mx621.com - dns.ninja

`mx621.com`

DNSSEC	⚠️ Not signed
A	104.21.68.244^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.200.73^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`kareem.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c16^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kareem.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c316^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`kareem.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2316^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`kareem.ns.cloudflare.com`
		A	108.162.195.22^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kareem.ns.cloudflare.com`
		A	162.159.44.22^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kareem.ns.cloudflare.com`
		A	172.64.35.22^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kareem.ns.cloudflare.com`
NS	`katja.ns.cloudflare.com`
		A	2606:4700:50::a29f:2635^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`katja.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c235^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`katja.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2235^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`katja.ns.cloudflare.com`
		A	108.162.194.53^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`katja.ns.cloudflare.com`
		A	162.159.38.53^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`katja.ns.cloudflare.com`
		A	172.64.34.53^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`katja.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.68.244, 172.67.200.73
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=86, name=cloudflare-ech.com
SOA	`kareem.ns.cloudflare.com`dns@cloudflare.com serial=2410527690

`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=1785960219

Same first word

mx621.com

DNS History

7 records (4 active, 3 former)

●NSkareem.ns.cloudflare.com2026-03-23 → 2026-08-05 · 3 obs

○ 2019-04-19 10:24:54
● 2026-03-23 15:25:12
● 2026-08-05 20:04:46

●NSkatja.ns.cloudflare.com2026-03-23 → 2026-08-05 · 3 obs

○ 2019-04-19 10:24:54
● 2026-03-23 15:25:12
● 2026-08-05 20:04:46

○NSns1.22.cn2019-04-19 → 2019-04-19 · 3 obs

● 2019-04-19 10:24:54
○ 2026-03-23 15:25:12
○ 2026-08-05 20:04:46

○NSns2.22.cn2019-04-19 → 2019-04-19 · 3 obs

● 2019-04-19 10:24:54
○ 2026-03-23 15:25:12
○ 2026-08-05 20:04:46

●A104.21.68.2442026-03-23 → 2026-08-05 · 2 obs

● 2026-03-23 15:25:12
● 2026-08-05 20:04:46

●A172.67.200.732026-03-23 → 2026-08-05 · 2 obs

● 2026-03-23 15:25:12
● 2026-08-05 20:04:46

○CNAMEsyg.cdn-discuz.com2019-04-19 → 2019-04-19 · 3 obs

● 2019-04-19 10:24:54
○ 2026-03-23 15:25:12
○ 2026-08-05 20:04:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
mx621.com	katja.ns.cloudflare.com, kareem.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.53

NS records: katja.ns.cloudflare.com, kareem.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mx621.com (unsigned zone)

⏱️ Timing

Total: 867ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.200.73, 104.21.68.244`
NS	2	`kareem.ns.cloudflare.com, katja.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`kareem.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

mx621.com has two IP addresses: 104.21.68.244 and 172.67.200.73

Additional host names — 1761bb.com, www.mlxyz.com, atualizei.co and two others — share IP numbers with mx621.com.

Name Servers

Two name servers handle the delegation for mx621.com: kareem.ns.cloudflare.com and katja.ns.cloudflare.com.

mx621.com shares its name server setup with other domains, including mxapp51.com, mx256.com, hgkwxnfs.com and two others.

At least some of mx621.com's name servers are shared with other domains, for example ict-intl.com, bazynga.net, bazgus.com and two more.

These name servers tend to be used in conjunction with the name servers liz.ns.cloudflare.com.

Host names with 6 IP numbers:

kareem.ns.cloudflare.com resolves to 108.162.195.22, 162.159.44.22 and 172.64.35.22 among others, with 3 other IP addresses in total.

katja.ns.cloudflare.com resolves to 108.162.194.53, 162.159.38.53 and 172.64.34.53 among others, with 3 other IP addresses in total.