ohstudy.com - robtex.com
ohstudy.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 34.8.143.225🇺🇸 Google34.8.0.0/13 | ||||||
| PTR | 225.143.8.34.bc.googleusercontent.com | ||||||
| NS | localhost@ ⭐ | ||||||
| NS | ns1.cyberdns.tw | ||||||
| A | 34.80.212.212🇹🇼 Google34.80.208.0/20 | ||||||
| PTR | 212.212.80.34.bc.googleusercontent.com | ||||||
| NS | ns2.cyberdns.tw | ||||||
| A | 35.194.228.87🇹🇼 Google35.194.224.0/20 | ||||||
| PTR | 87.228.194.35.bc.googleusercontent.com | ||||||
| MX | mail.ohstudy.com ⭐ | ||||||
| A | 61.218.70.2🇹🇼 HiNet61.218.0.0/16 (HiNet) Chunghwa Telecom Co., Ltd. | ||||||
| PTR | 61-218-70-2.hinet-ip.hinet.net | ||||||
| TXT | v=spf1 a mx ptr ~all | ||||||
| SOA | localhost@hostmaster@ohstudy.com serial=2013 | ||||||
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=1784859347 | ||||||
Subdomains
mail.ohstudy.com |
Same first word
Similar names
DNS History
9 records (5 active, 4 former)
●NSlocalhost@2026-02-25 → 2026-07-24 · 3 obs
● 2026-02-25 21:03:52
● 2026-07-24 02:19:46
○NSlocalhost\@2015-08-19 → 2017-07-10 · 4 obs
● 2017-07-10 11:58:00
○ 2026-02-25 21:03:52
○ 2026-07-24 02:19:46
●NSns1.cyberdns.tw2026-02-25 → 2026-07-24 · 3 obs
● 2026-02-25 21:03:52
● 2026-07-24 02:19:46
●NSns2.cyberdns.tw2026-02-25 → 2026-07-24 · 3 obs
● 2026-02-25 21:03:52
● 2026-07-24 02:19:46
○NSpdns1.pchome.com.tw2015-08-19 → 2017-07-10 · 4 obs
● 2017-07-10 11:58:00
○ 2026-02-25 21:03:52
○ 2026-07-24 02:19:46
○NSpdns2.pchome.com.tw2015-08-19 → 2017-07-10 · 4 obs
● 2017-07-10 11:58:00
○ 2026-02-25 21:03:52
○ 2026-07-24 02:19:46
●MXmail.ohstudy.com2015-08-19 → 2026-07-24 · 2 obs
● 2026-07-24 02:19:46
○A113.196.231.2242015-08-19 → 2017-07-10 · 4 obs
● 2017-07-10 11:58:00
○ 2026-02-25 21:03:52
○ 2026-07-24 02:19:46
●A34.8.143.2252026-02-25 → 2026-07-24 · 3 obs
● 2026-02-25 21:03:52
● 2026-07-24 02:19:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| ohstudy.com | ns1.cyberdns.tw, ns2.cyberdns.tw | - |
✅ Authoritative Response
Server:35.194.228.87
NS records: ns1.cyberdns.tw, ns2.cyberdns.tw
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ohstudy.com (unsigned zone)
⏱️ Timing
Total: 1216ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 34.8.143.225 |
| NS | 2 | ns2.cyberdns.tw, ns1.cyberdns.tw |
| MX | 1 | mail.ohstudy.com (pri: 10) |
| TXT | 1 | v=spf1 a mx ptr ~all |
| SOA | 1 | localhost@ hostmaster.ohstudy.com |
Analysis
Hierarchy
mail.ohstudy.com is a subdomain of ohstudy.com.
IP Addresses
ohstudy.com points to a single IP number: 34.8.143.225.
Additional host names — caresse.com.tw, qtsew.com, 29565220.com and two others — share IP numbers with ohstudy.com.
Name Servers
The authoritative name servers for ohstudy.com are localhost@, ns1.cyberdns.tw and ns2.cyberdns.tw — three in total.
The name servers of ohstudy.com overlap at least partially with those of other domains — among them wdb.com.tw, amazinghall.com.tw, mytour.com.tw and two more.
Both ns1.cyberdns.tw and ns2.cyberdns.tw have a single IP address each — ns1.cyberdns.tw resolves to 34.80.212.212 while ns2.cyberdns.tw resolves to 35.194.228.87.
Mail Servers
ohstudy.com has one mail server: mail.ohstudy.com.
mail.ohstudy.com directs to just one IP number, 61.218.70.2.