`responsiveclassroom.org`

DNSSEC	⚠️ Not signed
A	104.20.28.193 ✓ In HTTPS hints
A	172.66.144.212 ✓ In HTTPS hints
NS	`dilbert.ns.cloudflare.com` ⭐
NS	`nola.ns.cloudflare.com`
MX	`smtp.google.com` ⭐
TXT	`1b9gu7s4k5knnrmr45kjcp64r9`
TXT	`MS=E0F048F251CDC90B1ACC3D130A630214F53705F8`
TXT	`MS=ms19222530`
TXT	`MS=ms90914470`
TXT	`aghdtdspctjktqn09t661rjn7l`
TXT	`canva-site-verification=guKBAEKsIcc-8L4T2ZwtAQ`
TXT	`facebook-domain-verification=gockvvu8vf81djcam7qr3nulurrhn7`
TXT	`globalsign-domain-verification=iyd8vYP0-B9-YWBXSweqk77CaPoiw8mkPwuIx9X9X_`
TXT	`google-site-verification=VzXy5GYTPM95PeiDPpZkLNc-PVaVe6On0vo2AS1kTz4`
HTTPS	HTTP/2 ✓ hints match
		IPv4	104.20.28.193, 172.66.144.212
SOA	`dilbert.ns.cloudflare.com`dns@cloudflare.com serial=2398524599

`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=1771291736

rank #172893 globally
rank #13099 in the tld
WOT: UNKNOWN (66/100)
📈 Tranco rank: #484,164

Subdomains

www.responsiveclassroom.org

Same first word

responsiveclassroom.org

DNS History

17 records (5 active, 12 former)

●NSdilbert.ns.cloudflare.com2026-03-14 → 2026-03-14 · 3 obs

○ 2017-02-20 03:40:22
● 2026-03-14 08:43:16
● 2026-03-14 23:52:24

●NSnola.ns.cloudflare.com2026-03-14 → 2026-03-14 · 3 obs

○ 2017-02-20 03:40:22
● 2026-03-14 08:43:16
● 2026-03-14 23:52:24

○NSns1.blackmesh.com2015-07-23 → 2016-03-03 · 4 obs

● 2015-07-23 09:46:30
● 2016-03-03 09:45:20
○ 2016-07-10 21:58:22
○ 2026-03-14 23:52:24

○NSns2.blackmesh.com2015-07-23 → 2016-03-03 · 4 obs

● 2015-07-23 09:46:30
● 2016-03-03 09:45:20
○ 2016-07-10 21:58:22
○ 2026-03-14 23:52:24

○NSns75.worldnic.com2016-07-10 → 2017-02-20 · 5 obs

○ 2016-03-03 09:45:20
● 2016-07-10 21:58:22
● 2017-02-20 03:40:22
○ 2026-03-14 08:43:16
○ 2026-03-14 23:52:24

○NSns76.worldnic.com2016-07-10 → 2017-02-20 · 5 obs

○ 2016-03-03 09:45:20
● 2016-07-10 21:58:22
● 2017-02-20 03:40:22
○ 2026-03-14 08:43:16
○ 2026-03-14 23:52:24

○MXasp.reflexion.net2016-07-10 → 2017-02-20 · 5 obs

○ 2016-03-03 09:45:20
● 2016-07-10 21:58:22
● 2017-02-20 03:40:22
○ 2026-03-14 08:43:16
○ 2026-03-14 23:52:24

○MXmx-100.reflexion.net2016-07-10 → 2017-02-20 · 5 obs

○ 2016-03-03 09:45:20
● 2016-07-10 21:58:22
● 2017-02-20 03:40:22
○ 2026-03-14 08:43:16
○ 2026-03-14 23:52:24

○MXmx-110.reflexion.net2016-07-10 → 2017-02-20 · 5 obs

○ 2016-03-03 09:45:20
● 2016-07-10 21:58:22
● 2017-02-20 03:40:22
○ 2026-03-14 08:43:16
○ 2026-03-14 23:52:24

○MXresponsiveclassroom.org.inbound10.mxlogic.net2015-07-23 → 2016-03-03 · 4 obs

● 2015-07-23 09:46:30
● 2016-03-03 09:45:20
○ 2016-07-10 21:58:22
○ 2026-03-14 23:52:24

○MXresponsiveclassroom.org.inbound10.mxlogicmx.net2015-07-23 → 2016-03-03 · 4 obs

● 2015-07-23 09:46:30
● 2016-03-03 09:45:20
○ 2016-07-10 21:58:22
○ 2026-03-14 23:52:24

●MXsmtp.google.com2026-03-14 → 2026-03-14 · 3 obs

○ 2017-02-20 03:40:22
● 2026-03-14 08:43:16
● 2026-03-14 23:52:24

○A104.196.104.872017-02-20 → 2017-02-20 · 4 obs

○ 2016-07-10 21:58:22
● 2017-02-20 03:40:22
○ 2026-03-14 08:43:16
○ 2026-03-14 23:52:24

●A104.20.28.1932026-03-14 → 2026-03-14 · 3 obs

○ 2017-02-20 03:40:22
● 2026-03-14 08:43:16
● 2026-03-14 23:52:24

●A172.66.144.2122026-03-14 → 2026-03-14 · 3 obs

○ 2017-02-20 03:40:22
● 2026-03-14 08:43:16
● 2026-03-14 23:52:24

○A172.99.112.2252016-03-03 → 2016-07-10 · 5 obs

○ 2015-11-20 23:36:28
● 2016-03-03 09:45:20
● 2016-07-10 21:58:22
○ 2017-02-20 03:40:22
○ 2026-03-14 23:52:24

○A199.167.75.1222015-07-23 → 2015-11-20 · 4 obs

● 2015-07-23 09:46:30
● 2015-11-20 23:36:28
○ 2016-03-03 09:45:20
○ 2026-03-14 23:52:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
responsiveclassroom.org	dilbert.ns.cloudflare.com, nola.ns.cloudflare.com	-

✅ Authoritative Response

Server: 173.245.59.155

NS records: dilbert.ns.cloudflare.com, nola.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for responsiveclassroom.org (unsigned zone)

⏱️ Timing

Total: 1271ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.66.144.212, 104.20.28.193`
NS	2	`dilbert.ns.cloudflare.com, nola.ns.cloudflare.com`
MX	1	`smtp.google.com (pri: 1)`
TXT	9	`1b9gu7s4k5knnrmr45kjcp64r9, MS=E0F048F251CDC90B1ACC3D130A630214F5370...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h2"]`
SOA	1	`dilbert.ns.cloudflare.com dns.cloudflare`

Analysis

Hierarchy

The parent of www.responsiveclassroom.org is responsiveclassroom.org.

IP Addresses

responsiveclassroom.org points to two IP numbers: 104.20.28.193 and 172.66.144.212.

Name Servers

responsiveclassroom.org is delegated to two name servers: dilbert.ns.cloudflare.com and nola.ns.cloudflare.com.

Mail Servers

The mail server for responsiveclassroom.org is smtp.google.com.

responsiveclassroom.org - robtex.com