executivecourses.com - dns.ninja

`executivecourses.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:35a3^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3032::ac43:d72a^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.53.163^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.215.42^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`josh.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b7e^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`josh.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c17e^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`josh.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:217e^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`josh.ns.cloudflare.com`
		A	108.162.193.126^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`josh.ns.cloudflare.com`
		A	172.64.33.126^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`josh.ns.cloudflare.com`
		A	173.245.59.126^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`josh.ns.cloudflare.com`
NS	`uma.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a92^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`uma.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c092^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`uma.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2092^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`uma.ns.cloudflare.com`
		A	108.162.192.146^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`uma.ns.cloudflare.com`
		A	172.64.32.146^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`uma.ns.cloudflare.com`
		A	173.245.58.146^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`uma.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c1d::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`ww-in-f26.1e100.net`
		A	172.253.63.27^{🇺🇸 Google172.253.63.0/24}
			PTR	`bi-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.27^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f27.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1b^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f27.1e100.net`
		A	172.253.157.27^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f27.1e100.net`
TXT	`google-site-verification=KjGcJkyaOUe7PO5Lk7uJCxMsjslhoV_oq480IrzJNYM`
TXT	`google-site-verification=m7idsytIWyjFt8tFl6rcNAHhu2MOaWRp1lOZUUpH3Ec`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.53.163, 172.67.215.42
		IPv6 hints	2606:4700:3031::6815:35a3, 2606:4700:3032::ac43:d72a
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=206, name=cloudflare-ech.com
SOA	`josh.ns.cloudflare.com`dns@cloudflare.com serial=2409130232

`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=1783954282

Same first word

executivecourses.com

DNS History

32 records (11 active, 21 former)

●NSjosh.ns.cloudflare.com2026-02-14 → 2026-07-13 · 3 obs

○ 2018-09-07 04:38:40
● 2026-02-14 16:30:26
● 2026-07-13 15:19:26

○NSns-de.1and1-dns.biz2016-02-10 → 2017-02-12 · 4 obs

● 2016-02-10 00:48:12
● 2017-02-12 17:23:36
○ 2018-09-07 04:38:40
○ 2026-07-13 15:19:26

○NSns-de.1and1-dns.com2016-02-10 → 2017-02-12 · 4 obs

● 2016-02-10 00:48:12
● 2017-02-12 17:23:36
○ 2018-09-07 04:38:40
○ 2026-07-13 15:19:26

○NSns-de.1and1-dns.de2016-02-10 → 2017-02-12 · 4 obs

● 2016-02-10 00:48:12
● 2017-02-12 17:23:36
○ 2018-09-07 04:38:40
○ 2026-07-13 15:19:26

○NSns-de.1and1-dns.org2016-02-10 → 2017-02-12 · 4 obs

● 2016-02-10 00:48:12
● 2017-02-12 17:23:36
○ 2018-09-07 04:38:40
○ 2026-07-13 15:19:26

○NSns1039.ui-dns.biz2018-09-07 → 2018-09-07 · 4 obs

○ 2017-02-12 17:23:36
● 2018-09-07 04:38:40
○ 2026-02-14 16:30:26
○ 2026-07-13 15:19:26

○NSns1039.ui-dns.com2018-09-07 → 2018-09-07 · 4 obs

○ 2017-02-12 17:23:36
● 2018-09-07 04:38:40
○ 2026-02-14 16:30:26
○ 2026-07-13 15:19:26

○NSns1039.ui-dns.de2018-09-07 → 2018-09-07 · 4 obs

○ 2017-02-12 17:23:36
● 2018-09-07 04:38:40
○ 2026-02-14 16:30:26
○ 2026-07-13 15:19:26

○NSns1039.ui-dns.org2018-09-07 → 2018-09-07 · 4 obs

○ 2017-02-12 17:23:36
● 2018-09-07 04:38:40
○ 2026-02-14 16:30:26
○ 2026-07-13 15:19:26

