programming.school - dns.ninja

programming.school

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:3a56🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:9e64🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.58.86Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.158.100🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSjihoon.ns.cloudflare.com ⭐
A2606:4700:58::a29f:2ce9🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjihoon.ns.cloudflare.com
A2803:f800:50::6ca2:c3e9🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRjihoon.ns.cloudflare.com
A2a06:98c1:50::ac40:23e9🇺🇸 Cloudflare2a06:98c1:50::/45
PTRjihoon.ns.cloudflare.com
A108.162.195.233🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjihoon.ns.cloudflare.com
A162.159.44.233Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjihoon.ns.cloudflare.com
A172.64.35.233🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjihoon.ns.cloudflare.com
NSmartha.ns.cloudflare.com
A2606:4700:50::a29f:268e🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmartha.ns.cloudflare.com
A2803:f800:50::6ca2:c28e🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRmartha.ns.cloudflare.com
A2a06:98c1:50::ac40:228e🇺🇸 Cloudflare2a06:98c1:50::/45
PTRmartha.ns.cloudflare.com
A108.162.194.142🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmartha.ns.cloudflare.com
A162.159.38.142Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmartha.ns.cloudflare.com
A172.64.34.142🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmartha.ns.cloudflare.com
MXaspmx.l.google.com ⭐
A2607:f8b0:4004:c21::1b🇺🇸 Google2607:f8b0:4004::/48
PTRpe-in-f27.1e100.net
A64.233.180.26🇺🇸 Google64.233.180.0/24
PTRon-in-f26.1e100.net
PTRpe-in-f26.1e100.net
MXalt1.aspmx.l.google.com(5)
A2800:3f0:4003:c0f::1a🇨🇱 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
A172.253.116.26🇺🇸 Google172.253.116.0/24
PTRdj-in-f26.1e100.net
MXalt3.aspmx.l.google.com(10)
A2a00:1450:4009:c0f::1b🇬🇧 Google2a00:1450:4009::/48
PTRyulhrs-in-f27.1e100.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
TXTZOOM_verify_2mzSsJVwRqi3fRhGHTXe_w
TXTgoogle-site-verification=HNDjaamdAoh2-PTFq4rTJwwKWV0c7UbW-BXySw47feo
TXTgoogle-site-verification=vUgmvsZd73OK0Y9bfdGQJwNivgRIrTnLGH9Nf5QAFtI
TXTv=spf1 include:_spf.mlsend.com include:one.zoho.com include:_spf.google.com ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.58.86, 172.67.158.100
IPv6 hints2606:4700:3032::6815:3a56, 2606:4700:3035::ac43:9e64
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=24, name=cloudflare-ech.com
SOAjihoon.ns.cloudflare.comdns@cloudflare.com serial=2407336429

school

DNSSEC🔒 Signed (DS record present)
NSv0n0.nic.school ⭐
NSv0n1.nic.school
NSv0n2.nic.school
NSv0n3.nic.school
NSv2n0.nic.school
NSv2n1.nic.school
SOAv0n0.nic.schoolhostmaster@donuts.email serial=1784890174

Subdomains

vn.programming.school

Same first word

programming.cl
programming.ch
programming.guru
programming.technology
programming.ph
programming.email
programming.my
programming.cc
programming.us
programming.at
programming.cn
programming.org
programming.guide
programming.in.th
programming.mobi
programming.pl
programming.im
programming.school
programming.lv
programming.monster
programming.academy
programming.com.cn
programming.hu
programming.gr
programming.tools
programming.run
programming.or.jp
programming.team
programming.zone
programming.in.ua
programming.asia
programming.center
programming.biz
programming.fail
programming.nu
programming.fr
programming.be
programming.ca
programming.in
programming.de
programming.tv
programming.systems
programming.fyi
programming.com.sg
programming.sa
programming.education
programming.dev
programming.es
programming.ru
programming.com

Similar names

porgramming.com

DNS History

13 records (11 active, 2 former)

