`codingkurse.at`

DNSSEC	⚠️ Not signed
A	2606:4700:3035::6815:84c^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:9cee^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.8.76^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.156.238^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`adam.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b36^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`adam.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c136^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`adam.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2136^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`adam.ns.cloudflare.com`
		A	108.162.193.54^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`adam.ns.cloudflare.com`
		A	172.64.33.54^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`adam.ns.cloudflare.com`
		A	173.245.59.54^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`adam.ns.cloudflare.com`
NS	`kehlani.ns.cloudflare.com`
		A	2606:4700:50::a29f:26df^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kehlani.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2df^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`kehlani.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22df^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`kehlani.ns.cloudflare.com`
		A	108.162.194.223^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kehlani.ns.cloudflare.com`
		A	162.159.38.223^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kehlani.ns.cloudflare.com`
		A	172.64.34.223^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kehlani.ns.cloudflare.com`
MX	`mail.codingkurse.at` ⭐
		A	2606:4700:3035::6815:84c^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	2606:4700:3037::ac43:9cee^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	104.21.8.76^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.67.156.238^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
MX	`mx1511.netcup.net`⁽⁵⁰⁾
		A	2a0a:4cc0:4:c:d861:b4ff:fef9:88a2^{🇦🇹 netcup-AS2a0a:4cc0::/43}
			PTR	`mx1511.netcup.net`
		A	89.58.21.17^{🇩🇪 netcup-AS89.58.16.0/21}
			PTR	`mx1511.netcup.net`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.8.76, 172.67.156.238
		IPv6 hints	2606:4700:3035::6815:84c, 2606:4700:3037::ac43:9cee
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=171, name=cloudflare-ech.com
SOA	`adam.ns.cloudflare.com`dns@cloudflare.com serial=2403691068

`at`

	DNSSEC	🔒 Signed (DS record present)
	NS	`dns.nic.at` ⭐
	NS	`d.ns.at`
	NS	`j.ns.at`
	NS	`n.ns.at`
	NS	`ns1.univie.ac.at`
	NS	`ns2.univie.ac.at`
	NS	`r.ns.at`
	NS	`u.ns.at`
	SOA	`dns.nic.at`domain-admin@univie.ac.at serial=1778446802

Subdomains

mail.codingkurse.at

Same first word

codingkurse.at

DNS History

8 records (8 active, 0 former)

●NSadam.ns.cloudflare.com2026-02-22 → 2026-05-10 · 2 obs

● 2026-02-22 06:28:54
● 2026-05-10 21:12:14

●NSkehlani.ns.cloudflare.com2026-02-22 → 2026-05-10 · 2 obs

● 2026-02-22 06:28:54
● 2026-05-10 21:12:14

●MXmail.codingkurse.at2026-02-22 → 2026-05-10 · 2 obs

● 2026-02-22 06:28:54
● 2026-05-10 21:12:14

●MXmx1511.netcup.net2026-02-22 → 2026-05-10 · 2 obs

● 2026-02-22 06:28:54
● 2026-05-10 21:12:14

●A104.21.8.762026-02-22 → 2026-05-10 · 2 obs

● 2026-02-22 06:28:54
● 2026-05-10 21:12:14

●A172.67.156.2382026-02-22 → 2026-05-10 · 2 obs

● 2026-02-22 06:28:54
● 2026-05-10 21:12:14

●A2606:4700:3035::6815:84c2026-02-22 → 2026-05-10 · 2 obs

● 2026-02-22 06:28:54
● 2026-05-10 21:12:14

●A2606:4700:3037::ac43:9cee2026-02-22 → 2026-05-10 · 2 obs

● 2026-02-22 06:28:54
● 2026-05-10 21:12:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
at	u.ns.at, ns2.univie.ac.at, n.ns.at, d.ns.at...	-
codingkurse.at	adam.ns.cloudflare.com, kehlani.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.34.223

NS records: adam.ns.cloudflare.com, kehlani.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for codingkurse.at (unsigned zone)

⏱️ Timing

Total: 611ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.8.76, 172.67.156.238`
AAAA	2	`2606:4700:3037::ac43:9cee, 2606:4700:3035::6815:84c`
NS	2	`adam.ns.cloudflare.com, kehlani.ns.cloudflare.com`
MX	2	`mail.codingkurse.at (pri: 10), mx1511.netcup.net (pri: 50)`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`adam.ns.cloudflare.com dns.cloudflare.co`

Analysis

Hierarchy

The parent of mail.codingkurse.at is codingkurse.at.

IP Addresses

codingkurse.at maps to four IP numbers: 2606:4700:3035::6815:84c, 2606:4700:3037::ac43:9cee, 104.21.8.76 and 172.67.156.238.

Other host names such as ma.www.bonikbarta.com, farmersmonthly.com, colorado.productions.colorado.network, vidaeideasportal.mx and janda69.club share IPs with codingkurse.at.

Name Servers

Two name servers adam.ns.cloudflare.com and kehlani.ns.cloudflare.com handle the delegation for codingkurse.at.

codingkurse.at shares the same name server setup as other domains, for example cwjcu.com, xerifetech.com, ditvora.com, gfoehler.at and eesti.ca.

codingkurse.at at least partially shares name servers with other domains, for example gymbabes.co.uk, xxeasy.net, archard.co.uk, xsmtp.net and booking-payment-5609.com.

These name servers are often used together with otto.ns.cloudflare.com and sonia.ns.cloudflare.com.

Host names with six IP numbers:

adam.ns.cloudflare.com points to 2606:4700:58::adf5:3b36, 2803:f800:50::6ca2:c136, 2a06:98c1:50::ac40:2136, 108.162.193.54, 172.64.33.54 and 173.245.59.54.

kehlani.ns.cloudflare.com points to 2606:4700:50::a29f:26df, 2803:f800:50::6ca2:c2df, 2a06:98c1:50::ac40:22df, 108.162.194.223, 162.159.38.223 and 172.64.34.223.

Mail Servers

Two mail servers handle codingkurse.at: mail.codingkurse.at and mx1511.netcup.net.

codingkurse.at shares at least partially some mail servers with other domains, for instance mirage-world.com, savestheclimate.com, heilsein.at, herrenfriseur-birbey.at and bin4ry.com.

Host names with four IP numbers:

mail.codingkurse.at points to 2606:4700:3035::6815:84c, 2606:4700:3037::ac43:9cee, 104.21.8.76 and 172.67.156.238.

Host names with two IP numbers:

mx1511.netcup.net points to 2a0a:4cc0:4:c:d861:b4ff:fef9:88a2 and 89.58.21.17.

codingkurse.at - robtex.com

codingkurse.at

at

Subdomains

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`codingkurse.at`

`at`