`promptengineeringcourse.online`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:5247^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3032::ac43:c5bd^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.82.71^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.197.189^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`kurt.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3bc1^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kurt.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1c1^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`kurt.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21c1^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`kurt.ns.cloudflare.com`
		A	108.162.193.193^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kurt.ns.cloudflare.com`
		A	172.64.33.193^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kurt.ns.cloudflare.com`
		A	173.245.59.193^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kurt.ns.cloudflare.com`
NS	`liz.ns.cloudflare.com`
		A	2606:4700:50::adf5:3abd^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`liz.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0bd^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`liz.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20bd^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`liz.ns.cloudflare.com`
		A	108.162.192.189^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`liz.ns.cloudflare.com`
		A	172.64.32.189^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`liz.ns.cloudflare.com`
		A	173.245.58.189^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`liz.ns.cloudflare.com`
MX	`mail.promptengineeringcourse.online` ⭐
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.82.71, 172.67.197.189
		IPv6 hints	2606:4700:3031::6815:5247, 2606:4700:3032::ac43:c5bd
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=16, name=cloudflare-ech.com
SOA	`kurt.ns.cloudflare.com`dns@cloudflare.com serial=2407552447

`online`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns01.trs-dns.com` ⭐
	NS	`ns.trs-dns.com`
	NS	`ns01.trs-dns.net`
	NS	`ns10.trs-dns.info`
	NS	`ns10.trs-dns.org`
	SOA	`ns.trs-dns.com`trs-ops@tucows.com serial=1785371622

Same first word

promptengineeringcourse.online

DNS History

9 records (7 active, 2 former)

●NSkurt.ns.cloudflare.com2026-04-16 → 2026-07-30 · 2 obs

● 2026-04-16 23:10:26
● 2026-07-30 00:39:52

●NSliz.ns.cloudflare.com2026-04-16 → 2026-07-30 · 2 obs

● 2026-04-16 23:10:26
● 2026-07-30 00:39:52

●MXmail.promptengineeringcourse.online2026-04-16 → 2026-07-30 · 2 obs

● 2026-04-16 23:10:26
● 2026-07-30 00:39:52

●A104.21.82.712026-04-16 → 2026-07-30 · 2 obs

● 2026-04-16 23:10:26
● 2026-07-30 00:39:52

●A172.67.197.1892026-04-16 → 2026-07-30 · 2 obs

● 2026-04-16 23:10:26
● 2026-07-30 00:39:52

●A2606:4700:3031::6815:52472026-07-19 → 2026-07-30 · 3 obs

○ 2026-04-16 23:10:26
● 2026-07-19 09:57:38
● 2026-07-30 00:39:52

●A2606:4700:3032::ac43:c5bd2026-07-19 → 2026-07-30 · 3 obs

○ 2026-04-16 23:10:26
● 2026-07-19 09:57:38
● 2026-07-30 00:39:52

○A2606:4700:3034::6815:52472026-04-16 → 2026-04-16 · 3 obs

● 2026-04-16 23:10:26
○ 2026-07-19 09:57:38
○ 2026-07-30 00:39:52

○A2606:4700:3036::ac43:c5bd2026-04-16 → 2026-04-16 · 3 obs

● 2026-04-16 23:10:26
○ 2026-07-19 09:57:38
○ 2026-07-30 00:39:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
online	ns10.trs-dns.info, ns01.trs-dns.net, ns01.trs-dns.com, ns10.trs-dns.org	-
promptengineeringcourse.online	liz.ns.cloudflare.com, kurt.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.193

NS records: liz.ns.cloudflare.com, kurt.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for promptengineeringcourse.online (unsigned zone)

⏱️ Timing

Total: 419ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.82.71, 172.67.197.189`
AAAA	2	`2606:4700:3032::ac43:c5bd, 2606:4700:3031::6815:5247`
NS	2	`kurt.ns.cloudflare.com, liz.ns.cloudflare.com`
MX	1	`mail.promptengineeringcourse.online (pri`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`kurt.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

promptengineeringcourse.online directs to four IP numbers, which are 104.21.82.71, 172.67.197.189, 2606:4700:3031::6815:5247 and 2606:4700:3032::ac43:c5bd.

pcambala.com, www.blugraphy.com, juntahispana.net and two other host names share IP numbers with promptengineeringcourse.online.

Name Servers

DNS delegation for promptengineeringcourse.online points to two name servers: kurt.ns.cloudflare.com and liz.ns.cloudflare.com.

promptengineeringcourse.online uses the same name servers as several other domains — among them achilleswheel.com, orangelinemg.com, readingsounds.net and two more.

The name servers of promptengineeringcourse.online overlap at least partially with those of other domains — among them buzz2maker.pro, starrealms.com, automation.agency and two more.

These name servers commonly appear alongside the name servers miki.ns.cloudflare.com and zahir.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

kurt.ns.cloudflare.com has IP addresses 108.162.193.193, 172.64.33.193 and 173.245.59.193, plus 3 other.

liz.ns.cloudflare.com has IP addresses 108.162.192.189, 172.64.32.189 and 173.245.58.189, plus 3 other.

Mail Servers

Mail for promptengineeringcourse.online is handled by a single mail server, mail.promptengineeringcourse.online.

promptengineeringcourse.online - robtex.com