instructive.co - dns.ninja

instructive.co

DNSSEC⚠️ Not signed
A2606:4700:20::681a:a7e🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:20::681a:b7e🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:20::ac43:44f2🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.26.10.126Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.26.11.126Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.68.242🇺🇸 Cloudflare172.67.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSdante.ns.cloudflare.com ⭐
A2606:4700:58::a29f:2c0a🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdante.ns.cloudflare.com
A2803:f800:50::6ca2:c30a🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRdante.ns.cloudflare.com
A2a06:98c1:50::ac40:230a🇺🇸 Cloudflare2a06:98c1:50::/45
PTRdante.ns.cloudflare.com
A108.162.195.10🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdante.ns.cloudflare.com
A162.159.44.10Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdante.ns.cloudflare.com
A172.64.35.10🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdante.ns.cloudflare.com
NSlaylah.ns.cloudflare.com
A2606:4700:50::a29f:26e6🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlaylah.ns.cloudflare.com
A2803:f800:50::6ca2:c2e6🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRlaylah.ns.cloudflare.com
A2a06:98c1:50::ac40:22e6🇺🇸 Cloudflare2a06:98c1:50::/45
PTRlaylah.ns.cloudflare.com
A108.162.194.230🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlaylah.ns.cloudflare.com
A162.159.38.230Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlaylah.ns.cloudflare.com
A172.64.34.230🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlaylah.ns.cloudflare.com
MXsmtp.google.com ⭐
A2607:f8b0:4004:c08::1a🇺🇸 Google2607:f8b0:4004::/48
PTRbi-in-f26.1e100.net
A2607:f8b0:4004:c08::1b🇺🇸 Google2607:f8b0:4004::/48
PTRbi-in-f27.1e100.net
A2607:f8b0:4004:c23::1a🇺🇸 Google2607:f8b0:4004::/48
PTRyuiadrs-in-f26.1e100.net
A2607:f8b0:4004:c23::1b🇺🇸 Google2607:f8b0:4004::/48
PTRyuiadrs-in-f27.1e100.net
A142.251.179.27🇺🇸 Google142.251.179.0/24
PTRpd-in-f27.1e100.net
A172.253.63.26🇺🇸 Google172.253.63.0/24
PTRbi-in-f26.1e100.net
A172.253.63.27🇺🇸 Google172.253.63.0/24
PTRbi-in-f27.1e100.net
A192.178.155.26🇺🇸 Google192.178.155.0/24
PTRyuiadrs-in-f26.1e100.net
A192.178.155.27🇺🇸 Google192.178.155.0/24
PTRyuiadrs-in-f27.1e100.net
TXTgoogle-site-verification=znP6RcA89QW2b-NJN9SRC4GA3ZQjUkmmzccN242R-dI
HTTPSHTTP/2 ✓ hints match
IPv4 hints104.26.10.126, 104.26.11.126, 172.67.68.242
IPv6 hints2606:4700:20::681a:a7e, 2606:4700:20::681a:b7e, 2606:4700:20::ac43:44f2
SOAdante.ns.cloudflare.comdns@cloudflare.com serial=2405950049

co

DNSSEC🔒 Signed (DS record present)
NSns0.centralnic.net ⭐
NSa.registrydns.co
NSb.registrydns.co
NSc.registrydns.co
NSd.registrydns.co
SOAns0.centralnic.nethostmaster@centralnic.net serial=1759718123

Subdomains

class.instructive.co

Same first word

instructive.co
instructive.ru

DNS History

9 records (9 active, 0 former)

