classes.io - dns.ninja

classes.io

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:41dd🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::ac43:c182🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.65.221Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.193.130🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NShank.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b74🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhank.ns.cloudflare.com
A2803:f800:50::6ca2:c174🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRhank.ns.cloudflare.com
A2a06:98c1:50::ac40:2174🇺🇸 Cloudflare2a06:98c1:50::/45
PTRhank.ns.cloudflare.com
A108.162.193.116🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhank.ns.cloudflare.com
A172.64.33.116🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhank.ns.cloudflare.com
A173.245.59.116🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhank.ns.cloudflare.com
NSrita.ns.cloudflare.com
A2606:4700:50::adf5:3a8c🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrita.ns.cloudflare.com
A2803:f800:50::6ca2:c08c🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRrita.ns.cloudflare.com
A2a06:98c1:50::ac40:208c🇺🇸 Cloudflare2a06:98c1:50::/45
PTRrita.ns.cloudflare.com
A108.162.192.140🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrita.ns.cloudflare.com
A172.64.32.140🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrita.ns.cloudflare.com
A173.245.58.140🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrita.ns.cloudflare.com
MXaspmx.l.google.com ⭐
A2607:f8b0:4004:c07::1b🇺🇸 Google2607:f8b0:4004::/48
PTRbc-in-f27.1e100.net
A142.251.111.26🇺🇸 Google142.251.111.0/24
PTRbk-in-f26.1e100.net
MXalt1.aspmx.l.google.com(5)
A2800:3f0:4003:c0f::1b🇨🇱 Google2800:3f0:4003::/48
A108.177.123.26🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f26.1e100.net
MXalt2.aspmx.l.google.com(5)
A2a00:1450:400b:c02::1b🇮🇪 Google2a00:1450:400b::/48
PTRdj-in-f27.1e100.net
A172.253.116.27🇺🇸 Google172.253.116.0/24
PTRdj-in-f27.1e100.net
MXaspmx2.googlemail.com(10)
A2800:3f0:4003:c0f::1a🇨🇱 Google2800:3f0:4003::/48
A108.177.123.27🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f27.1e100.net
MXaspmx3.googlemail.com(10)
A2a00:1450:400b:c02::1b🇮🇪 Google2a00:1450:400b::/48
PTRdj-in-f27.1e100.net
A172.253.116.26🇺🇸 Google172.253.116.0/24
PTRdj-in-f26.1e100.net
TXTgoogle-site-verification=bs6Lfl9-243OmryM8bkq8Sw_p1l1lTuS_ebuIsc0w68
TXTv=spf1 a mx ip4:67.208.38.23 ?all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.65.221, 172.67.193.130
IPv6 hints2606:4700:3031::6815:41dd, 2606:4700:3031::ac43:c182
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=28, name=cloudflare-ech.com
SOAhank.ns.cloudflare.comdns@cloudflare.com serial=2405794617

io

DNSSEC🔒 Signed (DS record present)
NSa0.nic.io ⭐
NSa2.nic.io
NSb0.nic.io
NSc0.nic.io
SOAa0.nic.iohostmaster@donuts.email serial=1781932526

Same first word

classes.com.au
classes.com
classes.ng
classes.net
classes.life
classes.com.br
classes.ws
classes.org
classes.se
classes.dance
classes.us
classes.ch
classes.miami
classes.ru
classes.at
classes.io
classes.com.hk
classes.guru
classes.ie
classes.ca
classes.me
classes.eu
classes.co.il
classes.university
classes.training
classes.de

Similar names

esclass.cn
cassels.ca
cassels.us
cassels.nz
cassels.me
cassels.se
scaless.com
cassels.net
cassels.co.nz
esclass.com
salescs.com
esclass.net
casessl.com
cassels.com
seclass.com
cssales.com
cssales.co.uk
lessacs.fr
sealssc.com
cassels.org
cesslas.com
cassels.tv
lessacs.com

DNS History

11 records (11 active, 0 former)

