`usdkzbvs.courses`

DNSSEC	⚠️ Not signed
A	2606:4700:3036::ac43:ad3f^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:1ea6^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.30.166^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.173.63^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`alan.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b39^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alan.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c139^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`alan.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2139^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`alan.ns.cloudflare.com`
		A	108.162.193.57^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alan.ns.cloudflare.com`
		A	172.64.33.57^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alan.ns.cloudflare.com`
		A	173.245.59.57^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alan.ns.cloudflare.com`
NS	`nova.ns.cloudflare.com`
		A	2606:4700:50::a29f:2681^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nova.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c281^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`nova.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2281^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`nova.ns.cloudflare.com`
		A	108.162.194.129^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nova.ns.cloudflare.com`
		A	162.159.38.129^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nova.ns.cloudflare.com`
		A	172.64.34.129^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nova.ns.cloudflare.com`
TXT	`google-site-verification=x5rsEqKH8DNAclhSSASV3iA2jtw_QN67CUk5eUFSiHY`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.30.166, 172.67.173.63
		IPv6	2606:4700:3036::ac43:ad3f, 2606:4700:3037::6815:1ea6
SOA	`alan.ns.cloudflare.com`dns@cloudflare.com serial=2397669499

`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=1774970889

⚠️ On DNS blocklist: tif

Subdomains

bi.usdkzbvs.courses

Same first word

usdkzbvs.courses

DNS History

6 records (6 active, 0 former)

●NSalan.ns.cloudflare.com2026-03-27 → 2026-03-31 · 2 obs

● 2026-03-27 23:14:26
● 2026-03-31 15:47:34

●NSnova.ns.cloudflare.com2026-03-27 → 2026-03-31 · 2 obs

● 2026-03-27 23:14:26
● 2026-03-31 15:47:34

●A104.21.30.1662026-03-27 → 2026-03-31 · 2 obs

● 2026-03-27 23:14:26
● 2026-03-31 15:47:34

●A172.67.173.632026-03-27 → 2026-03-31 · 2 obs

● 2026-03-27 23:14:26
● 2026-03-31 15:47:34

●A2606:4700:3036::ac43:ad3f2026-03-27 → 2026-03-31 · 2 obs

● 2026-03-27 23:14:26
● 2026-03-31 15:47:34

●A2606:4700:3037::6815:1ea62026-03-27 → 2026-03-31 · 2 obs

● 2026-03-27 23:14:26
● 2026-03-31 15:47:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
courses	a.nic.courses, b.nic.courses, c.nic.courses, x.nic.courses...	12 records
usdkzbvs.courses	alan.ns.cloudflare.com, nova.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.59.57

NS records: alan.ns.cloudflare.com, nova.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for usdkzbvs.courses (unsigned zone)

⏱️ Timing

Total: 1335ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.30.166, 172.67.173.63`
AAAA	2	`2606:4700:3037::6815:1ea6, 2606:4700:3036::ac43:ad3f`
NS	2	`alan.ns.cloudflare.com, nova.ns.cloudflare.com`
TXT	1	`google-site-verification=x5rsEqKH8DNAclh`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`alan.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

usdkzbvs.courses is the parent of bi.usdkzbvs.courses.

IP Addresses

usdkzbvs.courses resolves to four IPs: 2606:4700:3036::ac43:ad3f, 2606:4700:3037::6815:1ea6, 104.21.30.166 and 172.67.173.63.

Other host names, for instance mail.uruapan.gob.mx, diyibag.com, ponarethivoslan.com, gateguard.net and www.pcbxzy.com share IP numbers with usdkzbvs.courses.

Name Servers

usdkzbvs.courses has two name servers: alan.ns.cloudflare.com and nova.ns.cloudflare.com.

usdkzbvs.courses shares the same name server setup as other domains, for example djangos-net.de, agclassicexpo.com, rbvlqzam.digital, sh.org.pl and zrggmmif.work.

usdkzbvs.courses shares some name servers with other domains, for example gamephobias.com, thryjalabs.com, nlilhgz.com, cloudi360.com and russiam.org.

These name servers are often used together with rommy.ns.cloudflare.com, rudy.ns.cloudflare.com and remy.ns.cloudflare.com.

Host names with six IP numbers: alan.ns.cloudflare.com points to: 2606:4700:58::adf5:3b39, 2803:f800:50::6ca2:c139, 2a06:98c1:50::ac40:2139, 108.162.193.57, 172.64.33.57 and 173.245.59.57; nova.ns.cloudflare.com points to: 2606:4700:50::a29f:2681, 2803:f800:50::6ca2:c281, 2a06:98c1:50::ac40:2281, 108.162.194.129, 162.159.38.129 and 172.64.34.129.

usdkzbvs.courses - robtex.com