`systemdesignschool.io`

DNSSEC	⚠️ Not signed
A	216.150.1.1^{🇨🇦 Amazon216.150.1.0/24 EC2 Prefix}
NS	`drew.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3ba0^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`drew.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1a0^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`drew.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21a0^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`drew.ns.cloudflare.com`
		A	108.162.193.160^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`drew.ns.cloudflare.com`
		A	172.64.33.160^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`drew.ns.cloudflare.com`
		A	173.245.59.160^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`drew.ns.cloudflare.com`
NS	`tani.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ae0^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0e0^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`tani.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20e0^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`tani.ns.cloudflare.com`
		A	108.162.192.224^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
		A	172.64.32.224^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
		A	173.245.58.224^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
MX	`mx1.privateemail.com` ⭐
		A	162.255.118.7^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`mx1.privateemail.com`
MX	`mx2.privateemail.com` ⭐
		A	162.255.118.8^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`mx2.privateemail.com`
TXT	`firebase=systemdesignschool-io`
TXT	`google-site-verification=Yql90q2aL8RXKemW8UDR0R5izvYtk0ycKtfGHHmpZQQ`
TXT	`google-site-verification=r3VbO-sZR6PEIFs7xtu5wYUlUpHafCLjLr_VVcWklis`
TXT	`v=spf1 include:_spf.firebasemail.com ~all`
TXT	`v=spf1 include:_spf.mlsend.com include:spf.privateemail.com ~all`
SOA	`drew.ns.cloudflare.com`dns@cloudflare.com serial=2396616840

`io`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.nic.io` ⭐
	NS	`a2.nic.io`
	NS	`b0.nic.io`
	NS	`c0.nic.io`
	SOA	`a0.nic.io`hostmaster@donuts.email serial=1773494468

Same first word

systemdesignschool.io

DNS History

5 records (5 active, 0 former)

●NSdrew.ns.cloudflare.com2026-03-16 → 2026-03-22 · 2 obs

● 2026-03-16 21:52:56
● 2026-03-22 18:39:12

●NStani.ns.cloudflare.com2026-03-16 → 2026-03-22 · 2 obs

● 2026-03-16 21:52:56
● 2026-03-22 18:39:12

●MXmx1.privateemail.com2026-03-16 → 2026-03-22 · 2 obs

● 2026-03-16 21:52:56
● 2026-03-22 18:39:12

●MXmx2.privateemail.com2026-03-16 → 2026-03-22 · 2 obs

● 2026-03-16 21:52:56
● 2026-03-22 18:39:12

●A216.150.1.12026-03-16 → 2026-03-22 · 2 obs

● 2026-03-16 21:52:56
● 2026-03-22 18:39:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
io	a0.nic.io, a2.nic.io, b0.nic.io, c0.nic.io	-
systemdesignschool.io	tani.ns.cloudflare.com, drew.ns.cloudflare.com	-

✅ Authoritative Response

Server: 173.245.59.160

NS records: tani.ns.cloudflare.com, drew.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for systemdesignschool.io (unsigned zone)

⏱️ Timing

Total: 451ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`216.150.1.1`
NS	2	`drew.ns.cloudflare.com, tani.ns.cloudflare.com`
MX	2	`mx1.privateemail.com (pri: 10), mx2.privateemail.com (pri: 10)`
TXT	5	`firebase=systemdesignschool-io, google-site-verification=Yql90q2aL8RXKem...`
SOA	1	`drew.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

systemdesignschool.io points to a single IP number: 216.150.1.1.

Other host names, for instance viirus.fi, flicket-preview.com, exodusweb3wallet-eng.created.app, ahotels.com.au and moshealth.com share IP numbers with systemdesignschool.io.

Name Servers

systemdesignschool.io is delegated to two name servers: drew.ns.cloudflare.com and tani.ns.cloudflare.com.

systemdesignschool.io uses the same name server setup as other domains, for instance pool-service.nl, poolingpartners.sk, ipp-pallet-services.com, propertyequipment.com and seattleeyecaredoctor.com.

systemdesignschool.io shares name servers with other domains at least partially, for instance newgagolf.com, aed-blog.nl, far-away.com, 906bocai.com and shuangxiangzx.com.

Host names with six IP numbers: drew.ns.cloudflare.com points to 2606:4700:58::adf5:3ba0, 2803:f800:50::6ca2:c1a0, 2a06:98c1:50::ac40:21a0, 108.162.193.160, 172.64.33.160 and 173.245.59.160; tani.ns.cloudflare.com points to 2606:4700:50::adf5:3ae0, 2803:f800:50::6ca2:c0e0, 2a06:98c1:50::ac40:20e0, 108.162.192.224, 172.64.32.224 and 173.245.58.224.

Mail Servers

systemdesignschool.io is handled by two mail servers: mx1.privateemail.com and mx2.privateemail.com.

systemdesignschool.io shares the same mail server setup as other domains, including afriset.org, speedscan.ca, drveganblog.com, 5star-reviews.com and shotcost.com.

systemdesignschool.io shares at least some mail servers with other domains, for instance vexchange.io.

Host names with one IP number:

mx1.privateemail.com points to: 162.255.118.7.

mx2.privateemail.com points to: 162.255.118.8.

systemdesignschool.io - robtex.com