bstudy.ru - dns.ninja

bstudy.ru

DNSSEC⚠️ Not signed
A92.42.15.42🇷🇺 SELECTEL-MSK92.42.15.0/24 Selectel Route Object
NSa.ns.selectel.ru ⭐
A2a00:ab00:800::2:53🇷🇺 SELECTEL2a00:ab00::/32 Selectel IPv6
A188.68.203.1🇷🇺 SELECTEL188.68.203.0/24 Selectel Route Object
PTRa.ns.selectel.ru
NSb.ns.selectel.ru
A2a00:ab00:801::2:53🇷🇺 SELECTEL2a00:ab00::/32 Selectel IPv6
A77.223.114.2🇷🇺 SELECTEL77.223.114.0/24 Selectel Route Object
PTRb.ns.selectel.ru
NSc.ns.selectel.ru
A2a00:ab00:802::2:53🇷🇺 SELECTEL2a00:ab00::/32 Selectel IPv6
A188.68.203.3🇷🇺 SELECTEL188.68.203.0/24 Selectel Route Object
PTRc.ns.selectel.ru
NSd.ns.selectel.ru
A2a00:ab00:803::2:53🇷🇺 SELECTEL2a00:ab00::/32 Selectel IPv6
A77.223.114.4🇷🇺 SELECTEL77.223.114.0/24 Selectel Route Object
PTRd.ns.selectel.ru
MXmail.bstudy.ru ⭐
A92.42.15.42🇷🇺 SELECTEL-MSK92.42.15.0/24 Selectel Route Object
TXTgoogle-site-verification=R0Ov5RpWosyOi5LZcRXtf4RjiadXLscGkGJDHQW7Pk4
TXTv=spf1 mx -all
SOAa.ns.selectel.rusupport@selectel.ru 2026-07-21 #1

ru

DNSSEC🔒 Signed (DS record present)
NSa.dns.ripn.net ⭐
NSb.dns.ripn.net
NSc.tld-servers.ru
NSd.dns.ripn.net
NSe.dns.ripn.net
NSf.dns.ripn.net
SOAa.dns.ripn.nethostmaster@ripn.net serial=4069760

Subdomains

mail.bstudy.ru

Same first word

bstudy.net
bstudy.jp
bstudy.ru
bstudy.com

Similar names

stubdy.com
studby.com
bydust.com
bystud.com
buydst.com
studyb.com
buytds.net
dubsty.com
stdbuy.cn
budyst.com
bustyd.com
buytds.com

DNS History

23 records (6 active, 17 former)

