mx.first-s.net - robtex.com
mx.first-s.net
| DNSSEC | ⚠️ Not signed | ||||||
| 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 | ||||||
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 | ||||||
| NS | dns01.gmoserver.jp ⭐ | ||||||
| NS | dns02.gmoserver.jp | ||||||
| MX | mx.first-s.net ⭐ | ||||||
| TXT | v=spf1 include:spf.gmoserver.jp ~all | ||||||
| SOA | dns01.gmoserver.jphostmaster@first-s.net 2019-05-25 #7 | ||||||
MX for
Same first word
Similar names
DNS History
2 records (1 active, 1 former)
○A157.7.144.132015-07-22 → 2016-04-26 · 4 obs
● 2015-07-22 03:45:30
● 2016-04-26 21:18:42
○ 2026-03-22 01:33:18
○ 2026-03-24 17:48:28
● 2016-04-26 21:18:42
○ 2026-03-22 01:33:18
○ 2026-03-24 17:48:28
●A160.251.229.912026-03-22 → 2026-03-24 · 3 obs
○ 2016-04-26 21:18:42
● 2026-03-22 01:33:18
● 2026-03-24 17:48:28
● 2026-03-22 01:33:18
● 2026-03-24 17:48:28
🔍 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:157.7.34.81
NS records: dns01.gmoserver.jp, dns02.gmoserver.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for first-s.net (unsigned zone)
⏱️ Timing
Total: 1001ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 160.251.229.91 |
Analysis
Mail Server Role
mx.first-s.net functions as a mail server for first-s.net.
IP Addresses
mx.first-s.net resolves to one IP number: 160.251.229.91.
other host names including mx.j-sy.com, mx.sma-cam.jp, mx.g-ag.jp, mx.hakocha.com and mx.kongo-unyu.jp share IP numbers with mx.first-s.net.