`predict.courses`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:2d03^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::ac43:cf09^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.45.3^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.207.9^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`harlee.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:26ee^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`harlee.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2ee^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`harlee.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22ee^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`harlee.ns.cloudflare.com`
		A	108.162.194.238^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`harlee.ns.cloudflare.com`
		A	162.159.38.238^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`harlee.ns.cloudflare.com`
		A	172.64.34.238^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`harlee.ns.cloudflare.com`
NS	`tosana.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c2b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tosana.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c32b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`tosana.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:232b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`tosana.ns.cloudflare.com`
		A	108.162.195.43^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tosana.ns.cloudflare.com`
		A	162.159.44.43^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tosana.ns.cloudflare.com`
		A	172.64.35.43^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tosana.ns.cloudflare.com`
MX	`route1.mx.cloudflare.net` ⭐
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
MX	`route2.mx.cloudflare.net`⁽⁷⁵⁾
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
MX	`route3.mx.cloudflare.net`⁽⁸⁴⁾
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.45.3, 172.67.207.9
		IPv6	2606:4700:3032::6815:2d03, 2606:4700:3034::ac43:cf09
SOA	`harlee.ns.cloudflare.com`dns@cloudflare.com serial=2397039516

`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=1774140923

⚠️ On DNS blocklist: tif

Same first word

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DNS History

9 records (9 active, 0 former)

●NSharlee.ns.cloudflare.com2026-03-19 → 2026-03-22 · 2 obs

● 2026-03-19 05:49:10
● 2026-03-22 01:55:02

●NStosana.ns.cloudflare.com2026-03-19 → 2026-03-22 · 2 obs

● 2026-03-19 05:49:10
● 2026-03-22 01:55:02

●MXroute1.mx.cloudflare.net2026-03-19 → 2026-03-22 · 2 obs

● 2026-03-19 05:49:10
● 2026-03-22 01:55:02

●MXroute2.mx.cloudflare.net2026-03-19 → 2026-03-22 · 2 obs

● 2026-03-19 05:49:10
● 2026-03-22 01:55:02

●MXroute3.mx.cloudflare.net2026-03-19 → 2026-03-22 · 2 obs

● 2026-03-19 05:49:10
● 2026-03-22 01:55:02

●A104.21.45.32026-03-19 → 2026-03-22 · 2 obs

● 2026-03-19 05:49:10
● 2026-03-22 01:55:02

●A172.67.207.92026-03-19 → 2026-03-22 · 2 obs

● 2026-03-19 05:49:10
● 2026-03-22 01:55:02

●A2606:4700:3032::6815:2d032026-03-19 → 2026-03-22 · 2 obs

● 2026-03-19 05:49:10
● 2026-03-22 01:55:02

●A2606:4700:3034::ac43:cf092026-03-19 → 2026-03-22 · 2 obs

● 2026-03-19 05:49:10
● 2026-03-22 01:55:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
courses	a.nic.courses, b.nic.courses, c.nic.courses, x.nic.courses...	12 records
predict.courses	harlee.ns.cloudflare.com, tosana.ns.cloudflare.com	-

✅ Authoritative Response

Server: 162.159.44.43

NS records: harlee.ns.cloudflare.com, tosana.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for predict.courses (unsigned zone)

⏱️ Timing

Total: 638ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.207.9, 104.21.45.3`
AAAA	2	`2606:4700:3034::ac43:cf09, 2606:4700:3032::6815:2d03`
NS	2	`harlee.ns.cloudflare.com, tosana.ns.cloudflare.com`
MX	3	`route1.mx.cloudflare.net (pri: 10), route2.mx.cloudflare.net (pri: 75)...`
TXT	1	`v=spf1 include:_spf.mx.cloudflare.net ~a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`harlee.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

predict.courses resolves to four IP numbers: 2606:4700:3032::6815:2d03, 2606:4700:3034::ac43:cf09, 104.21.45.3 and 172.67.207.9.

Other host names such as elparigo.com, scmaruba.com, ahlmik.se, gisi-interactive.com and mueller-solartechnik.com share IPs with predict.courses.

Name Servers

predict.courses is delegated to two name servers: harlee.ns.cloudflare.com and tosana.ns.cloudflare.com.

predict.courses shares the same name server setup as ssokkaldinaldinfrsaatt.org, predict.tattoo, crmon.space, emindokum.com and rmtmetalurji.com.

predict.courses at least partially shares name servers with other domains, for instance hostaldernes.es, mailmaster.lv, energytrainingcouncil.org, la10.ru and akyourant.com.

These name servers are commonly used together with amanda.ns.cloudflare.com, terin.ns.cloudflare.com and lars.ns.cloudflare.com.

Host names with six IP numbers:

harlee.ns.cloudflare.com points to 2606:4700:50::a29f:26ee, 2803:f800:50::6ca2:c2ee, 2a06:98c1:50::ac40:22ee, 108.162.194.238, 162.159.38.238 and 172.64.34.238.

tosana.ns.cloudflare.com points to 2606:4700:58::a29f:2c2b, 2803:f800:50::6ca2:c32b, 2a06:98c1:50::ac40:232b, 108.162.195.43, 162.159.44.43 and 172.64.35.43.

Mail Servers

Three mail servers handle predict.courses: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

predict.courses shares at least partially some mail servers with other domains, including mjsquared.net, halfdan.no, slotsmaniacircle.us, dunixa.com and talica.org.

Host names with six IP numbers:

route1.mx.cloudflare.net points to: 2606:4700:f5::b, 2606:4700:f5::c, 2606:4700:f5::d, 162.159.205.11, 162.159.205.12 and 162.159.205.13.

route2.mx.cloudflare.net points to: 2606:4700:f5::e, 2606:4700:f5::f, 2606:4700:f5::10, 162.159.205.17, 162.159.205.18 and 162.159.205.19.

route3.mx.cloudflare.net points to: 2606:4700:f5::11, 2606:4700:f5::12, 2606:4700:f5::13, 162.159.205.23, 162.159.205.24 and 162.159.205.25.

predict.courses - robtex.com

predict.courses

courses

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`predict.courses`

`courses`