201820192020202120222023202420252026NShank.ns.cloudflare.comrita.ns.cloudflare.comMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx.l.google.comaspmx2.googlemail.comaspmx3.googlemail.comA104.21.65.221172.67.193.1302606:4700:3031::6815:41dd2606:4700:3031::ac43:c182
●NShank.ns.cloudflare.com2017-03-16 → 2026-06-20 · 2 obs
● 2017-03-16 18:05:16
● 2026-06-20 05:28:52
●NSrita.ns.cloudflare.com2017-03-16 → 2026-06-20 · 2 obs
● 2017-03-16 18:05:16
● 2026-06-20 05:28:52
●MXalt1.aspmx.l.google.com2026-05-03 → 2026-06-20 · 2 obs
● 2026-05-03 05:32:24
● 2026-06-20 05:28:52
●MXalt2.aspmx.l.google.com2026-05-03 → 2026-06-20 · 2 obs
● 2026-05-03 05:32:24
● 2026-06-20 05:28:52
●MXaspmx.l.google.com2026-05-03 → 2026-06-20 · 2 obs
● 2026-05-03 05:32:24
● 2026-06-20 05:28:52
●MXaspmx2.googlemail.com2026-05-03 → 2026-06-20 · 2 obs
● 2026-05-03 05:32:24
● 2026-06-20 05:28:52
●MXaspmx3.googlemail.com2026-05-03 → 2026-06-20 · 2 obs
● 2026-05-03 05:32:24
● 2026-06-20 05:28:52
●A104.21.65.2212026-05-03 → 2026-06-20 · 2 obs
● 2026-05-03 05:32:24
● 2026-06-20 05:28:52
●A172.67.193.1302026-05-03 → 2026-06-20 · 2 obs
● 2026-05-03 05:32:24
● 2026-06-20 05:28:52
●A2606:4700:3031::6815:41dd2026-05-03 → 2026-06-20 · 2 obs
● 2026-05-03 05:32:24
● 2026-06-20 05:28:52
●A2606:4700:3031::ac43:c1822026-05-03 → 2026-06-20 · 2 obs
● 2026-05-03 05:32:24
● 2026-06-20 05:28:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
ioa0.nic.io, a2.nic.io, b0.nic.io, c0.nic.io-
classes.iorita.ns.cloudflare.com, hank.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.32.140

NS records: rita.ns.cloudflare.com, hank.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classes.io (unsigned zone)

⏱️ Timing

Total: 553ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.193.130, 104.21.65.221
AAAA22606:4700:3031::ac43:c182, 2606:4700:3031::6815:41dd
NS2hank.ns.cloudflare.com, rita.ns.cloudflare.com
MX5aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)...
TXT2google-site-verification=bs6Lfl9-243Omry, v=spf1 a mx ip4:67.208.38.23 ?all
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1hank.ns.cloudflare.com dns.cloudflare.co

Analysis

IP Addresses

classes.io resolves to four IP addresses: 104.21.65.221, 172.67.193.130, 2606:4700:3031::6815:41dd and 2606:4700:3031::ac43:c182.

fcxuvcwajfrhp.space, www.fcxuvcwajfrhp.space, sinoheavyvehicles.com and two other host names share IP numbers with classes.io.

Name Servers

The NS records for classes.io delegate to hank.ns.cloudflare.com and rita.ns.cloudflare.com.

classes.io uses the same name servers as several other domains — among them dinomartin.com, legoapi.com, tellyhd.com and two more.

classes.io partially shares its NS delegation with several other domains, including cesal.org.tr, siribukuislamik.com, ctvlikesub.net and two others.

The name servers elly.ns.cloudflare.com, andy.ns.cloudflare.com, rose.ns.cloudflare.com and ivy.ns.cloudflare.com are often found in use alongside these name servers.

Hostnames that resolve to 6 IP addresses:

hank.ns.cloudflare.com maps to 108.162.193.116, 172.64.33.116, 173.245.59.116 and 3 additional IP addresses.

rita.ns.cloudflare.com maps to 108.162.192.140, 172.64.32.140, 173.245.58.140 and 3 additional IP addresses.

Mail Servers

classes.io is handled by five mail servers: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.

classes.io has at least partial mail server overlap with other domains such as ns500794.ns500794.ns500821.ns500795.ns500821.ns500821.ns500821.ns500821.ns500795.ns500794.ns500794.ns500795.ns500790.ns500795.lustypartnersfinder.com, wivo.co.il, ns500671.ns500742.ns500754.ns500671.ns500731.ns500688.ns500671.ns500688.ns500671.ns500688.tenderladiesbz.com and two more.

These mail servers commonly co-occur with mail servers alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 others.

Hostnames that resolve to two IP addresses:

The A records for aspmx2.googlemail.com return 108.177.123.27 and 2800:3f0:4003:c0f::1a.

The A records for aspmx3.googlemail.com return 172.253.116.26 and 2a00:1450:400b:c02::1b.

The A records for aspmx.l.google.com return 142.251.111.26 and 2607:f8b0:4004:c07::1b.

The A records for alt1.aspmx.l.google.com return 108.177.123.26 and 2800:3f0:4003:c0f::1b.

The A records for alt2.aspmx.l.google.com return 172.253.116.27 and 2a00:1450:400b:c02::1b.

aspmx3.googlemail.com and alt2.aspmx.l.google.com each have 2a00:1450:400b:c02::1b IP addresses.