teachcomputing.org - dns.ninja

`teachcomputing.org`

DNSSEC	🔒 Signed (DS record present)
A	2606:4700:20::681a:c1a^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:20::681a:d1a^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:20::ac43:4b05^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.26.12.26^{Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.26.13.26^{Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.75.5^{🇺🇸 Cloudflare172.67.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`art.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b66^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c166^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`art.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2166^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`art.ns.cloudflare.com`
		A	108.162.193.102^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
		A	172.64.33.102^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
		A	173.245.59.102^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
NS	`tegan.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ae2^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tegan.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0e2^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`tegan.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20e2^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`tegan.ns.cloudflare.com`
		A	108.162.192.226^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tegan.ns.cloudflare.com`
		A	172.64.32.226^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tegan.ns.cloudflare.com`
		A	173.245.58.226^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tegan.ns.cloudflare.com`
MX	`cust40667-1.in.mailcontrol.com` ⭐
		A	85.115.52.190^{🇬🇧 Forcepoint-Cloud-AS85.115.52.0/24 Forcepoint Cloud London LONA}
			PTR	`cluster-a.mailcontrol.com`
MX	`cust40667-2.in.mailcontrol.com`⁽²⁰⁾
		A	85.115.54.190^{🇬🇧 Forcepoint-Cloud-AS85.115.54.0/24 Forcepoint Cloud London LONJ}
			PTR	`cluster-j.mailcontrol.com`
TXT	`MS=ms67343834`
TXT	`cookieyes-site-verification=fH2rX7qLmD-Tv9bC3WpJs-Yk5Mn1GaRe-Lz8Qw6VhKp`
TXT	`google-site-verification=VMO4jciYZTYAbFMOdDqmtR1Fb8SI8V4Yr5hog0Ky6cw`
TXT	`google-site-verification=YGwNM9f2b77Xm5030F7RmH6BbB9jjntIuq6bu3vxXas`
TXT	`google-site-verification=b-QZMrG5-euJsb-xSay98HRzCTQUOm-TjOb7MFSwGB4`
TXT	`v=spf1 include:msgfocus.com include:mailcontrol.com include:spf.mandrillapp.c...`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.26.12.26, 104.26.13.26, 172.67.75.5
		IPv6 hints	2606:4700:20::681a:c1a, 2606:4700:20::681a:d1a, 2606:4700:20::ac43:4b05
SOA	`art.ns.cloudflare.com`dns@cloudflare.com serial=2407057154

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1782101609

rank #350549 globally
rank #26542 in the tld
📈 Tranco rank: #705,666

Same first word

teachcomputing.org

DNS History

14 records (10 active, 4 former)

●NSart.ns.cloudflare.com2018-11-09 → 2026-06-22 · 2 obs

● 2018-11-09 15:21:16
● 2026-06-22 04:33:52

●NStegan.ns.cloudflare.com2018-11-09 → 2026-06-22 · 2 obs

● 2018-11-09 15:21:16
● 2026-06-22 04:33:52

●MXcust40667-1.in.mailcontrol.com2018-11-09 → 2026-06-22 · 2 obs

● 2018-11-09 15:21:16
● 2026-06-22 04:33:52

●MXcust40667-2.in.mailcontrol.com2018-11-09 → 2026-06-22 · 2 obs

● 2018-11-09 15:21:16
● 2026-06-22 04:33:52

○A104.18.48.462018-11-09 → 2018-11-09 · 3 obs

● 2018-11-09 15:21:16
○ 2026-02-17 09:24:34
○ 2026-06-22 04:33:52

○A104.18.49.462018-11-09 → 2018-11-09 · 3 obs

● 2018-11-09 15:21:16
○ 2026-02-17 09:24:34
○ 2026-06-22 04:33:52

●A104.26.12.262026-02-17 → 2026-06-22 · 3 obs

○ 2018-11-09 15:21:16
● 2026-02-17 09:24:34
● 2026-06-22 04:33:52

●A104.26.13.262026-02-17 → 2026-06-22 · 3 obs

○ 2018-11-09 15:21:16
● 2026-02-17 09:24:34
● 2026-06-22 04:33:52

●A172.67.75.52026-02-17 → 2026-06-22 · 3 obs

○ 2018-11-09 15:21:16
● 2026-02-17 09:24:34
● 2026-06-22 04:33:52

●A2606:4700:20::681a:c1a2026-02-17 → 2026-06-22 · 3 obs

○ 2018-11-09 15:21:16
● 2026-02-17 09:24:34
● 2026-06-22 04:33:52

●A2606:4700:20::681a:d1a2026-02-17 → 2026-06-22 · 3 obs

○ 2018-11-09 15:21:16
● 2026-02-17 09:24:34
● 2026-06-22 04:33:52

●A2606:4700:20::ac43:4b052026-02-17 → 2026-06-22 · 3 obs

○ 2018-11-09 15:21:16
● 2026-02-17 09:24:34
● 2026-06-22 04:33:52

○A2606:4700:30::6812:302e2018-11-09 → 2018-11-09 · 3 obs

● 2018-11-09 15:21:16
○ 2026-02-17 09:24:34
○ 2026-06-22 04:33:52

○A2606:4700:30::6812:312e2018-11-09 → 2018-11-09 · 3 obs

● 2018-11-09 15:21:16
○ 2026-02-17 09:24:34
○ 2026-06-22 04:33:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, d0.org.afilias-nst.org, b2.org.afilias-nst.org	-
teachcomputing.org	tegan.ns.cloudflare.com, art.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.102

NS records: tegan.ns.cloudflare.com, art.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 661ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`104.26.13.26, 172.67.75.5...`
AAAA	3	`2606:4700:20::681a:d1a, 2606:4700:20::ac43:4b05...`
NS	2	`art.ns.cloudflare.com, tegan.ns.cloudflare.com`
MX	2	`cust40667-1.in.mailcontrol.com (pri: 10), cust40667-2.in.mailcontrol.com (pri: 20)`
TXT	6	`MS=ms67343834, cookieyes-site-verification=fH2rX7qLmD-T...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h2"]`
SOA	1	`art.ns.cloudflare.com dns.cloudflare.com`

Analysis

IP Addresses

teachcomputing.org resolves to 6 IP numbers: 104.26.12.26, 104.26.13.26, 172.67.75.5 and 3 other.

Additional host names — purelypt.telkomuniversity.ac.id, btp-dev-c9.telkomuniversity.ac.id, arkanosoft.com and two others — share IP numbers with teachcomputing.org.

Name Servers

Two name servers handle the delegation for teachcomputing.org: art.ns.cloudflare.com and tegan.ns.cloudflare.com.

teachcomputing.org shares its name server setup with other domains, including camarao.io, vnchannel.net, bos5000one.com and two others.

There is at least partial name server overlap between teachcomputing.org and other domains — lastentori.com, llharpist.com, axxonsoft.dev and two more among them.

These name servers frequently co-occur with the name servers mustafa.ns.cloudflare.com and lakas.ns.cloudflare.com.

Host names with 6 IP numbers:

art.ns.cloudflare.com resolves to 108.162.193.102, 172.64.33.102 and 173.245.59.102 among others, with 3 other IP addresses in total.

tegan.ns.cloudflare.com resolves to 108.162.192.226, 172.64.32.226 and 173.245.58.226 among others, with 3 other IP addresses in total.

Mail Servers

teachcomputing.org has two mail servers: cust40667-1.in.mailcontrol.com and cust40667-2.in.mailcontrol.com.

cust40667-1.in.mailcontrol.com → 85.115.52.190 and cust40667-2.in.mailcontrol.com → 85.115.54.190: one IP number per host name.