otb-sys.net - robtex.com
otb-sys.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 157.7.50.49🇯🇵 GMO-INTERNET157.7.48.0/20 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan | ||||||
| PTR | v157-7-50-49.gwfr.static.cnode.io | ||||||
| NS | 01.dnsv.jp ⭐ | ||||||
| A | 2400:8500:3300::53🇯🇵 GMO-DNS2400:8500:3300::/48 GMO Internet,inc. | ||||||
| PTR | 01.dnsv.jp | ||||||
| A | 157.7.32.53🇯🇵 GMO-DNS157.7.32.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | 01.dnsv.jp | ||||||
| NS | 02.dnsv.jp | ||||||
| A | 157.7.33.53🇯🇵 GMO-DNS157.7.33.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | 02.dnsv.jp | ||||||
| NS | 03.dnsv.jp | ||||||
| A | 2400:8500:3000::53🇯🇵 GMO-DNS2400:8500:3000::/48 GMO Internet,inc. | ||||||
| PTR | 03.dnsv.jp | ||||||
| A | 157.7.34.53🇯🇵 GMO-DNS157.7.34.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | 03.dnsv.jp | ||||||
| NS | 04.dnsv.jp | ||||||
| A | 2400:8500:3fff::53🇯🇵 GMO-DNS2400:8500:3fff::/48 GMO Internet,inc. | ||||||
| PTR | 04.dnsv.jp | ||||||
| A | 157.7.35.53🇯🇵 GMO-DNS157.7.35.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | 04.dnsv.jp | ||||||
| MX | mail.otb-sys.net ⭐ | ||||||
| A | 157.7.50.49🇯🇵 GMO-INTERNET157.7.48.0/20 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan | ||||||
| PTR | v157-7-50-49.gwfr.static.cnode.io | ||||||
| SOA | 01.dnsv.jphostmaster@dnsv.jp serial=1674359256 | ||||||
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=1777348236 | ||||||
Subdomains
mail.otb-sys.net |
Same first word
otb-sys.net |
Similar names
DNS History
10 records (6 active, 4 former)
●NS01.dnsv.jp2017-04-19 → 2026-04-28 · 3 obs
● 2017-04-19 22:12:50
● 2026-04-28 04:12:42
●NS02.dnsv.jp2017-04-19 → 2026-04-28 · 3 obs
● 2017-04-19 22:12:50
● 2026-04-28 04:12:42
●NS03.dnsv.jp2017-04-19 → 2026-04-28 · 3 obs
● 2017-04-19 22:12:50
● 2026-04-28 04:12:42
●NS04.dnsv.jp2017-04-19 → 2026-04-28 · 3 obs
● 2017-04-19 22:12:50
● 2026-04-28 04:12:42
○NSns-1168.awsdns-18.org2015-08-13 → 2016-07-03 · 4 obs
● 2016-07-03 13:40:38
○ 2017-04-19 22:12:50
○ 2026-04-28 04:12:42
○NSns-1825.awsdns-36.co.uk2015-08-13 → 2016-07-03 · 4 obs
● 2016-07-03 13:40:38
○ 2017-04-19 22:12:50
○ 2026-04-28 04:12:42
○NSns-474.awsdns-59.com2015-08-13 → 2016-07-03 · 4 obs
● 2016-07-03 13:40:38
○ 2017-04-19 22:12:50
○ 2026-04-28 04:12:42
○NSns-601.awsdns-11.net2015-08-13 → 2016-07-03 · 4 obs
● 2016-07-03 13:40:38
○ 2017-04-19 22:12:50
○ 2026-04-28 04:12:42
●MXmail.otb-sys.net2015-08-13 → 2026-04-28 · 2 obs
● 2026-04-28 04:12:42
●A157.7.50.492015-08-13 → 2026-04-28 · 2 obs
● 2026-04-28 04:12:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| otb-sys.net | 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp | - |
✅ Authoritative Response
Server:157.7.35.53
NS records: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for otb-sys.net (unsigned zone)
⏱️ Timing
Total: 386ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 157.7.50.49 |
| NS | 4 | 01.dnsv.jp, 02.dnsv.jp... |
| MX | 1 | mail.otb-sys.net (pri: 10) |
| SOA | 1 | 01.dnsv.jp hostmaster.dnsv.jp |
Analysis
Hierarchy
otb-sys.net is the parent of mail.otb-sys.net.
IP Addresses
otb-sys.net points to a single IP number: 157.7.50.49.
Other host names, for instance mail.otb-sys.net, share IP numbers with otb-sys.net.
Name Servers
otb-sys.net is delegated to four name servers: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp and 04.dnsv.jp.
otb-sys.net at least partially shares name servers with other domains, for instance minosuke.biz, ogawaclinic.jp, kawaii-republic.com, ii-office-tokyo.com and hiroba.us.
Two IPs for hosts:
01.dnsv.jp points to: 2400:8500:3300::53 and 157.7.32.53
03.dnsv.jp points to: 2400:8500:3000::53 and 157.7.34.53
04.dnsv.jp points to: 2400:8500:3fff::53 and 157.7.35.53
One IP for a host:
02.dnsv.jp points to: 157.7.33.53
Mail Servers
otb-sys.net is handled by a single mail server, mail.otb-sys.net.
Host name mail.otb-sys.net points to IP address 157.7.50.49.