20162017201820192020202120222023202420252026NSa.ns.selectel.rub.ns.selectel.ruc.ns.selectel.rud.ns.selectel.rua.misconfigured.dns.server.invalidns1.hubthe.teamns1.snparking.runs2.hubthe.teamns2.snparking.runs3.salenames.runs4.salenames.rusnparking.comMXmail.bstudy.ru148.240.4.32148.240.4.32148.240.4.32.bstudy.ruvoid.blackhole.mxA92.42.15.42109.206.190.54192.237.187.20862.122.170.17178.140.173.7391.195.240.135
○NSa.misconfigured.dns.server.invalid2026-05-19 → 2026-06-14 · 5 obs
○ 2017-06-29 15:00:44
● 2026-05-19 11:22:32
● 2026-06-14 02:35:24
○ 2026-06-16 18:48:54
○ 2026-07-26 23:27:02
●NSa.ns.selectel.ru2026-06-18 → 2026-07-26 · 3 obs
○ 2026-06-16 18:48:54
● 2026-06-18 07:42:14
● 2026-07-26 23:27:02
●NSb.ns.selectel.ru2026-06-18 → 2026-07-26 · 3 obs
○ 2026-06-16 18:48:54
● 2026-06-18 07:42:14
● 2026-07-26 23:27:02
●NSc.ns.selectel.ru2026-06-18 → 2026-07-26 · 3 obs
○ 2026-06-16 18:48:54
● 2026-06-18 07:42:14
● 2026-07-26 23:27:02
●NSd.ns.selectel.ru2026-06-18 → 2026-07-26 · 3 obs
○ 2026-06-16 18:48:54
● 2026-06-18 07:42:14
● 2026-07-26 23:27:02
○NSns1.hubthe.team2026-05-19 → 2026-06-16 · 5 obs
○ 2017-06-29 15:00:44
● 2026-05-19 11:22:32
● 2026-06-16 18:48:54
○ 2026-06-18 07:42:14
○ 2026-07-26 23:27:02
○NSns1.snparking.ru2017-01-16 → 2017-06-29 · 5 obs
○ 2016-11-25 08:52:24
● 2017-01-16 15:51:16
● 2017-06-29 15:00:44
○ 2026-05-19 11:22:32
○ 2026-07-26 23:27:02
○NSns2.hubthe.team2026-05-19 → 2026-06-16 · 5 obs
○ 2017-06-29 15:00:44
● 2026-05-19 11:22:32
● 2026-06-16 18:48:54
○ 2026-06-18 07:42:14
○ 2026-07-26 23:27:02
○NSns2.snparking.ru2017-01-16 → 2017-01-16 · 4 obs
○ 2016-11-25 08:52:24
● 2017-01-16 15:51:16
○ 2017-06-29 15:00:44
○ 2026-07-26 23:27:02
○NSns3.salenames.ru2015-08-30 → 2017-06-29 · 6 obs
● 2015-08-30 00:49:58
● 2016-11-25 08:52:24
○ 2017-01-16 15:51:16
● 2017-06-29 15:00:44
○ 2026-05-19 11:22:32
○ 2026-07-26 23:27:02
○NSns4.salenames.ru2015-08-30 → 2017-06-29 · 6 obs
● 2015-08-30 00:49:58
● 2016-11-25 08:52:24
○ 2017-01-16 15:51:16
● 2017-06-29 15:00:44
○ 2026-05-19 11:22:32
○ 2026-07-26 23:27:02
○NSsnparking.com2017-01-16 → 2017-01-16 · 4 obs
○ 2016-11-25 08:52:24
● 2017-01-16 15:51:16
○ 2017-06-29 15:00:44
○ 2026-07-26 23:27:02
○MX148.240.4.322015-10-11 → 2015-10-26 · 5 obs
○ 2015-08-30 00:49:58
● 2015-10-11 17:55:26
● 2015-10-26 16:50:00
○ 2015-11-05 10:40:44
○ 2026-07-26 23:27:02
○MX148.240.4.322015-08-30 → 2015-08-30 · 3 obs
● 2015-08-30 00:49:58
○ 2015-10-11 17:55:26
○ 2026-07-26 23:27:02
○MX148.240.4.32.bstudy.ru2015-11-05 → 2015-11-05 · 4 obs
○ 2015-10-26 16:50:00
● 2015-11-05 10:40:44
○ 2015-11-24 02:10:42
○ 2026-07-26 23:27:02
●MXmail.bstudy.ru2026-07-07 → 2026-07-26 · 3 obs
○ 2017-01-16 15:51:16
● 2026-07-07 12:59:28
● 2026-07-26 23:27:02
○MXvoid.blackhole.mx2015-11-24 → 2016-11-25 · 5 obs
○ 2015-11-05 10:40:44
● 2015-11-24 02:10:42
● 2016-11-25 08:52:24
○ 2017-01-16 15:51:16
○ 2026-07-26 23:27:02
○A109.206.190.542015-10-11 → 2016-11-25 · 9 obs
○ 2015-08-30 00:49:58
● 2015-10-11 17:55:26
● 2015-12-30 04:02:06
○ 2016-03-07 06:00:20
○ 2016-06-10 04:33:50
● 2016-08-26 23:03:22
● 2016-11-25 08:52:24
○ 2017-01-16 15:51:16
○ 2026-07-26 23:27:02
○A192.237.187.2082016-03-07 → 2016-06-10 · 5 obs
○ 2015-12-30 04:02:06
● 2016-03-07 06:00:20
● 2016-06-10 04:33:50
○ 2016-08-26 23:03:22
○ 2026-07-26 23:27:02
○A62.122.170.1712026-05-19 → 2026-07-26 · 2 obs
○ 2026-05-19 11:22:32
○ 2026-07-26 23:27:02
○A78.140.173.732015-08-30 → 2015-08-30 · 3 obs
● 2015-08-30 00:49:58
○ 2015-10-11 17:55:26
○ 2026-07-26 23:27:02
○A91.195.240.1352017-01-16 → 2017-06-29 · 5 obs
○ 2016-11-25 08:52:24
● 2017-01-16 15:51:16
● 2017-06-29 15:00:44
○ 2026-05-19 11:22:32
○ 2026-07-26 23:27:02
●A92.42.15.422026-05-19 → 2026-07-26 · 6 obs
○ 2017-06-29 15:00:44
● 2026-05-19 11:22:32
● 2026-06-14 02:35:24
○ 2026-06-16 18:48:54
● 2026-06-18 07:42:14
● 2026-07-26 23:27:02

