 20:39:54
● 2026-08-11 11:46:34

●A2606:4700:3035::6815:2342026-07-08 → 2026-08-11 · 3 obs

○ 2026-06-15 20:51:18
● 2026-07-08 06:26:26
● 2026-08-11 11:46:34

○A54.244.225.1182015-07-06 → 2016-01-26 · 4 obs

● 2015-07-06 07:53:52
● 2016-01-26 08:57:04
○ 2016-04-23 17:52:08
○ 2026-08-11 11:46:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
concise-courses.com	tani.ns.cloudflare.com, sri.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.234

NS records: tani.ns.cloudflare.com, sri.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for concise-courses.com (unsigned zone)

⏱️ Timing

Total: 130ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.128.185, 104.21.2.52`
AAAA	2	`2606:4700:3033::ac43:80b9, 2606:4700:3035::6815:234`
NS	2	`sri.ns.cloudflare.com, tani.ns.cloudflare.com`
TXT	1	`google-site-verification=WdLB9G4RCOp77P0`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`sri.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

concise-courses.com points to the four IP addresses 104.21.2.52, 172.67.128.185, 2606:4700:3033::ac43:80b9 and 2606:4700:3035::6815:234.

Among the host names that share IP numbers with concise-courses.com are mail.tom-net.eu, affectionatelypets.com, adheseal.com and two others.

Name Servers

concise-courses.com is delegated to two name servers: sri.ns.cloudflare.com and tani.ns.cloudflare.com.

concise-courses.com has the same name server delegation as a number of other domains, such as thappening.com, iancarina.net, dhempe.com and two more.

There is at least partial name server overlap between concise-courses.com and other domains — 16avgg.com, getproper.com, foxkarthick.com and two more among them.

The name servers paige.ns.cloudflare.com, rita.ns.cloudflare.com and ara.ns.cloudflare.com are often found in combination with these name servers.

Host names resolving to 6 IP numbers:

sri.ns.cloudflare.com resolves to 108.162.193.234, 172.64.33.234, 173.245.59.234 and 3 other IP addresses.

tani.ns.cloudflare.com resolves to 108.162.192.224, 172.64.32.224, 173.245.58.224 and 3 other IP addresses.