study.su - robtex.com
study.su
| DNSSEC | ⚠️ Not signed | ||||||
| A | 82.97.243.107🇦🇺 TimeWeb-AS82.97.243.0/24 | ||||||
| NS | ns1.rf.ru ⭐ | ||||||
| A | 80.249.147.221🇷🇺 SELECTEL80.249.144.0/22 -NET | ||||||
| PTR | razina.ru | ||||||
| NS | ns2.rf.ru | ||||||
| A | 80.249.147.221🇷🇺 SELECTEL80.249.144.0/22 -NET | ||||||
| PTR | razina.ru | ||||||
| TXT | 1RHu5HFTnsoiz9fXiL7wNgrP9O0rkHVjD7gAy3vcLxjXq94TU6 | ||||||
| SOA | ns1.rf.ruhostmaster@study.su 2026-04-14 #4 | ||||||
su
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.dns.ripn.net ⭐ | ||||||
| NS | b.dns.ripn.net | ||||||
| NS | d.dns.ripn.net | ||||||
| NS | e.dns.ripn.net | ||||||
| NS | f.dns.ripn.net | ||||||
| SOA | a.dns.ripn.nethostmaster@ripn.net serial=650209818 | ||||||
Subdomains
mail.study.su |
Same first word
Similar names
DNS History
8 records (3 active, 5 former)
○NSns.ropnet.ru2015-07-14 → 2016-12-03 · 4 obs
● 2016-12-03 05:15:02
○ 2026-03-26 19:06:10
○ 2026-07-13 08:07:28
●NSns1.rf.ru2026-03-26 → 2026-07-13 · 3 obs
● 2026-03-26 19:06:10
● 2026-07-13 08:07:28
○NSns1.ropnet.ru2015-07-14 → 2016-12-03 · 4 obs
● 2016-12-03 05:15:02
○ 2026-03-26 19:06:10
○ 2026-07-13 08:07:28
●NSns2.rf.ru2026-03-26 → 2026-07-13 · 3 obs
● 2026-03-26 19:06:10
● 2026-07-13 08:07:28
○MXmail.study.su2015-07-14 → 2016-12-03 · 4 obs
● 2016-12-03 05:15:02
○ 2026-03-26 19:06:10
○ 2026-07-13 08:07:28
○A212.42.42.52015-07-14 → 2016-12-03 · 4 obs
● 2016-12-03 05:15:02
○ 2026-03-26 19:06:10
○ 2026-07-13 08:07:28
○A5.188.131.102026-03-26 → 2026-04-09 · 5 obs
● 2026-03-26 19:06:10
● 2026-04-09 02:46:30
○ 2026-04-17 20:10:10
○ 2026-07-13 08:07:28
●A82.97.243.1072026-04-17 → 2026-07-13 · 3 obs
● 2026-04-17 20:10:10
● 2026-07-13 08:07:28
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| su | a.dns.ripn.net, f.dns.ripn.net, d.dns.ripn.net, b.dns.ripn.net... | 10 records |
| study.su | ns2.rf.ru, ns1.rf.ru | - |
✅ Authoritative Response
Server:80.249.147.221
NS records: ns2.rf.ru, ns1.rf.ru
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for study.su (unsigned zone)
⏱️ Timing
Total: 1929ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 82.97.243.107 |
| NS | 2 | ns2.rf.ru, ns1.rf.ru |
| TXT | 1 | 1RHu5HFTnsoiz9fXiL7wNgrP9O0rkHVjD7gAy3vc |
| SOA | 1 | ns1.rf.ru hostmaster.study.su |
📌 Glue Records Collected
Total: 10
Out-of-bailiwick: 10 (f.dns.ripn.net, e.dns.ripn.net, d.dns.ripn.net...)
Analysis
Hierarchy
mail.study.su is delegated beneath study.su.
IP Addresses
study.su directs to one IP number, which is 82.97.243.107.
Among the host names that share IP numbers with study.su are bigfisher.ru, mail.vodamir.ru, mail.220-v.ru and two others.
Name Servers
study.su uses two name servers for its delegation: ns1.rf.ru and ns2.rf.ru.
study.su has the same name server delegation as a number of other domains, such as ncpl.ru, fock.ru, inertek.ru and two more.
There is an overlap in name servers between study.su and other domains, for example xn--80adolcetc2a6l.xn--p1ai, mansardas.ru and xn--80aafc0dlfp.xn--p1ai
These name servers frequently co-occur with the name servers ns2.domeny-rf.ru and ns1.domeny-rf.ru.
ns1.rf.ru resolves to 80.249.147.221; ns2.rf.ru resolves to the same IP address, 80.249.147.221.
Both ns1.rf.ru and ns2.rf.ru resolve to 80.249.147.221 IP addresses each.