classclass2021.com - dns.ninja
classclass2021.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 160.251.71.19🇯🇵 GMO-INTERNET160.251.71.0/24 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan | ||||||
| PTR | www271.onamae.ne.jp | ||||||
| NS | ns-rs1.gmoserver.jp ⭐ | ||||||
| A | 157.7.32.87🇯🇵 GMO-DNS157.7.32.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | ns-rs1.gmoserver.jp | ||||||
| NS | ns-rs2.gmoserver.jp | ||||||
| A | 157.7.33.87🇯🇵 GMO-DNS157.7.33.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | ns-rs2.gmoserver.jp | ||||||
| MX | mx1027.onamae.ne.jp ⭐ | ||||||
| A | 160.251.148.176🇯🇵 GMOOSK-NET160.251.148.0/24 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan | ||||||
| PTR | mail1027.onamae.ne.jp | ||||||
| TXT | v=spf1 include:_spf.onamae.ne.jp ~all | ||||||
| TXT | v=spf1 include:_spf.google.com ~all | ||||||
| SOA | ns-rs1.gmoserver.jphostmaster@gmoserver.jp serial=1707981402 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1785913959 | ||||||
Same first word
classclass2021.com |
DNS History
4 records (4 active, 0 former)
●NSns-rs1.gmoserver.jp2026-06-13 → 2026-08-05 · 2 obs
● 2026-08-05 07:29:00
●NSns-rs2.gmoserver.jp2026-06-13 → 2026-08-05 · 2 obs
● 2026-08-05 07:29:00
●MXmx1027.onamae.ne.jp2026-06-13 → 2026-08-05 · 2 obs
● 2026-08-05 07:29:00
●A160.251.71.192026-06-13 → 2026-08-05 · 2 obs
● 2026-08-05 07:29:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | m.gtld-servers.net, f.gtld-servers.net, k.gtld-servers.net, h.gtld-servers.net... | - |
| classclass2021.com | ns-rs1.gmoserver.jp, ns-rs2.gmoserver.jp | - |
✅ Authoritative Response
Server:157.7.33.87
NS records: ns-rs1.gmoserver.jp, ns-rs2.gmoserver.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for classclass2021.com (unsigned zone)
⏱️ Timing
Total: 1077ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 160.251.71.19 |
| NS | 2 | ns-rs1.gmoserver.jp, ns-rs2.gmoserver.jp |
| MX | 1 | mx1027.onamae.ne.jp (pri: 10) |
| TXT | 2 | v=spf1 include:_spf.onamae.ne.jp ~all, v=spf1 include:_spf.google.com ~all |
| SOA | 1 | ns-rs1.gmoserver.jp hostmaster.gmoserver |
Analysis
IP Addresses
classclass2021.com points to a single IP number: 160.251.71.19.
Additional host names — www271.onamae.ne.jp, bayinfo.net, shoukouji.jp and two others — share IP numbers with classclass2021.com.
Name Servers
classclass2021.com has two authoritative name servers — ns-rs1.gmoserver.jp and ns-rs2.gmoserver.jp.
classclass2021.com shares its name server setup with other domains, including kk-kk.com, k-kss.com, kjss.co.jp and two others.
Both ns-rs1.gmoserver.jp and ns-rs2.gmoserver.jp have a single IP address each — ns-rs1.gmoserver.jp resolves to 157.7.32.87 while ns-rs2.gmoserver.jp resolves to 157.7.33.87.
Mail Servers
classclass2021.com has one mail server: mx1027.onamae.ne.jp.
classclass2021.com shares the same mail server setup as other domains, including mimura-setsubi.com, website02.net, preology.com and two others.
classclass2021.com shares mail servers — at least in part — with other domains, including greenocean.jp, jdraf.com, willsumtechnology.com and two others.
mx1027.onamae.ne.jp points to one IP number — 160.251.148.176.