●NSuma.ns.cloudflare.com2026-02-14 → 2026-07-13 · 3 obs

○ 2018-09-07 04:38:40
● 2026-02-14 16:30:26
● 2026-07-13 15:19:26

●MXalt1.aspmx.l.google.com2026-02-14 → 2026-07-13 · 3 obs

○ 2018-09-07 04:38:40
● 2026-02-14 16:30:26
● 2026-07-13 15:19:26

●MXalt2.aspmx.l.google.com2026-02-14 → 2026-07-13 · 3 obs

○ 2018-09-07 04:38:40
● 2026-02-14 16:30:26
● 2026-07-13 15:19:26

●MXalt3.aspmx.l.google.com2026-02-14 → 2026-07-13 · 3 obs

○ 2018-09-07 04:38:40
● 2026-02-14 16:30:26
● 2026-07-13 15:19:26

●MXalt4.aspmx.l.google.com2026-02-14 → 2026-07-13 · 3 obs

○ 2018-09-07 04:38:40
● 2026-02-14 16:30:26
● 2026-07-13 15:19:26

●MXaspmx.l.google.com2026-02-14 → 2026-07-13 · 3 obs

○ 2018-09-07 04:38:40
● 2026-02-14 16:30:26
● 2026-07-13 15:19:26

○MXmx00.kundenserver.de2016-02-10 → 2018-09-07 · 4 obs

● 2016-02-10 00:48:12
● 2018-09-07 04:38:40
○ 2026-02-14 16:30:26
○ 2026-07-13 15:19:26

○MXmx01.kundenserver.de2016-02-10 → 2018-09-07 · 4 obs

● 2016-02-10 00:48:12
● 2018-09-07 04:38:40
○ 2026-02-14 16:30:26
○ 2026-07-13 15:19:26

●A104.21.53.1632026-02-14 → 2026-07-13 · 11 obs

○ 2018-09-07 04:38:40
● 2026-02-14 16:30:26
● 2026-02-27 18:22:54
○ 2026-03-13 01:05:36
● 2026-04-03 07:18:20
● 2026-05-21 22:47:04
○ 2026-06-14 21:19:02
● 2026-07-01 22:29:56
○ 2026-07-04 18:53:54
● 2026-07-09 15:03:52
● 2026-07-13 15:19:26

●A172.67.215.422026-02-14 → 2026-07-13 · 11 obs

○A188.114.96.02026-03-13 → 2026-07-04 · 9 obs

○ 2026-02-27 18:22:54
● 2026-03-13 01:05:36
○ 2026-04-03 07:18:20
○ 2026-05-21 22:47:04
● 2026-06-14 21:19:02
○ 2026-07-01 22:29:56
● 2026-07-04 18:53:54
○ 2026-07-09 15:03:52
○ 2026-07-13 15:19:26

○A188.114.97.02026-03-13 → 2026-07-04 · 9 obs

○A2001:8d8:1001:20aa:26b4:2494:ac12:8042017-02-12 → 2018-09-07 · 5 obs

○ 2016-06-24 17:25:34
● 2017-02-12 17:23:36
● 2018-09-07 04:38:40
○ 2026-02-14 16:30:26
○ 2026-07-13 15:19:26

○A2001:8d8:1001:20aa:efd0:2cbf:43a0:28132016-02-10 → 2016-06-24 · 5 obs

○ 2015-07-16 01:15:54
● 2016-02-10 00:48:12
● 2016-06-24 17:25:34
○ 2017-02-12 17:23:36
○ 2026-07-13 15:19:26

○A217.160.122.1822017-02-12 → 2018-09-07 · 5 obs

○ 2016-06-24 17:25:34
● 2017-02-12 17:23:36
● 2018-09-07 04:38:40
○ 2026-02-14 16:30:26
○ 2026-07-13 15:19:26

○A217.160.169.852016-02-10 → 2016-06-24 · 5 obs

○ 2015-07-16 01:15:54
● 2016-02-10 00:48:12
● 2016-06-24 17:25:34
○ 2017-02-12 17:23:36
○ 2026-07-13 15:19:26

●A2606:4700:3031::6815:35a32026-07-01 → 2026-07-13 · 5 obs

○ 2026-06-14 21:19:02
● 2026-07-01 22:29:56
○ 2026-07-04 18:53:54
● 2026-07-09 15:03:52
● 2026-07-13 15:19:26

