schoolofcode.io - dns.ninja

schoolofcode.io

DNSSEC⚠️ Not signed
A2606:4700:3033::ac43:aff2🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::6815:483c🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.72.60Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.175.242🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSnoah.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b85🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnoah.ns.cloudflare.com
A2803:f800:50::6ca2:c185🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRnoah.ns.cloudflare.com
A2a06:98c1:50::ac40:2185🇺🇸 Cloudflare2a06:98c1:50::/45
PTRnoah.ns.cloudflare.com
A108.162.193.133🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnoah.ns.cloudflare.com
A172.64.33.133🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnoah.ns.cloudflare.com
A173.245.59.133🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnoah.ns.cloudflare.com
NSrobin.ns.cloudflare.com
A2606:4700:50::adf5:3ada🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrobin.ns.cloudflare.com
A2803:f800:50::6ca2:c0da🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRrobin.ns.cloudflare.com
A2a06:98c1:50::ac40:20da🇺🇸 Cloudflare2a06:98c1:50::/45
PTRrobin.ns.cloudflare.com
A108.162.192.218🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrobin.ns.cloudflare.com
A172.64.32.218🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrobin.ns.cloudflare.com
A173.245.58.218🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrobin.ns.cloudflare.com
MXaspmx.l.google.com ⭐
A2607:f8b0:4004:c1d::1b🇺🇸 Google2607:f8b0:4004::/48
PTRww-in-f27.1e100.net
A142.250.31.26🇺🇸 Google142.250.31.0/24
PTRbj-in-f26.1e100.net
MXalt1.aspmx.l.google.com(5)
A2800:3f0:4003:c0f::1a🇨🇱 Google2800:3f0:4003::/48
A108.177.123.27🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f27.1e100.net
MXalt2.aspmx.l.google.com(5)
A2a00:1450:400b:c02::1a🇮🇪 Google2a00:1450:400b::/48
PTRdj-in-f26.1e100.net
A172.253.116.27🇺🇸 Google172.253.116.0/24
PTRdj-in-f27.1e100.net
MXalt3.aspmx.l.google.com(10)
A2a00:1450:4009:c0f::1a🇬🇧 Google2a00:1450:4009::/48
PTRyulhrs-in-f26.1e100.net
A192.178.223.27🇺🇸 Google192.178.223.0/24
PTRyulhrs-in-f27.1e100.net
MXalt4.aspmx.l.google.com(10)
A2a00:1450:400c:c23::1b🇧🇪 Google2a00:1450:400c::/48
PTRyubrupd-in-f27.1e100.net
A172.253.157.27🇺🇸 Google172.253.0.0/16
PTRyubrupd-in-f27.1e100.net
TXTv=spf1 include:_spf.google.com ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.72.60, 172.67.175.242
IPv6 hints2606:4700:3033::ac43:aff2, 2606:4700:3036::6815:483c
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=124, name=cloudflare-ech.com
SOAnoah.ns.cloudflare.comdns@cloudflare.com serial=2404810952

io

DNSSEC🔒 Signed (DS record present)
NSa0.nic.io ⭐
NSa2.nic.io
NSb0.nic.io
NSc0.nic.io
SOAa0.nic.iohostmaster@donuts.email serial=1782893991

Subdomains

ws.schoolofcode.io
www.schoolofcode.io

Same first word

schoolofcode.io
schoolofcode.com

Similar names

codeofschool.com

DNS History

17 records (11 active, 6 former)