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
rua.dns.ripn.net, b.dns.ripn.net, d.dns.ripn.net, e.dns.ripn.net...-
bstudy.rua.ns.selectel.ru, d.ns.selectel.ru, c.ns.selectel.ru, b.ns.selectel.ru8 records

✅ Authoritative Response

Server:77.223.114.4

NS records: a.ns.selectel.ru, d.ns.selectel.ru, c.ns.selectel.ru, b.ns.selectel.ru

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bstudy.ru (unsigned zone)

⏱️ Timing

Total: 676ms | Queries: -

📄 Records

TypeCountSample Data
A192.42.15.42
NS4b.ns.selectel.ru, a.ns.selectel.ru...
MX1mail.bstudy.ru (pri: 10)
TXT2v=spf1 mx -all, google-site-verification=R0Ov5RpWosyOi5L
SOA1a.ns.selectel.ru support.selectel.ru

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (d.ns.selectel.ru, c.ns.selectel.ru, b.ns.selectel.ru...)

Analysis

Hierarchy

bstudy.ru serves as the parent of mail.bstudy.ru.

IP Addresses

bstudy.ru points to a single IP number: 92.42.15.42.

mail.hubthe.team, hubthe.team, b-study.ru and mail.bstudy.ru are examples of host names that share IP numbers with bstudy.ru.

Name Servers

bstudy.ru has four authoritative name servers: a.ns.selectel.ru, b.ns.selectel.ru, c.ns.selectel.ru and d.ns.selectel.ru.

bstudy.ru has at least partial name server overlap with other domains, such as smolschool.ru, proshoper.ru, duox.ru and two others.

ns3-l2.nic.ru, ns4-l2.nic.ru and ns1.baz-on.ru — plus 3 other name servers — are commonly paired with these name servers.

a.ns.selectel.ru, b.ns.selectel.ru, c.ns.selectel.ru and d.ns.selectel.ru all point to exactly two IP numbers each: a.ns.selectel.ru → 188.68.203.1 and 2a00:ab00:800::2:53; b.ns.selectel.ru → 77.223.114.2 and 2a00:ab00:801::2:53; c.ns.selectel.ru → 188.68.203.3 and 2a00:ab00:802::2:53; d.ns.selectel.ru → 77.223.114.4 and 2a00:ab00:803::2:53.

Mail Servers

bstudy.ru has one mail server: mail.bstudy.ru.

bstudy.ru shares its mail server setup with other domains, such as hubthe.team.

mail.bstudy.ru carries a single IP number, which is 92.42.15.42.