b-school.ru - robtex.com
b-school.ru
| DNSSEC | ⚠️ Not signed | ||||||
| A | 37.143.11.11🇷🇺 EUROBYTE37.143.10.0/23 | ||||||
| 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.b-school.ru ⭐ | ||||||
| A | 2a03:c980:dead:2a01:46:254:21:39🇷🇺 EUROBYTE2a03:c980:dead::/48 | ||||||
| PTR | vip-mail1.ihc.ru | ||||||
| A | 46.254.21.39🇷🇺 EUROBYTE46.254.20.0/23 | ||||||
| TXT | v=spf1 a mx ~all | ||||||
| SOA | ns1.ihc.ruinfo@ihc.ru 2022-02-10 #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=4069701 | ||||||
Subdomains
mail.b-school.ru |
Same first word
Similar names
DNS History
18 records (4 active, 14 former)
●NSns1.ihc.ru2026-07-22 → 2026-07-22 · 3 obs
● 2026-07-22 01:15:46
● 2026-07-22 01:15:50
○NSns1.reg.ru2019-02-03 → 2019-02-03 · 4 obs
● 2019-02-03 06:14:58
○ 2026-07-22 01:15:46
○ 2026-07-22 01:15:50
○NSns1.snparking.ru2017-03-14 → 2017-03-14 · 4 obs
● 2017-03-14 01:52:54
○ 2019-02-03 06:14:58
○ 2026-07-22 01:15:50
●NSns2.ihc.ru2026-07-22 → 2026-07-22 · 3 obs
● 2026-07-22 01:15:46
● 2026-07-22 01:15:50
○NSns2.reg.ru2019-02-03 → 2019-02-03 · 4 obs
● 2019-02-03 06:14:58
○ 2026-07-22 01:15:46
○ 2026-07-22 01:15:50
○NSns2.snparking.ru2017-03-14 → 2017-03-14 · 4 obs
● 2017-03-14 01:52:54
○ 2019-02-03 06:14:58
○ 2026-07-22 01:15:50
○NSns3.salenames.ru2015-07-26 → 2016-07-09 · 4 obs
● 2016-07-09 21:18:52
○ 2017-03-14 01:52:54
○ 2026-07-22 01:15:50
○NSns4.salenames.ru2015-07-26 → 2016-07-09 · 4 obs
● 2016-07-09 21:18:52
○ 2017-03-14 01:52:54
○ 2026-07-22 01:15:50
○NSsnparking.com2017-03-14 → 2017-03-14 · 4 obs
● 2017-03-14 01:52:54
○ 2019-02-03 06:14:58
○ 2026-07-22 01:15:50
○MX148.240.4.322015-07-26 → 2015-07-26 · 3 obs
○ 2016-03-13 13:45:10
○ 2026-07-22 01:15:50
●MXmail.b-school.ru2026-07-22 → 2026-07-22 · 3 obs
● 2026-07-22 01:15:46
● 2026-07-22 01:15:50
○MXvoid.blackhole.mx2016-03-13 → 2016-07-09 · 5 obs
● 2016-03-13 13:45:10
● 2016-07-09 21:18:52
○ 2017-03-14 01:52:54
○ 2026-07-22 01:15:50
○A109.206.190.542016-07-09 → 2016-07-09 · 4 obs
● 2016-07-09 21:18:52
○ 2017-03-14 01:52:54
○ 2026-07-22 01:15:50
○A185.53.179.402017-03-14 → 2017-03-14 · 4 obs
● 2017-03-14 01:52:54
○ 2019-02-03 06:14:58
○ 2026-07-22 01:15:50
○A192.237.187.2082016-03-13 → 2016-03-13 · 4 obs
● 2016-03-13 13:45:10
○ 2016-07-09 21:18:52
○ 2026-07-22 01:15:50
○A194.87.210.1512019-02-03 → 2019-02-03 · 4 obs
● 2019-02-03 06:14:58
○ 2026-07-22 01:15:46
○ 2026-07-22 01:15:50
●A37.143.11.112026-07-22 → 2026-07-22 · 3 obs
● 2026-07-22 01:15:46
● 2026-07-22 01:15:50
○A91.195.241.862015-07-26 → 2015-07-26 · 3 obs
○ 2016-03-13 13:45:10
○ 2026-07-22 01:15:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ru | a.dns.ripn.net, b.dns.ripn.net, c.tld-servers.ru, d.dns.ripn.net... | - |
| b-school.ru | ns1.ihc.ru, ns2.ihc.ru | 5 records |
✅ Authoritative Response
Server:46.254.22.38
NS records: ns1.ihc.ru, ns2.ihc.ru
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for b-school.ru (unsigned zone)
⏱️ Timing
Total: 1025ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 37.143.11.11 |
| NS | 2 | ns1.ihc.ru, ns2.ihc.ru |
| MX | 1 | mail.b-school.ru (pri: 10) |
| TXT | 1 | v=spf1 a mx ~all |
| SOA | 1 | ns1.ihc.ru info.ihc.ru |
📌 Glue Records Collected
Total: 5
Out-of-bailiwick: 5 (ns1.ihc.ru, ns2.ihc.ru, ns2.ihc.ru...)
Analysis
Hierarchy
b-school.ru serves as the parent of mail.b-school.ru.
IP Addresses
b-school.ru resolves to just one IP address, 37.143.11.11.
Two other host names, along with kotel-servis.ru, exalis.ru and *.pr-spb.ru, also share IP numbers with b-school.ru.
Name Servers
b-school.ru is delegated to two name servers: ns1.ihc.ru and ns2.ihc.ru.
b-school.ru shares its NS records with other domains, for example go(0x736578)press.ru, patrician.ru, partner-banka.ru and two others.
Hostnames that map to three IP numbers:
ns2.ihc.ru points to 46.254.22.38, 91.121.54.18 and 2001:41d0:1008:2c3b::1.
Host names that have two IP addresses:
ns1.ihc.ru points to 46.254.23.52 and 2a03:c980:beef:6002:46:254:23:52.
Mail Servers
The sole mail server for b-school.ru is mail.b-school.ru.
mail.b-school.ru has two IP addresses: 46.254.21.39 and 2a03:c980:dead:2a01:46:254:21:39.