NSjihoon.ns.cloudflare.commartha.ns.cloudflare.comMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comaspmx.l.google.comA104.21.58.86172.67.158.1002606:4700:3032::6815:3a562606:4700:3035::ac43:9e642606:4700:3031::ac43:9e642606:4700:3037::6815:3a56
●NSjihoon.ns.cloudflare.com2026-05-13 → 2026-07-24 · 2 obs
● 2026-05-13 16:09:34
● 2026-07-24 10:59:56
●NSmartha.ns.cloudflare.com2026-05-13 → 2026-07-24 · 2 obs
● 2026-05-13 16:09:34
● 2026-07-24 10:59:56
●MXalt1.aspmx.l.google.com2026-05-13 → 2026-07-24 · 2 obs
● 2026-05-13 16:09:34
● 2026-07-24 10:59:56
●MXalt2.aspmx.l.google.com2026-05-13 → 2026-07-24 · 2 obs
● 2026-05-13 16:09:34
● 2026-07-24 10:59:56
●MXalt3.aspmx.l.google.com2026-05-13 → 2026-07-24 · 2 obs
● 2026-05-13 16:09:34
● 2026-07-24 10:59:56
●MXalt4.aspmx.l.google.com2026-05-13 → 2026-07-24 · 2 obs
● 2026-05-13 16:09:34
● 2026-07-24 10:59:56
●MXaspmx.l.google.com2026-05-13 → 2026-07-24 · 2 obs
● 2026-05-13 16:09:34
● 2026-07-24 10:59:56
●A104.21.58.862026-05-13 → 2026-07-24 · 2 obs
● 2026-05-13 16:09:34
● 2026-07-24 10:59:56
●A172.67.158.1002026-05-13 → 2026-07-24 · 2 obs
● 2026-05-13 16:09:34
● 2026-07-24 10:59:56
○A2606:4700:3031::ac43:9e642026-05-13 → 2026-06-04 · 4 obs
● 2026-05-13 16:09:34
● 2026-06-04 20:12:04
○ 2026-06-30 18:25:02
○ 2026-07-24 10:59:56
●A2606:4700:3032::6815:3a562026-06-30 → 2026-07-24 · 3 obs
○ 2026-06-04 20:12:04
● 2026-06-30 18:25:02
● 2026-07-24 10:59:56
●A2606:4700:3035::ac43:9e642026-06-30 → 2026-07-24 · 3 obs
○ 2026-06-04 20:12:04
● 2026-06-30 18:25:02
● 2026-07-24 10:59:56
○A2606:4700:3037::6815:3a562026-05-13 → 2026-06-04 · 4 obs
● 2026-05-13 16:09:34
● 2026-06-04 20:12:04
○ 2026-06-30 18:25:02
○ 2026-07-24 10:59:56

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
schoolv0n0.nic.school, v0n1.nic.school, v0n2.nic.school, v0n3.nic.school...12 records
programming.schooljihoon.ns.cloudflare.com, martha.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.195.233

NS records: jihoon.ns.cloudflare.com, martha.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for programming.school (unsigned zone)

⏱️ Timing

Total: 445ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.58.86, 172.67.158.100
AAAA22606:4700:3032::6815:3a56, 2606:4700:3035::ac43:9e64
NS2jihoon.ns.cloudflare.com, martha.ns.cloudflare.com
MX5aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...
TXT4ZOOM_verify_2mzSsJVwRqi3fRhGHTXe_w, google-site-verification=HNDjaamdAoh2-PT...
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1jihoon.ns.cloudflare.com dns.cloudflare.

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (v0n0.nic.school, v0n1.nic.school, v0n2.nic.school...)

Analysis

Hierarchy

vn.programming.school is a subdomain of programming.school.

IP Addresses

programming.school points to the four IP addresses 104.21.58.86, 172.67.158.100, 2606:4700:3032::6815:3a56 and 2606:4700:3035::ac43:9e64.

Among the host names that share IP numbers with programming.school are wayfairofficesetup.com, strike-mish.com, api.thahabi.org and two others.

Name Servers

The NS records for programming.school delegate to jihoon.ns.cloudflare.com and martha.ns.cloudflare.com.

programming.school has the same name server delegation as a number of other domains, such as buscaplaya.com, netklinik.dk, agrosus.com and two more.

The name servers of programming.school overlap at least partially with those of other domains — among them sparkspace.us, olivann.net, 3356207189.workers.dev and two more.

The name servers duke.ns.cloudflare.com, nash.ns.cloudflare.com and blair.ns.cloudflare.com are commonly seen alongside these name servers.

Host names resolving to 6 IP numbers:

jihoon.ns.cloudflare.com maps to 108.162.195.233, 162.159.44.233, 172.64.35.233 and 3 additional IP addresses.

martha.ns.cloudflare.com maps to 108.162.194.142, 162.159.38.142, 172.64.34.142 and 3 additional IP addresses.

Mail Servers

programming.school has five mail servers, which are aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

programming.school shares at least some of its mail servers with other domains — for example flin.org, ns500765.ns500693.ns500734.ns500693.ns500693.ns500693.ns500693.ns500693.ns500693.ns500683.ns500693.ns500683.ns500699.ns500602.dtrkdll.com, ns500698.ns500758.ns500698.ns500758.ns500735.ns500735.ns500698.ns500698.ns500708.ns500698.ns500698.ns500652.ns500652.ns500619.trackreceptor.com and two more.

It is common to find these mail servers paired with mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and 3 more.

Hosts with two IP numbers each:

The A records for aspmx.l.google.com return 64.233.180.26 and 2607:f8b0:4004:c21::1b.

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

The A records for alt2.aspmx.l.google.com return 172.253.116.26 and 2a00:1450:400b:c02::1b.

The A records for alt3.aspmx.l.google.com return 192.178.223.27 and 2a00:1450:4009:c0f::1b.

The A records for alt4.aspmx.l.google.com return 172.253.157.27 and 2a00:1450:400c:c23::1b.