coursealgorithm.ru - dns.ninja
coursealgorithm.ru
| DNSSEC | ⚠️ Not signed | ||||||
| A | 185.65.148.19 | ||||||
| NS | ns3.getcourse.ru ⭐ | ||||||
| NS | ns1.getcourse.ru | ||||||
| NS | ns2.gcloudns.com | ||||||
| MX | emx.mail.ru ⭐ | ||||||
| A | 94.100.180.180🇷🇺 AS4776494.100.176.0/20 | ||||||
| PTR | emx.mail.ru | ||||||
| A | 217.69.139.180🇷🇺 AS47764217.69.128.0/20 | ||||||
| PTR | emx.mail.ru | ||||||
| TXT | mailru-domain: qdwPJ6PD1GHsdyyH | ||||||
| TXT | v=spf1 include:58b0857493af2f67a217a9727f0dfb24.gca.to include:_spf.mail.ru ~all | ||||||
| SOA | ns3.getcourse.ruhostmaster@coursealgorithm.ru serial=2 | ||||||
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=4070762 | ||||||
Same first word
coursealgorithm.ru |
Similar names
DNS History
6 records (5 active, 1 former)
●NSns1.getcourse.ru2026-09-19 → 2026-10-18 · 2 obs
● 2026-09-19 09:38:36
● 2026-10-18 02:56:26
● 2026-10-18 02:56:26
●NSns2.gcloudns.com2026-09-19 → 2026-10-18 · 2 obs
● 2026-09-19 09:38:36
● 2026-10-18 02:56:26
● 2026-10-18 02:56:26
○NSns2.getcourse.ru2026-09-25 → 2026-09-25 · 4 obs
○ 2026-09-19 09:38:36
● 2026-09-25 01:59:28
○ 2026-10-04 20:20:56
○ 2026-10-18 02:56:26
● 2026-09-25 01:59:28
○ 2026-10-04 20:20:56
○ 2026-10-18 02:56:26
●NSns3.getcourse.ru2026-09-19 → 2026-10-18 · 2 obs
● 2026-09-19 09:38:36
● 2026-10-18 02:56:26
● 2026-10-18 02:56:26
●A185.65.148.192026-09-19 → 2026-10-18 · 2 obs
● 2026-09-19 09:38:36
● 2026-10-18 02:56:26
● 2026-10-18 02:56:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ru | a.dns.ripn.net, d.dns.ripn.net, f.dns.ripn.net, b.dns.ripn.net... | - |
| coursealgorithm.ru | ns1.getcourse.ru, ns2.gcloudns.com, ns3.getcourse.ru | - |
✅ Authoritative Response
Server:31.41.155.39
NS records: ns1.getcourse.ru, ns2.gcloudns.com, ns3.getcourse.ru
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coursealgorithm.ru (unsigned zone)
⏱️ Timing
Total: 2247ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 185.65.148.19 |
| NS | 3 | ns1.getcourse.ru, ns3.getcourse.ru... |
| MX | 1 | emx.mail.ru (pri: 10) |
| TXT | 2 | v=spf1 include:58b0857493af2f67a217a9727, mailru-domain: qdwPJ6PD1GHsdyyH |
| SOA | 1 | ns3.getcourse.ru hostmaster.coursealgori |
Analysis
IP Addresses
coursealgorithm.ru directs to one IP number, which is 185.65.148.19.
Name Servers
coursealgorithm.ru carries NS records delegating to ns2.gcloudns.com, ns1.getcourse.ru and ns3.getcourse.ru.
Mail Servers
coursealgorithm.ru routes its mail through a single mail server, emx.mail.ru.
The host emx.mail.ru resolves to 94.100.180.180 and 217.69.139.180 — two IP addresses.