masterclass.jp - dns.ninja
masterclass.jp
jp
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | z.dns.jp ⭐ | ||||||
| NS | a.dns.jp | ||||||
| NS | b.dns.jp | ||||||
| NS | c.dns.jp | ||||||
| NS | d.dns.jp | ||||||
| NS | e.dns.jp | ||||||
| NS | f.dns.jp | ||||||
| NS | g.dns.jp | ||||||
| NS | h.dns.jp | ||||||
| SOA | z.dns.jproot@dns.jp serial=1784832303 | ||||||
Same first word
Similar names
DNS History
11 records (11 active, 0 former)
●MXalt1.aspmx.l.google.com2015-08-18 → 2026-07-23 · 2 obs
● 2026-07-23 20:09:30
●MXalt2.aspmx.l.google.com2015-08-18 → 2026-07-23 · 2 obs
● 2026-07-23 20:09:30
●MXaspmx.l.google.com2015-08-18 → 2026-07-23 · 2 obs
● 2026-07-23 20:09:30
●MXaspmx2.googlemail.com2015-08-18 → 2026-07-23 · 2 obs
● 2026-07-23 20:09:30
●MXaspmx3.googlemail.com2015-08-18 → 2026-07-23 · 2 obs
● 2026-07-23 20:09:30
●MXaspmx4.googlemail.com2015-08-18 → 2026-07-23 · 2 obs
● 2026-07-23 20:09:30
●MXaspmx5.googlemail.com2015-08-18 → 2026-07-23 · 2 obs
● 2026-07-23 20:09:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| masterclass.jp | 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp | 7 records |
✅ Authoritative Response
Server:157.7.33.53
NS records: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for masterclass.jp (unsigned zone)
⏱️ Timing
Total: 1104ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | 01.dnsv.jp, 02.dnsv.jp... |
| MX | 7 | alt1.aspmx.l.google.com (pri: 20), alt2.aspmx.l.google.com (pri: 20)... |
| TXT | 2 | google-site-verification=qA_pRT9EpyCNROY, v=spf1 include:_spf.google.com ~all |
| SOA | 1 | 01.dnsv.jp hostmaster.dnsv.jp |
📌 Glue Records Collected
Total: 7
Out-of-bailiwick: 7 (01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp...)
Analysis
Name Servers
The authoritative name servers for masterclass.jp are 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp and 04.dnsv.jp.
At least some of masterclass.jp's name servers are shared with other domains, for example kanojo-collection.com, ippatsu.net, kaikoudou.jp and two more.
Hostnames that resolve to two IP addresses:
01.dnsv.jp resolves to 157.7.32.53 and 2400:8500:3300::53.
03.dnsv.jp resolves to 157.7.34.53 and 2400:8500:3000::53.
04.dnsv.jp resolves to 157.7.35.53 and 2400:8500:3fff::53.
Hosts with just one IP address:
02.dnsv.jp resolves to 157.7.33.53.
Mail Servers
masterclass.jp uses 7 mail servers for delivery: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and 4 other.
masterclass.jp has at least partial mail server overlap with other domains such as mccrawpllc.com, snowytrees.com, bherald.com and two more.
These mail servers commonly co-occur with mail servers aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and 3 others.
Hostnames that resolve to two IP addresses:
aspmx2.googlemail.com resolves to 108.177.123.27 and 2800:3f0:4003:c0f::1b.
aspmx3.googlemail.com resolves to 172.253.116.27 and 2a00:1450:400b:c02::1a.
aspmx4.googlemail.com resolves to 192.178.223.27 and 2a00:1450:4009:c0f::1a.
aspmx5.googlemail.com resolves to 172.253.157.26 and 2a00:1450:400c:c23::1a.
aspmx.l.google.com resolves to 172.253.122.26 and 2607:f8b0:4004:c21::1b.
alt1.aspmx.l.google.com resolves to 108.177.123.27 and 2800:3f0:4003:c0f::1a.
alt2.aspmx.l.google.com resolves to 172.253.116.27 and 2a00:1450:400b:c02::1a.
The host names aspmx2.googlemail.com and alt1.aspmx.l.google.com both resolve to 108.177.123.27 IP addresses.
The host names aspmx3.googlemail.com and alt2.aspmx.l.google.com both resolve to 2a00:1450:400b:c02::1a IP addresses.
The host names aspmx3.googlemail.com and alt2.aspmx.l.google.com both resolve to 172.253.116.27 IP addresses.