hack.courses - dns.ninja

`hack.courses`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:825^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:9cc5^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.8.37^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.156.197^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`alexis.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b3c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alexis.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c13c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`alexis.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:213c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`alexis.ns.cloudflare.com`
		A	108.162.193.60^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alexis.ns.cloudflare.com`
		A	172.64.33.60^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alexis.ns.cloudflare.com`
		A	173.245.59.60^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alexis.ns.cloudflare.com`
NS	`gene.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a9e^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gene.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c09e^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`gene.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:209e^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`gene.ns.cloudflare.com`
		A	108.162.192.158^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gene.ns.cloudflare.com`
		A	172.64.32.158^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gene.ns.cloudflare.com`
		A	173.245.58.158^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gene.ns.cloudflare.com`
TXT	`1\|www.hack.courses`
TXT	`v=spf1 include:mx.ovh.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.8.37, 172.67.156.197
		IPv6 hints	2606:4700:3031::6815:825, 2606:4700:3035::ac43:9cc5
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=14, name=cloudflare-ech.com
SOA	`alexis.ns.cloudflare.com`dns@cloudflare.com serial=2405974001

`courses`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.nic.courses` ⭐
	NS	`b.nic.courses`
	NS	`c.nic.courses`
	NS	`x.nic.courses`
	NS	`y.nic.courses`
	NS	`z.nic.courses`
	SOA	`a.nic.courses`admin@tldns.godaddy serial=1780556720

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DNS History

10 records (6 active, 4 former)

●NSalexis.ns.cloudflare.com2026-02-16 → 2026-06-04 · 2 obs

● 2026-02-16 11:20:06
● 2026-06-04 07:50:20

●NSgene.ns.cloudflare.com2026-02-16 → 2026-06-04 · 2 obs

● 2026-02-16 11:20:06
● 2026-06-04 07:50:20

●A104.21.8.372026-02-16 → 2026-06-04 · 12 obs

● 2026-02-16 11:20:06
● 2026-02-25 19:05:20
○ 2026-03-11 08:11:18
● 2026-03-11 12:34:48
● 2026-03-16 01:21:04
○ 2026-03-26 06:00:38
● 2026-03-26 11:26:08
● 2026-05-08 00:55:40
○ 2026-05-12 00:35:42
○ 2026-05-27 15:25:24
● 2026-05-29 14:59:26
● 2026-06-04 07:50:20

●A172.67.156.1972026-02-16 → 2026-06-04 · 12 obs

○A188.114.96.02026-03-11 → 2026-05-27 · 11 obs

○ 2026-02-25 19:05:20
● 2026-03-11 08:11:18
○ 2026-03-11 12:34:48
○ 2026-03-16 01:21:04
● 2026-03-26 06:00:38
○ 2026-03-26 11:26:08
○ 2026-05-08 00:55:40
● 2026-05-12 00:35:42
● 2026-05-27 15:25:24
○ 2026-05-29 14:59:26
○ 2026-06-04 07:50:20

○A188.114.97.02026-03-11 → 2026-05-27 · 11 obs

●A2606:4700:3031::6815:8252026-02-16 → 2026-06-04 · 12 obs

●A2606:4700:3035::ac43:9cc52026-02-16 → 2026-06-04 · 12 obs

○A2a06:98c1:3120::2026-03-11 → 2026-05-27 · 11 obs

○A2a06:98c1:3121::2026-03-11 → 2026-05-27 · 11 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
courses	z.nic.courses, b.nic.courses, x.nic.courses, y.nic.courses...	12 records
hack.courses	gene.ns.cloudflare.com, alexis.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.58.158

NS records: gene.ns.cloudflare.com, alexis.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for hack.courses (unsigned zone)

⏱️ Timing

Total: 425ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.8.37, 172.67.156.197`
AAAA	2	`2606:4700:3031::6815:825, 2606:4700:3035::ac43:9cc5`
NS	2	`alexis.ns.cloudflare.com, gene.ns.cloudflare.com`
TXT	2	`1\|www.hack.courses, v=spf1 include:mx.ovh.com ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`alexis.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (z.nic.courses, z.nic.courses, b.nic.courses...)

Analysis

IP Addresses

hack.courses has 4 IP addresses: 104.21.8.37, 172.67.156.197, 2606:4700:3031::6815:825 and 2606:4700:3035::ac43:9cc5.

ikingza.com, guilindy.com, cultpro73.ru and two other host names share IP numbers with hack.courses.

Name Servers

hack.courses is delegated to two name servers: alexis.ns.cloudflare.com and gene.ns.cloudflare.com.

hack.courses uses the same name servers as several other domains — among them a-kon.ru, lp1.eu, a-briz.ru and two more.

hack.courses shares at least some of its name servers with other domains, including viewmaster.tv, simpla.pro, lupdelup.com and two others.

These name servers are frequently paired with the name servers lila.ns.cloudflare.com and blair.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

alexis.ns.cloudflare.com points to 108.162.193.60, 172.64.33.60, 173.245.59.60 and three other IP addresses.

gene.ns.cloudflare.com points to 108.162.192.158, 172.64.32.158, 173.245.58.158 and three other IP addresses.