reactbasics.courses - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`reactbasics.courses`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:8ccc^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:1b12^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.27.18^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.140.204^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`algin.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b3d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`algin.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c13d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`algin.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:213d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`algin.ns.cloudflare.com`
		A	108.162.193.61^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`algin.ns.cloudflare.com`
		A	172.64.33.61^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`algin.ns.cloudflare.com`
		A	173.245.59.61^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`algin.ns.cloudflare.com`
NS	`jamie.ns.cloudflare.com`
		A	2606:4700:50::adf5:3aa8^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jamie.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0a8^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jamie.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20a8^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jamie.ns.cloudflare.com`
		A	108.162.192.168^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jamie.ns.cloudflare.com`
		A	172.64.32.168^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jamie.ns.cloudflare.com`
		A	173.245.58.168^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jamie.ns.cloudflare.com`
MX	`smtp.google.com` ⭐
		A	2a00:1450:4013:c00::1a^{🇳🇱 Google2a00:1450:4013::/48}
			PTR	`ei-in-f26.1e100.net`
		A	2a00:1450:4013:c07::1a^{🇳🇱 Google2a00:1450:4013::/48}
			PTR	`el-in-f26.1e100.net`
		A	2a00:1450:4013:c07::1b^{🇳🇱 Google2a00:1450:4013::/48}
			PTR	`el-in-f27.1e100.net`
		A	2a00:1450:4013:c08::1b^{🇳🇱 Google2a00:1450:4013::/48}
			PTR	`en-in-f27.1e100.net`
		A	74.125.128.26^{🇺🇸 Google74.125.128.0/24}
			PTR	`ec-in-f26.1e100.net`
		A	74.125.128.27^{🇺🇸 Google74.125.128.0/24}
			PTR	`ec-in-f27.1e100.net`
		A	74.125.143.26^{🇺🇸 Google74.125.143.0/24}
			PTR	`ed-in-f26.1e100.net`
		A	74.125.143.27^{🇺🇸 Google74.125.143.0/24}
			PTR	`ed-in-f27.1e100.net`
		A	173.194.69.27^{🇺🇸 Google173.194.69.0/24}
			PTR	`ef-in-f27.1e100.net`
TXT	`google-site-verification=VZ9csDr0E-eHNccTTzUOY_4OM_j9t7ovlPJSup__TjI`
TXT	`v=spf1 include:_spf.google.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.27.18, 172.67.140.204
		IPv6 hints	2606:4700:3030::ac43:8ccc, 2606:4700:3037::6815:1b12
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=56, name=cloudflare-ech.com
SOA	`algin.ns.cloudflare.com`dns@cloudflare.com serial=2418086818

`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=1792764604

⚠️ On DNS blocklist: spam-tlds

Same first word

reactbasics.courses

Similar names

caistercabs.co.uk

caistercabs.com

Previous names

Next names

DNS History

11 records (7 active, 4 former)

●NSalgin.ns.cloudflare.com2026-08-17 → 2026-10-23 · 2 obs

● 2026-08-17 12:31:36
● 2026-10-23 14:20:00

●NSjamie.ns.cloudflare.com2026-08-17 → 2026-10-23 · 2 obs

● 2026-08-17 12:31:36
● 2026-10-23 14:20:00

●MXsmtp.google.com2026-08-17 → 2026-10-23 · 2 obs

● 2026-08-17 12:31:36
● 2026-10-23 14:20:00

●A104.21.27.182026-09-25 → 2026-10-23 · 3 obs

○ 2026-08-17 12:31:36
● 2026-09-25 20:18:50
● 2026-10-23 14:20:00

●A172.67.140.2042026-09-25 → 2026-10-23 · 3 obs

○ 2026-08-17 12:31:36
● 2026-09-25 20:18:50
● 2026-10-23 14:20:00

○A188.114.96.02026-08-17 → 2026-08-17 · 3 obs

● 2026-08-17 12:31:36
○ 2026-09-25 20:18:50
○ 2026-10-23 14:20:00

○A188.114.97.02026-08-17 → 2026-08-17 · 3 obs

● 2026-08-17 12:31:36
○ 2026-09-25 20:18:50
○ 2026-10-23 14:20:00

●A2606:4700:3030::ac43:8ccc2026-09-25 → 2026-10-23 · 3 obs

○ 2026-08-17 12:31:36
● 2026-09-25 20:18:50
● 2026-10-23 14:20:00

●A2606:4700:3037::6815:1b122026-09-25 → 2026-10-23 · 3 obs

○ 2026-08-17 12:31:36
● 2026-09-25 20:18:50
● 2026-10-23 14:20:00

○A2a06:98c1:3120::2026-08-17 → 2026-08-17 · 3 obs

● 2026-08-17 12:31:36
○ 2026-09-25 20:18:50
○ 2026-10-23 14:20:00

○A2a06:98c1:3121::2026-08-17 → 2026-08-17 · 3 obs

● 2026-08-17 12:31:36
○ 2026-09-25 20:18:50
○ 2026-10-23 14:20:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
courses	a.nic.courses, b.nic.courses, c.nic.courses, x.nic.courses...	12 records
reactbasics.courses	algin.ns.cloudflare.com, jamie.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.61

NS records: algin.ns.cloudflare.com, jamie.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for reactbasics.courses (unsigned zone)

⏱️ Timing

Total: 2304ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.140.204, 104.21.27.18`
AAAA	2	`2606:4700:3037::6815:1b12, 2606:4700:3030::ac43:8ccc`
NS	2	`algin.ns.cloudflare.com, jamie.ns.cloudflare.com`
MX	1	`smtp.google.com (pri: 1)`
TXT	2	`google-site-verification=VZ9csDr0E-eHNcc, v=spf1 include:_spf.google.com ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`algin.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

reactbasics.courses has four IP addresses: 104.21.27.18, 172.67.140.204, 2606:4700:3030::ac43:8ccc and 2606:4700:3037::6815:1b12.

petersonmn.org, nn227tv.top, wcre.ca plus two other host names have IP numbers in common with reactbasics.courses.

Name Servers

Two name servers handle the delegation for reactbasics.courses: algin.ns.cloudflare.com and jamie.ns.cloudflare.com.

The name server configuration of reactbasics.courses is shared with other domains, for instance healthyvegankids.net, h-hangus.com, redhillfarms.net and two others.

reactbasics.courses shares at least some of its name servers with other domains, including kodheng2.com, apicheckout.com, magaritours.co.uk and two others.

These name servers are frequently paired with the name servers betty.ns.cloudflare.com, lorna.ns.cloudflare.com and arya.ns.cloudflare.com.

Hosts with 6 IP addresses each:

algin.ns.cloudflare.com resolves to 108.162.193.61, 172.64.33.61 and 173.245.59.61 among others, with 3 other IP addresses in total.

jamie.ns.cloudflare.com resolves to 108.162.192.168, 172.64.32.168 and 173.245.58.168 among others, with 3 other IP addresses in total.

Mail Servers

reactbasics.courses uses one mail server — smtp.google.com.

The mail server setup of reactbasics.courses matches that of other domains such as theboxxmen.com, try-agnitio.com, mana.space and two others.

reactbasics.courses has at least some mail servers in common with other domains, such as chambers-consulting.com, askmetimmy.com, acivstructure.link and amilova.com.

smtp.google.com has 9 IP addresses: 74.125.128.26, 74.125.128.27, 74.125.143.26 plus 6 more.