ostc.com.vn - robtex.com
ostc.com.vn
com.vn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | dns-master.vnnic.vn ⭐ | ||||||
| NS | a.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | b.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | c.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | d.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | e.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | f.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | g.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | h.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| SOA | dns-master.vnnic.vnpostmaster@vnnic.vn serial=2022709240 | ||||||
Subdomains
Same first word
ostc.com |
ostc.qa |
ostc.co.uk |
ostc.ch |
ostc.com.tw |
ostc.net |
ostc.com.vn |
ostc.de |
ostc.com.cn |
ostc.com.hk |
ostc.org |
ostc.ie |
ostc.biz |
ostc.ir |
ostc.ru |
ostc.info |
ostc.eu |
ostc.cn |
Similar names
DNS History
5 records (5 active, 0 former)
●MXmail.ostc.com.vn2026-05-01 → 2026-05-11 · 2 obs
● 2026-05-11 06:28:34
●A115.146.127.2122026-05-01 → 2026-05-11 · 2 obs
● 2026-05-11 06:28:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| vn | c.dns-servers.vn, a.dns-servers.vn, e.dns-servers.vn, g.dns-servers.vn... | - |
| ostc.com.vn | ns-b1.tenten.vn, ns-b2.tenten.vn, ns-b3.tenten.vn | - |
✅ Authoritative Response
Server:163.44.207.21
NS records: ns-b1.tenten.vn, ns-b2.tenten.vn, ns-b3.tenten.vn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ostc.com.vn (unsigned zone)
⏱️ Timing
Total: 2565ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 115.146.127.212 |
| NS | 3 | ns-b1.tenten.vn, ns-b2.tenten.vn... |
| MX | 1 | mail.ostc.com.vn (pri: 10) |
| TXT | 1 | v=spf1 a mx ip4:119.15.167.200 ip4:210.8 |
| SOA | 1 | ns-b3.tenten.vn root.ns1.netnam.vn |
Analysis
Hierarchy
ostc.com.vn is a parent of mail.ostc.com.vn, ftp.ostc.com.vn, smtp.ostc.com.vn, www.ostc.com.vn and pop.ostc.com.vn.
IP Addresses
ostc.com.vn resolves to one IP number: 115.146.127.212.
other host names including donghovintage.vn, inoxtantien.vn, pop.trabi.vn, smtp.ric.org.vn and www.inoxtantien.vn share IP numbers with ostc.com.vn.
Name Servers
ostc.com.vn is delegated to three name servers ns-b1.tenten.vn, ns-b2.tenten.vn and ns-b3.tenten.vn.
ostc.com.vn at least partially shares name servers with other domains, for instance nemthangloivn.vn, ensodana.vn, toyotahoabinh.vn, rabbitmedia.vn and noithatquyphuc.vn.
These name servers are commonly used with ns-a1.tenten.vn, ns-a2.tenten.vn and ns-a3.tenten.vn.
Host names with two IP numbers:
ns-b1.tenten.vn points to: 2404:f080:1101:321:a150:95:110:1230 and 137.59.104.67.
ns-b2.tenten.vn points to: 2404:f080:1101:321:a150:95:110:1231 and 137.59.104.68.
ns-b3.tenten.vn points to: 2404:f080:1101:321:a150:95:110:1232 and 163.44.207.21.
Mail Servers
ostc.com.vn is handled by a single mail server, mail.ostc.com.vn.
mail.ostc.com.vn resolves to IP 119.15.167.200.