○A2606:4700:3031::ac43:d72a2026-02-14 → 2026-05-21 · 8 obs

○ 2018-09-07 04:38:40
● 2026-02-14 16:30:26
● 2026-02-27 18:22:54
○ 2026-03-13 01:05:36
● 2026-04-03 07:18:20
● 2026-05-21 22:47:04
○ 2026-06-14 21:19:02
○ 2026-07-13 15:19:26

●A2606:4700:3032::ac43:d72a2026-07-01 → 2026-07-13 · 5 obs

○ 2026-06-14 21:19:02
● 2026-07-01 22:29:56
○ 2026-07-04 18:53:54
● 2026-07-09 15:03:52
● 2026-07-13 15:19:26

○A2606:4700:3037::6815:35a32026-02-14 → 2026-05-21 · 8 obs

○ 2018-09-07 04:38:40
● 2026-02-14 16:30:26
● 2026-02-27 18:22:54
○ 2026-03-13 01:05:36
● 2026-04-03 07:18:20
● 2026-05-21 22:47:04
○ 2026-06-14 21:19:02
○ 2026-07-13 15:19:26

○A2a06:98c1:3120::2026-03-13 → 2026-07-04 · 9 obs

○A2a06:98c1:3121::2026-03-13 → 2026-07-04 · 9 obs

○A66.151.181.492015-07-16 → 2015-07-16 · 3 obs

● 2015-07-16 01:15:54
○ 2016-02-10 00:48:12
○ 2026-07-13 15:19:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
executivecourses.com	josh.ns.cloudflare.com, uma.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.146

NS records: josh.ns.cloudflare.com, uma.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for executivecourses.com (unsigned zone)

⏱️ Timing

Total: 176ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.215.42, 104.21.53.163`
AAAA	2	`2606:4700:3032::ac43:d72a, 2606:4700:3031::6815:35a3`
NS	2	`josh.ns.cloudflare.com, uma.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	2	`google-site-verification=KjGcJkyaOUe7PO5, google-site-verification=m7idsytIWyjFt8t`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`josh.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

executivecourses.com directs to four IP numbers, which are 104.21.53.163, 172.67.215.42, 2606:4700:3031::6815:35a3 and 2606:4700:3032::ac43:d72a.

Additional host names — absolutelycleanservices.com, wallpaperscraft.eu.org, dukadi.biz and two others — share IP numbers with executivecourses.com.

Name Servers

Two name servers handle the delegation for executivecourses.com: josh.ns.cloudflare.com and uma.ns.cloudflare.com.

executivecourses.com shares its name server setup with other domains, including australianopenshop.tennis, alamoyasociados.com, lemon.fr and two others.

There is at least partial name server overlap between executivecourses.com and other domains — worldspeech.com, autotica.com, sinets.com and two more among them.

These name servers are routinely deployed together with the name servers linda.ns.cloudflare.com.

Host names with 6 IP numbers:

josh.ns.cloudflare.com resolves to 108.162.193.126, 172.64.33.126 and 173.245.59.126 among others, with 3 other IP addresses in total.

uma.ns.cloudflare.com resolves to 108.162.192.146, 172.64.32.146 and 173.245.58.146 among others, with 3 other IP addresses in total.

Mail Servers

Five mail servers handle executivecourses.com: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

executivecourses.com shares mail servers — at least in part — with other domains, including ontariowater.ca, rebarmaster.com, ns500765.ns500765.ns500693.ns500693.ns500699.ns500693.ns500693.ns500683.ns500699.ns500683.ns500699.ns500693.ns500588.ns500110.dtrkdll.com and two others.

These mail servers are frequently paired with the mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and aspmx3.googlemail.com.

Host names with two IP numbers:

aspmx.l.google.com resolves to two addresses: 172.253.63.27 and 2607:f8b0:4004:c1d::1a.

alt1.aspmx.l.google.com resolves to two addresses: 108.177.123.26 and 2800:3f0:4003:c0f::1b.

alt2.aspmx.l.google.com resolves to two addresses: 172.253.116.27 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com resolves to two addresses: 192.178.223.27 and 2a00:1450:4009:c0f::1b.

alt4.aspmx.l.google.com resolves to two addresses: 172.253.157.27 and 2a00:1450:400c:c23::1b.