studycourse.ru - dns.ninja
studycourse.ru
| DNSSEC | ⚠️ Not signed | ||||||
| A | 37.143.13.57🇷🇺 EUROBYTE37.143.12.0/23 | ||||||
| PTR | aristoff.ru | ||||||
| NS | ns1.ihc.ru ⭐ | ||||||
| A | 2a03:c980:beef:6002:46:254:23:52🇷🇺 EUROBYTE2a03:c980:beef::/48 | ||||||
| PTR | ns1.ihc.ru | ||||||
| A | 46.254.23.52🇷🇺 EUROBYTE46.254.23.0/24 | ||||||
| PTR | ns1.ihc.ru | ||||||
| NS | ns2.ihc.ru | ||||||
| A | 2001:41d0:1008:2c3b::1🇫🇷 OVH2001:41d0::/32 IPv6 | ||||||
| PTR | ns2.ihc.ru | ||||||
| A | 46.254.22.38🇷🇺 EUROBYTE46.254.22.0/24 | ||||||
| PTR | ns1.ihc.ru | ||||||
| A | 91.121.54.18🇫🇷 OVH91.121.0.0/16 ISP Paris, France | ||||||
| PTR | ns2.ihc.ru | ||||||
| MX | mail.studycourse.ru ⭐ | ||||||
| A | 37.143.13.57🇷🇺 EUROBYTE37.143.12.0/23 | ||||||
| PTR | aristoff.ru | ||||||
| SOA | ns1.ihc.ruinfo@ihc.ru 2021-05-16 #1 | ||||||
ru
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.dns.ripn.net ⭐ | ||||||
| NS | b.dns.ripn.net | ||||||
| NS | c.tld-servers.ru | ||||||
| NS | d.dns.ripn.net | ||||||
| NS | e.dns.ripn.net | ||||||
| NS | f.dns.ripn.net | ||||||
| SOA | a.dns.ripn.nethostmaster@ripn.net serial=4069735 | ||||||
Subdomains
mail.studycourse.ru |
Same first word
studycourse.ru |
studycourse.org |
studycourse.blog |
Similar names
DNS History
11 records (4 active, 7 former)
●NSns1.ihc.ru2026-02-19 → 2026-07-24 · 3 obs
● 2026-02-19 17:28:56
● 2026-07-24 20:23:12
○NSns1.spaceweb.ru2015-06-23 → 2017-01-31 · 4 obs
● 2017-01-31 02:27:44
○ 2026-02-19 17:28:56
○ 2026-07-24 20:23:12
●NSns2.ihc.ru2026-02-19 → 2026-07-24 · 3 obs
● 2026-02-19 17:28:56
● 2026-07-24 20:23:12
○NSns2.spaceweb.ru2015-06-23 → 2017-01-31 · 4 obs
● 2017-01-31 02:27:44
○ 2026-02-19 17:28:56
○ 2026-07-24 20:23:12
○NSns3.spaceweb.pro2015-06-23 → 2017-01-31 · 4 obs
● 2017-01-31 02:27:44
○ 2026-02-19 17:28:56
○ 2026-07-24 20:23:12
○NSns4.spaceweb.pro2015-06-23 → 2017-01-31 · 4 obs
● 2017-01-31 02:27:44
○ 2026-02-19 17:28:56
○ 2026-07-24 20:23:12
●MXmail.studycourse.ru2026-02-19 → 2026-07-24 · 3 obs
● 2026-02-19 17:28:56
● 2026-07-24 20:23:12
○MXmx1.spaceweb.ru2015-06-23 → 2017-01-31 · 4 obs
● 2017-01-31 02:27:44
○ 2026-02-19 17:28:56
○ 2026-07-24 20:23:12
○MXmx2.spaceweb.ru2015-06-23 → 2017-01-31 · 4 obs
● 2017-01-31 02:27:44
○ 2026-02-19 17:28:56
○ 2026-07-24 20:23:12
●A37.143.13.572026-02-19 → 2026-07-24 · 3 obs
● 2026-02-19 17:28:56
● 2026-07-24 20:23:12
○A77.222.61.122015-06-23 → 2017-01-31 · 4 obs
● 2017-01-31 02:27:44
○ 2026-02-19 17:28:56
○ 2026-07-24 20:23:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ru | a.dns.ripn.net, b.dns.ripn.net, c.tld-servers.ru, d.dns.ripn.net... | - |
| studycourse.ru | ns2.ihc.ru, ns1.ihc.ru | 5 records |
✅ Authoritative Response
Server:46.254.23.52
NS records: ns2.ihc.ru, ns1.ihc.ru
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for studycourse.ru (unsigned zone)
⏱️ Timing
Total: 779ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 37.143.13.57 |
| NS | 2 | ns1.ihc.ru, ns2.ihc.ru |
| MX | 1 | mail.studycourse.ru (pri: 10) |
| SOA | 1 | ns1.ihc.ru info.ihc.ru |
📌 Glue Records Collected
Total: 5
Out-of-bailiwick: 5 (ns2.ihc.ru, ns2.ihc.ru, ns1.ihc.ru...)
Analysis
Hierarchy
studycourse.ru serves as the parent of mail.studycourse.ru.
IP Addresses
studycourse.ru directs to one IP number, which is 37.143.13.57.
Among the host names that share IP numbers with studycourse.ru are mail.nessyboat.ru, aristoff.ru, mail.mirkresla.ru and two others.
Name Servers
DNS delegation for studycourse.ru points to two name servers: ns1.ihc.ru and ns2.ihc.ru.
studycourse.ru has the same name server delegation as a number of other domains, such as iass.ru, viont.ru, mpgs.ru and two more.
Hosts with three IP address records:
ns2.ihc.ru has IP addresses 46.254.22.38, 91.121.54.18 and 2001:41d0:1008:2c3b::1.
Hosts with two IP numbers each:
ns1.ihc.ru has two IP addresses: 46.254.23.52 and 2a03:c980:beef:6002:46:254:23:52.
Mail Servers
studycourse.ru routes its mail through a single mail server, mail.studycourse.ru.
mail.studycourse.ru has exactly one IP number: 37.143.13.57.