programming.school - dns.ninja
programming.school
school
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | v0n0.nic.school ⭐ | ||||||
| NS | v0n1.nic.school | ||||||
| NS | v0n2.nic.school | ||||||
| NS | v0n3.nic.school | ||||||
| NS | v2n0.nic.school | ||||||
| NS | v2n1.nic.school | ||||||
| SOA | v0n0.nic.schoolhostmaster@donuts.email serial=1780603126 | ||||||
Subdomains
vn.programming.school |
Same first word
Similar names
DNS History
11 records (11 active, 0 former)
●NSjihoon.ns.cloudflare.com2026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
●NSmartha.ns.cloudflare.com2026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
●MXalt1.aspmx.l.google.com2026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
●MXalt2.aspmx.l.google.com2026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
●MXalt3.aspmx.l.google.com2026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
●MXalt4.aspmx.l.google.com2026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
●MXaspmx.l.google.com2026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
●A104.21.58.862026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
●A172.67.158.1002026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
●A2606:4700:3031::ac43:9e642026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
●A2606:4700:3037::6815:3a562026-05-13 → 2026-06-04 · 2 obs
● 2026-06-04 20:12:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| school | v0n0.nic.school, v2n0.nic.school, v0n2.nic.school, v0n3.nic.school... | 12 records |
| programming.school | martha.ns.cloudflare.com, jihoon.ns.cloudflare.com | - |
✅ Authoritative Response
Server:108.162.194.142
NS records: martha.ns.cloudflare.com, jihoon.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for programming.school (unsigned zone)
⏱️ Timing
Total: 502ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.58.86, 172.67.158.100 |
| AAAA | 2 | 2606:4700:3031::ac43:9e64, 2606:4700:3037::6815:3a56 |
| NS | 2 | jihoon.ns.cloudflare.com, martha.ns.cloudflare.com |
| MX | 5 | aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)... |
| TXT | 4 | ZOOM_verify_2mzSsJVwRqi3fRhGHTXe_w, google-site-verification=HNDjaamdAoh2-PT... |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | jihoon.ns.cloudflare.com dns.cloudflare. |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (v2n1.nic.school, v2n0.nic.school, v0n3.nic.school...)
Analysis
Hierarchy
vn.programming.school is a subdomain of programming.school.
IP Addresses
With 4 IP addresses, programming.school directs to 104.21.58.86, 172.67.158.100, 2606:4700:3031::ac43:9e64 and 2606:4700:3037::6815:3a56.
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.
These name servers commonly appear alongside the name servers duke.ns.cloudflare.com and nash.ns.cloudflare.com.
Host names resolving to 6 IP numbers:
jihoon.ns.cloudflare.com resolves to 108.162.195.233, 162.159.44.233 and 172.64.35.233, along with three other IP addresses.
martha.ns.cloudflare.com resolves to 108.162.194.142, 162.159.38.142 and 172.64.34.142, along with three other IP addresses.
Mail Servers
programming.school uses 5 mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com plus two additional ones.
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.
These mail servers tend to co-occur with alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and three additional mail servers.
Hosts with two IP numbers each:
The A records for aspmx.l.google.com return 173.194.45.27 and 2607:f8b0:4004:c23::1a.
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 172.253.116.26 and 2a00:1450:400b:c02::1b.
The A records for alt3.aspmx.l.google.com return 192.178.223.26 and 2a00:1450:4009:c0f::1a.
The A records for alt4.aspmx.l.google.com return 173.194.76.27 and 2a00:1450:400c:c00::1a.