NSdante.ns.cloudflare.comlaylah.ns.cloudflare.comMXsmtp.google.comA104.26.10.126104.26.11.126172.67.68.2422606:4700:20::681a:a7e2606:4700:20::681a:b7e2606:4700:20::ac43:44f2
●NSdante.ns.cloudflare.com2026-05-04 → 2026-07-28 · 2 obs
● 2026-05-04 10:28:40
● 2026-07-28 03:50:18
●NSlaylah.ns.cloudflare.com2026-05-04 → 2026-07-28 · 2 obs
● 2026-05-04 10:28:40
● 2026-07-28 03:50:18
●MXsmtp.google.com2026-05-04 → 2026-07-28 · 2 obs
● 2026-05-04 10:28:40
● 2026-07-28 03:50:18
●A104.26.10.1262026-05-04 → 2026-07-28 · 2 obs
● 2026-05-04 10:28:40
● 2026-07-28 03:50:18
●A104.26.11.1262026-05-04 → 2026-07-28 · 2 obs
● 2026-05-04 10:28:40
● 2026-07-28 03:50:18
●A172.67.68.2422026-05-04 → 2026-07-28 · 2 obs
● 2026-05-04 10:28:40
● 2026-07-28 03:50:18
●A2606:4700:20::681a:a7e2026-05-04 → 2026-07-28 · 2 obs
● 2026-05-04 10:28:40
● 2026-07-28 03:50:18
●A2606:4700:20::681a:b7e2026-05-04 → 2026-07-28 · 2 obs
● 2026-05-04 10:28:40
● 2026-07-28 03:50:18
●A2606:4700:20::ac43:44f22026-05-04 → 2026-07-28 · 2 obs
● 2026-05-04 10:28:40
● 2026-07-28 03:50:18

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coc.registrydns.co, b.registrydns.co, d.registrydns.co, a.registrydns.co-
instructive.colaylah.ns.cloudflare.com, dante.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.195.10

NS records: laylah.ns.cloudflare.com, dante.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for instructive.co (unsigned zone)

⏱️ Timing

Total: 417ms | Queries: -

📄 Records

TypeCountSample Data
A3172.67.68.242, 104.26.10.126...
AAAA32606:4700:20::681a:b7e, 2606:4700:20::ac43:44f2...
NS2dante.ns.cloudflare.com, laylah.ns.cloudflare.com
MX1smtp.google.com (pri: 1)
TXT1google-site-verification=znP6RcA89QW2b-N
HTTPS1{"priority":1,"target":".","alpn":["h2"]
SOA1dante.ns.cloudflare.com dns.cloudflare.c

Analysis

Hierarchy

class.instructive.co is delegated beneath instructive.co.

IP Addresses

instructive.co points to 6 IP addresses, including 104.26.10.126, 104.26.11.126 and 172.67.68.242, plus 3 other.

dllme.com, stockfbjpsn.com, class.instructive.co plus two other host names have IP numbers in common with instructive.co.

Name Servers

instructive.co is delegated to two name servers: dante.ns.cloudflare.com and laylah.ns.cloudflare.com.

The name server configuration of instructive.co is shared with other domains, for instance mathspathway.com, boomcloud.com, boomcloudapps.com and two others.

There is at least partial name server overlap between instructive.co and other domains — farmacia-bienestar.com, congobourse.com, duva.us and two more among them.

The name servers venus.ns.cloudflare.com, eric.ns.cloudflare.com and dawn.ns.cloudflare.com are often found in combination with these name servers.

Hosts with 6 IP addresses each:

dante.ns.cloudflare.com resolves to 108.162.195.10, 162.159.44.10, 172.64.35.10 and 3 other IP addresses.

laylah.ns.cloudflare.com resolves to 108.162.194.230, 162.159.38.230, 172.64.34.230 and 3 other IP addresses.

Mail Servers

instructive.co uses one mail server — smtp.google.com.

The mail server setup of instructive.co matches that of other domains such as visualobsession.com.au, stellarstarttutoring.com, sbse.com.au and two others.

At least some of the mail servers used by instructive.co are shared with other domains: skpcs.com, cryptoradar.com, orthoptics.org and two others among them.

smtp.google.com has 9 IP addresses: 142.251.179.27, 172.253.63.26, 172.253.63.27 plus 6 more.