first-s.net - robtex.com
first-s.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 160.251.229.82🇯🇵 GMOOSK-NET160.251.229.0/24 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan | ||||||
| PTR | www.gmoserver.jp | ||||||
| NS | dns01.gmoserver.jp ⭐ | ||||||
| A | 157.7.33.81🇯🇵 GMO-DNS157.7.33.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | dns01.gmoserver.jp | ||||||
| NS | dns02.gmoserver.jp | ||||||
| A | 157.7.34.81🇯🇵 GMO-DNS157.7.34.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | dns02.gmoserver.jp | ||||||
| MX | mx.first-s.net ⭐ | ||||||
| A | 160.251.229.91🇯🇵 GMOOSK-NET160.251.229.0/24 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan | ||||||
| PTR | mx-05.gmoserver.jp | ||||||
| TXT | v=spf1 include:spf.gmoserver.jp ~all | ||||||
| SOA | dns01.gmoserver.jphostmaster@first-s.net 2019-05-25 #7 | ||||||
net
| 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=1774373227 | ||||||
Subdomains
mx.first-s.net |
Same first word
DNS History
5 records (4 active, 1 former)
●NSdns01.gmoserver.jp2015-05-09 → 2026-03-24 · 2 obs
● 2026-03-24 17:49:06
●NSdns02.gmoserver.jp2015-05-09 → 2026-03-24 · 2 obs
● 2026-03-24 17:49:06
●MXmx.first-s.net2015-05-09 → 2026-03-24 · 2 obs
● 2026-03-24 17:49:06
○A157.7.144.52015-05-09 → 2017-04-10 · 4 obs
● 2017-04-10 12:04:56
○ 2026-03-22 01:33:18
○ 2026-03-24 17:49:06
●A160.251.229.822026-03-22 → 2026-03-24 · 3 obs
● 2026-03-22 01:33:18
● 2026-03-24 17:49:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| first-s.net | dns01.gmoserver.jp, dns02.gmoserver.jp | - |
✅ Authoritative Response
Server:157.7.33.81
NS records: dns01.gmoserver.jp, dns02.gmoserver.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for first-s.net (unsigned zone)
⏱️ Timing
Total: 979ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 160.251.229.82 |
| NS | 2 | dns01.gmoserver.jp, dns02.gmoserver.jp |
| MX | 1 | mx.first-s.net (pri: 10) |
| TXT | 1 | v=spf1 include:spf.gmoserver.jp ~all |
| SOA | 1 | dns01.gmoserver.jp hostmaster.first-s.ne |
Analysis
Hierarchy
mx.first-s.net is a child of first-s.net.
IP Addresses
first-s.net resolves to one IP number: 160.251.229.82.
Other host names, for instance sachkura.com, kfx.jp, ecton.net, cm-office.com and douis.com share IP numbers with first-s.net.
Name Servers
first-s.net's delegation uses two name servers: dns01.gmoserver.jp and dns02.gmoserver.jp.
first-s.net uses the same name server setup as other domains, such as duo-paa.jp, o-cho.com, grandslife.com, consuloffice.com and sayakan.com.
first-s.net shares name servers with other domains at least partially, for example raifuku.info, dainan.info and afjg-japon.com.
Host names with a single IP address: dns01.gmoserver.jp points to 157.7.33.81; dns02.gmoserver.jp points to 157.7.34.81.
Mail Servers
A single mail server handles first-s.net, mx.first-s.net.
Host name mx.first-s.net resolves to a single IP: 160.251.229.91.