hack.courses - dns.ninja

hack.courses

DNSSECโš ๏ธ Not signed
A2606:4700:3031::6815:825Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US โœ“ In HTTPS hints
A2606:4700:3035::ac43:9cc5Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US โœ“ In HTTPS hints
A104.21.8.37Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US โœ“ In HTTPS hints
A172.67.156.197Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US โœ“ In HTTPS hints
NSalexis.ns.cloudflare.com โญ
NSgene.ns.cloudflare.com
TXT1|www.hack.courses
TXTv=spf1 include:mx.ovh.com ~all
HTTPSHTTP/3, HTTP/2 โœ“ hints match
IPv4 hints104.21.8.37, 172.67.156.197
IPv6 hints2606:4700:3031::6815:825, 2606:4700:3035::ac43:9cc5
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=14, name=cloudflare-ech.com
SOAalexis.ns.cloudflare.comdns@cloudflare.com serial=2405974001

courses

DNSSEC๐Ÿ”’ Signed (DS record present)
NSa.nic.courses โญ
NSb.nic.courses
NSc.nic.courses
NSx.nic.courses
NSy.nic.courses
NSz.nic.courses
SOAa.nic.coursesadmin@tldns.godaddy serial=1780581499

DNS History

10 records (6 active, 4 former)

NSalexis.ns.cloudflare.comgene.ns.cloudflare.comA104.21.8.37172.67.156.1972606:4700:3031::6815:8252606:4700:3035::ac43:9cc5188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
โ—NSalexis.ns.cloudflare.com2026-02-16 โ†’ 2026-06-04 ยท 2 obs
โ— 2026-02-16 11:20:06
โ— 2026-06-04 15:17:30
โ—NSgene.ns.cloudflare.com2026-02-16 โ†’ 2026-06-04 ยท 2 obs
โ— 2026-02-16 11:20:06
โ— 2026-06-04 15:17:30
โ—A104.21.8.372026-02-16 โ†’ 2026-06-04 ยท 12 obs
โ— 2026-02-16 11:20:06
โ— 2026-02-25 19:05:20
โ—‹ 2026-03-11 08:11:18
โ— 2026-03-11 12:34:48
โ— 2026-03-16 01:21:04
โ—‹ 2026-03-26 06:00:38
โ— 2026-03-26 11:26:08
โ— 2026-05-08 00:55:40
โ—‹ 2026-05-12 00:35:42
โ—‹ 2026-05-27 15:25:24
โ— 2026-05-29 14:59:26
โ— 2026-06-04 15:17:30
โ—A172.67.156.1972026-02-16 โ†’ 2026-06-04 ยท 12 obs
โ— 2026-02-16 11:20:06
โ— 2026-02-25 19:05:20
โ—‹ 2026-03-11 08:11:18
โ— 2026-03-11 12:34:48
โ— 2026-03-16 01:21:04
โ—‹ 2026-03-26 06:00:38
โ— 2026-03-26 11:26:08
โ— 2026-05-08 00:55:40
โ—‹ 2026-05-12 00:35:42
โ—‹ 2026-05-27 15:25:24
โ— 2026-05-29 14:59:26
โ— 2026-06-04 15:17:30
โ—‹A188.114.96.02026-03-11 โ†’ 2026-05-27 ยท 11 obs
โ—‹ 2026-02-25 19:05:20
โ— 2026-03-11 08:11:18
โ—‹ 2026-03-11 12:34:48
โ—‹ 2026-03-16 01:21:04
โ— 2026-03-26 06:00:38
โ—‹ 2026-03-26 11:26:08
โ—‹ 2026-05-08 00:55:40
โ— 2026-05-12 00:35:42
โ— 2026-05-27 15:25:24
โ—‹ 2026-05-29 14:59:26
โ—‹ 2026-06-04 15:17:30
โ—‹A188.114.97.02026-03-11 โ†’ 2026-05-27 ยท 11 obs
โ—‹ 2026-02-25 19:05:20