2017201820192020202120222023202420252026NSnoah.ns.cloudflare.comrobin.ns.cloudflare.comns-1448.awsdns-53.orgns-1918.awsdns-47.co.ukns-60.awsdns-07.comns-995.awsdns-60.netMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comaspmx.l.google.comA104.21.72.60172.67.175.2422606:4700:3033::ac43:aff22606:4700:3036::6815:483c2606:4700:3035::ac43:aff254.231.131.84
●NSnoah.ns.cloudflare.com2026-04-06 → 2026-07-01 · 3 obs
○ 2016-12-08 19:16:10
● 2026-04-06 04:45:00
● 2026-07-01 08:53:30
○NSns-1448.awsdns-53.org2016-12-08 → 2016-12-08 · 3 obs
● 2016-12-08 19:16:10
○ 2026-04-06 04:45:00
○ 2026-07-01 08:53:30
○NSns-1918.awsdns-47.co.uk2016-12-08 → 2016-12-08 · 3 obs
● 2016-12-08 19:16:10
○ 2026-04-06 04:45:00
○ 2026-07-01 08:53:30
○NSns-60.awsdns-07.com2016-12-08 → 2016-12-08 · 3 obs
● 2016-12-08 19:16:10
○ 2026-04-06 04:45:00
○ 2026-07-01 08:53:30
○NSns-995.awsdns-60.net2016-12-08 → 2016-12-08 · 3 obs
● 2016-12-08 19:16:10
○ 2026-04-06 04:45:00
○ 2026-07-01 08:53:30
●NSrobin.ns.cloudflare.com2026-04-06 → 2026-07-01 · 3 obs
○ 2016-12-08 19:16:10
● 2026-04-06 04:45:00
● 2026-07-01 08:53:30
●MXalt1.aspmx.l.google.com2026-04-06 → 2026-07-01 · 2 obs
● 2026-04-06 04:45:00
● 2026-07-01 08:53:30
●MXalt2.aspmx.l.google.com2026-04-06 → 2026-07-01 · 2 obs
● 2026-04-06 04:45:00
● 2026-07-01 08:53:30
●MXalt3.aspmx.l.google.com2026-04-06 → 2026-07-01 · 2 obs
● 2026-04-06 04:45:00
● 2026-07-01 08:53:30
●MXalt4.aspmx.l.google.com2026-04-06 → 2026-07-01 · 2 obs
● 2026-04-06 04:45:00
● 2026-07-01 08:53:30
●MXaspmx.l.google.com2026-04-06 → 2026-07-01 · 2 obs
● 2026-04-06 04:45:00
● 2026-07-01 08:53:30
●A104.21.72.602026-04-06 → 2026-07-01 · 3 obs
○ 2016-12-08 19:16:10
● 2026-04-06 04:45:00
● 2026-07-01 08:53:30
●A172.67.175.2422026-04-06 → 2026-07-01 · 3 obs
○ 2016-12-08 19:16:10
● 2026-04-06 04:45:00
● 2026-07-01 08:53:30
●A2606:4700:3033::ac43:aff22026-06-22 → 2026-07-01 · 3 obs
○ 2026-05-08 12:19:08
● 2026-06-22 19:07:38
● 2026-07-01 08:53:30
○A2606:4700:3035::ac43:aff22026-04-06 → 2026-05-08 · 5 obs
○ 2016-12-08 19:16:10
● 2026-04-06 04:45:00
● 2026-05-08 12:19:08
○ 2026-06-22 19:07:38
○ 2026-07-01 08:53:30
●A2606:4700:3036::6815:483c2026-04-06 → 2026-07-01 · 3 obs
○ 2016-12-08 19:16:10
● 2026-04-06 04:45:00
● 2026-07-01 08:53:30
○A54.231.131.842016-12-08 → 2016-12-08 · 3 obs
● 2016-12-08 19:16:10
○ 2026-04-06 04:45:00
○ 2026-07-01 08:53:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
iob0.nic.io, a0.nic.io, a2.nic.io, c0.nic.io-
schoolofcode.ionoah.ns.cloudflare.com, robin.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.58.218

NS records: noah.ns.cloudflare.com, robin.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for schoolofcode.io (unsigned zone)

⏱️ Timing

Total: 426ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.72.60, 172.67.175.242
AAAA22606:4700:3036::6815:483c, 2606:4700:3033::ac43:aff2
NS2noah.ns.cloudflare.com, robin.ns.cloudflare.com
MX5aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...
TXT1v=spf1 include:_spf.google.com ~all
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1noah.ns.cloudflare.com dns.cloudflare.co

Analysis

Hierarchy

ws.schoolofcode.io and www.schoolofcode.io are both subdomains of schoolofcode.io.

IP Addresses

schoolofcode.io directs to four IP numbers, which are 104.21.72.60, 172.67.175.242, 2606:4700:3033::ac43:aff2 and 2606:4700:3036::6815:483c.

rekapi.com, egtslots.com, refit.pro and two other host names share IP numbers with schoolofcode.io.

Name Servers

schoolofcode.io is delegated to two name servers: noah.ns.cloudflare.com and robin.ns.cloudflare.com.

schoolofcode.io uses the same name servers as several other domains — among them sewcrazed.com, psadefense.com, shqiptv.net and two more.

There is at least partial name server overlap between schoolofcode.io and other domains — h0rrhc.com, danielsalexander.com, bsovtoken.com and two more among them.

These name servers are routinely deployed together with the name servers jill.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

noah.ns.cloudflare.com resolves to 108.162.193.133, 172.64.33.133, 173.245.59.133 and 3 other IP addresses.

robin.ns.cloudflare.com resolves to 108.162.192.218, 172.64.32.218, 173.245.58.218 and 3 other IP addresses.

Mail Servers

Five mail servers handle schoolofcode.io: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

schoolofcode.io has at least partial mail server overlap with other domains such as bonnaure.us, steelmagnoliasinc.org, tigerlilly.me and two more.

These mail servers commonly co-occur with mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and 3 others.

Hostnames that resolve to two IP addresses:

aspmx.l.google.com points to 142.250.31.26 and 2607:f8b0:4004:c1d::1b.

alt1.aspmx.l.google.com points to 108.177.123.27 and 2800:3f0:4003:c0f::1a.

alt2.aspmx.l.google.com points to 172.253.116.27 and 2a00:1450:400b:c02::1a.

alt3.aspmx.l.google.com points to 192.178.223.27 and 2a00:1450:4009:c0f::1a.

alt4.aspmx.l.google.com points to 172.253.157.27 and 2a00:1450:400c:c23::1b.