`21stccsi.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:bcb6^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3032::6815:3909^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.57.9^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.188.182^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`mary.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a86^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mary.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c086^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`mary.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2086^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`mary.ns.cloudflare.com`
		A	108.162.192.134^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mary.ns.cloudflare.com`
		A	172.64.32.134^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mary.ns.cloudflare.com`
		A	173.245.58.134^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mary.ns.cloudflare.com`
NS	`matias.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c49^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`matias.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c349^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`matias.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2349^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`matias.ns.cloudflare.com`
		A	108.162.195.73^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`matias.ns.cloudflare.com`
		A	162.159.44.73^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`matias.ns.cloudflare.com`
		A	172.64.35.73^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`matias.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.57.9, 172.67.188.182
		IPv6 hints	2606:4700:3031::ac43:bcb6, 2606:4700:3032::6815:3909
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=75, name=cloudflare-ech.com
SOA	`mary.ns.cloudflare.com`dns@cloudflare.com serial=2409615989

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1785975194

⚠️ On DNS blocklist: ultimate, ultimate.mini
WOT: UNKNOWN (68/100)

Subdomains

www.21stccsi.com

Same first word

21stccsi.com

DNS History

16 records (6 active, 10 former)

●NSmary.ns.cloudflare.com2026-07-26 → 2026-08-06 · 3 obs

○ 2016-12-09 15:56:44
● 2026-07-26 21:58:52
● 2026-08-06 00:14:56

●NSmatias.ns.cloudflare.com2026-07-26 → 2026-08-06 · 3 obs

○ 2016-12-09 15:56:44
● 2026-07-26 21:58:52
● 2026-08-06 00:14:56

○NSns1.bcentralhost.com2015-05-29 → 2016-12-09 · 4 obs

● 2015-05-29 18:04:30
● 2016-12-09 15:56:44
○ 2026-07-26 21:58:52
○ 2026-08-06 00:14:56

○NSns1.hostingsvcs.com2015-05-29 → 2016-12-09 · 4 obs

● 2015-05-29 18:04:30
● 2016-12-09 15:56:44
○ 2026-07-26 21:58:52
○ 2026-08-06 00:14:56

○NSns2.hostingsvcs.com2015-05-29 → 2016-12-09 · 4 obs

● 2015-05-29 18:04:30
● 2016-12-09 15:56:44
○ 2026-07-26 21:58:52
○ 2026-08-06 00:14:56

○NSns3.hostingsvcs.com2015-05-29 → 2016-12-09 · 4 obs

● 2015-05-29 18:04:30
● 2016-12-09 15:56:44
○ 2026-07-26 21:58:52
○ 2026-08-06 00:14:56

○NSns4.hostingsvcs.com2015-05-29 → 2016-12-09 · 4 obs

● 2015-05-29 18:04:30
● 2016-12-09 15:56:44
○ 2026-07-26 21:58:52
○ 2026-08-06 00:14:56

○MXmx1c28.concentric.com2015-05-29 → 2016-12-09 · 4 obs

● 2015-05-29 18:04:30
● 2016-12-09 15:56:44
○ 2026-07-26 21:58:52
○ 2026-08-06 00:14:56

○MXmx2c28.concentric.com2015-05-29 → 2016-12-09 · 4 obs

● 2015-05-29 18:04:30
● 2016-12-09 15:56:44
○ 2026-07-26 21:58:52
○ 2026-08-06 00:14:56

○MXmx3c28.concentric.com2015-05-29 → 2016-12-09 · 4 obs

● 2015-05-29 18:04:30
● 2016-12-09 15:56:44
○ 2026-07-26 21:58:52
○ 2026-08-06 00:14:56

○MXmx4c28.concentric.com2015-05-29 → 2016-12-09 · 4 obs

● 2015-05-29 18:04:30
● 2016-12-09 15:56:44
○ 2026-07-26 21:58:52
○ 2026-08-06 00:14:56

●A104.21.57.92026-07-26 → 2026-08-06 · 3 obs

○ 2016-12-09 15:56:44
● 2026-07-26 21:58:52
● 2026-08-06 00:14:56

●A172.67.188.1822026-07-26 → 2026-08-06 · 3 obs

○ 2016-12-09 15:56:44
● 2026-07-26 21:58:52
● 2026-08-06 00:14:56

●A2606:4700:3031::ac43:bcb62026-07-26 → 2026-08-06 · 3 obs

○ 2016-12-09 15:56:44
● 2026-07-26 21:58:52
● 2026-08-06 00:14:56

●A2606:4700:3032::6815:39092026-07-26 → 2026-08-06 · 3 obs

○ 2016-12-09 15:56:44
● 2026-07-26 21:58:52
● 2026-08-06 00:14:56

○A66.226.70.232015-05-29 → 2016-12-09 · 4 obs

● 2015-05-29 18:04:30
● 2016-12-09 15:56:44
○ 2026-07-26 21:58:52
○ 2026-08-06 00:14:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, g.gtld-servers.net, f.gtld-servers.net, i.gtld-servers.net...	-
21stccsi.com	mary.ns.cloudflare.com, matias.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.195.73

NS records: mary.ns.cloudflare.com, matias.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21stccsi.com (unsigned zone)

⏱️ Timing

Total: 240ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.188.182, 104.21.57.9`
AAAA	2	`2606:4700:3031::ac43:bcb6, 2606:4700:3032::6815:3909`
NS	2	`mary.ns.cloudflare.com, matias.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`mary.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (mary.ns.cloudflare.com, mary.ns.cloudflare.com, mary.ns.cloudflare.com...)

Analysis

Hierarchy

www.21stccsi.com is delegated beneath 21stccsi.com.

IP Addresses

21stccsi.com directs to four IP numbers, which are 104.21.57.9, 172.67.188.182, 2606:4700:3031::ac43:bcb6 and 2606:4700:3032::6815:3909.

jackpot-charm.org.uk, webformcreator.com, digimais.com and two other host names share IP numbers with 21stccsi.com.

Name Servers

21stccsi.com is delegated to two name servers: mary.ns.cloudflare.com and matias.ns.cloudflare.com.

21stccsi.com uses the same name servers as several other domains — among them greetings-earthling.com, adweekarcawards.com, ynext.net and two more.

There is at least partial name server overlap between 21stccsi.com and other domains — charlieeng.com, replicawatches.ink, onlinepokerny.com and two more among them.

These name servers frequently co-occur with the name servers carla.ns.cloudflare.com and thea.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

mary.ns.cloudflare.com resolves to 108.162.192.134, 172.64.32.134, 173.245.58.134 and 3 other IP addresses.

matias.ns.cloudflare.com resolves to 108.162.195.73, 162.159.44.73, 172.64.35.73 and 3 other IP addresses.

21stccsi.com - robtex.com

21stccsi.com

com

Subdomains

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

IP Addresses

Name Servers

`21stccsi.com`

`com`