โ— 2026-03-11 08:11:18
โ—‹ 2026-03-11 12:34:48
โ—‹ 2026-03-16 01:21:04
โ— 2026-03-26 06:00:38
โ—‹ 2026-03-26 11:26:08
โ—‹ 2026-05-08 00:55:40
โ— 2026-05-12 00:35:42
โ— 2026-05-27 15:25:24
โ—‹ 2026-05-29 14:59:26
โ—‹ 2026-06-04 15:17:30
โ—A2606:4700:3031::6815:8252026-02-16 โ†’ 2026-06-04 ยท 12 obs
โ— 2026-02-16 11:20:06
โ— 2026-02-25 19:05:20
โ—‹ 2026-03-11 08:11:18
โ— 2026-03-11 12:34:48
โ— 2026-03-16 01:21:04
โ—‹ 2026-03-26 06:00:38
โ— 2026-03-26 11:26:08
โ— 2026-05-08 00:55:40
โ—‹ 2026-05-12 00:35:42
โ—‹ 2026-05-27 15:25:24
โ— 2026-05-29 14:59:26
โ— 2026-06-04 15:17:30
โ—A2606:4700:3035::ac43:9cc52026-02-16 โ†’ 2026-06-04 ยท 12 obs
โ— 2026-02-16 11:20:06
โ— 2026-02-25 19:05:20
โ—‹ 2026-03-11 08:11:18
โ— 2026-03-11 12:34:48
โ— 2026-03-16 01:21:04
โ—‹ 2026-03-26 06:00:38
โ— 2026-03-26 11:26:08
โ— 2026-05-08 00:55:40
โ—‹ 2026-05-12 00:35:42
โ—‹ 2026-05-27 15:25:24
โ— 2026-05-29 14:59:26
โ— 2026-06-04 15:17:30
โ—‹A2a06:98c1:3120::2026-03-11 โ†’ 2026-05-27 ยท 11 obs
โ—‹ 2026-02-25 19:05:20
โ— 2026-03-11 08:11:18
โ—‹ 2026-03-11 12:34:48
โ—‹ 2026-03-16 01:21:04
โ— 2026-03-26 06:00:38
โ—‹ 2026-03-26 11:26:08
โ—‹ 2026-05-08 00:55:40
โ— 2026-05-12 00:35:42
โ— 2026-05-27 15:25:24
โ—‹ 2026-05-29 14:59:26
โ—‹ 2026-06-04 15:17:30
โ—‹A2a06:98c1:3121::2026-03-11 โ†’ 2026-05-27 ยท 11 obs
โ—‹ 2026-02-25 19:05:20
โ— 2026-03-11 08:11:18
โ—‹ 2026-03-11 12:34:48
โ—‹ 2026-03-16 01:21:04
โ— 2026-03-26 06:00:38
โ—‹ 2026-03-26 11:26:08
โ—‹ 2026-05-08 00:55:40
โ— 2026-05-12 00:35:42
โ— 2026-05-27 15:25:24
โ—‹ 2026-05-29 14:59:26
โ—‹ 2026-06-04 15:17:30

๐Ÿ” DNS Trace

๐Ÿ“‹ Delegation Chain

ZoneNameserversGlue
coursesa.nic.courses, b.nic.courses, c.nic.courses, x.nic.courses...12 records
hack.coursesgene.ns.cloudflare.com, alexis.ns.cloudflare.com-

โœ… Authoritative Response

Server:173.245.58.158

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

๐Ÿ”’ DNSSEC Status

โš ๏ธ Insecure (no DNSSEC)

No DS record for hack.courses (unsigned zone)

โฑ๏ธ Timing

Total: 4621ms | Queries: -

๐Ÿ“„ Records

TypeCountSample Data
A2104.21.8.37, 172.67.156.197
AAAA22606:4700:3035::ac43:9cc5, 2606:4700:3031::6815:825
NS2alexis.ns.cloudflare.com, gene.ns.cloudflare.com
TXT21|www.hack.courses, v=spf1 include:mx.ovh.com ~all
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1alexis.ns.cloudflare.com dns.cloudflare.

๐Ÿ“Œ Glue Records Collected

Total: 12

In-bailiwick: 12 (a.nic.courses, b.nic.courses, c.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.

Name Servers

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