duo.su - robtex.com
duo.su
| DNSSEC | ⚠️ Not signed | ||||||
| NS | dns1.yandex.net ⭐ | ||||||
| A | 2a02:6b8::213🇷🇺 TELETECH2a02:6b8::/32 Yandex network | ||||||
| PTR | dns1.yandex.net | ||||||
| A | 213.180.204.213🇷🇺 TELETECH213.180.192.0/19 Yandex network | ||||||
| PTR | dns1.yandex.net | ||||||
| NS | dns2.yandex.net | ||||||
| A | 2a02:6b8:0:1::213🇷🇺 TELETECH2a02:6b8::/32 Yandex network | ||||||
| PTR | dns2.yandex.net | ||||||
| A | 93.158.134.213🇷🇺 TELETECH93.158.128.0/18 Yandex enterprise network | ||||||
| PTR | dns2.yandex.net | ||||||
| MX | mx.yandex.net ⭐ | ||||||
| A | 2a02:6b8::311🇷🇺 TELETECH2a02:6b8::/32 Yandex network | ||||||
| PTR | mxfront.stable.qloud-b.yandex.net | ||||||
| A | 77.88.21.249🇷🇺 TELETECH77.88.0.0/18 Yandex enterprise network | ||||||
| PTR | mxfront.stable.qloud-b.yandex.net | ||||||
| TXT | v=spf1 redirect=_spf.yandex.net | ||||||
| SOA | dns1.yandex.netdns-hosting@yandex.ru serial=5 | ||||||
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=650209037 | ||||||
Same first word
Similar names
DNS History
19 records (3 active, 16 former)
●NSdns1.yandex.net2026-02-28 → 2026-05-09 · 3 obs
● 2026-02-28 04:25:32
● 2026-05-09 15:05:02
●NSdns2.yandex.net2026-02-28 → 2026-05-09 · 3 obs
● 2026-02-28 04:25:32
● 2026-05-09 15:05:02
○NSisp.duo.su2016-04-27 → 2017-01-09 · 5 obs
● 2016-04-27 14:58:36
● 2017-01-09 10:43:58
○ 2021-03-21 20:15:06
○ 2026-05-09 15:05:02
○NSisp.itbuben.ru2021-03-21 → 2021-09-22 · 5 obs
● 2021-03-21 20:15:06
● 2021-09-22 07:33:16
○ 2026-02-28 04:25:32
○ 2026-05-09 15:05:02
○NSns1.duo.su2016-04-27 → 2017-01-09 · 5 obs
● 2016-04-27 14:58:36
● 2017-01-09 10:43:58
○ 2021-03-21 20:15:06
○ 2026-05-09 15:05:02
○NSns1.itbuben.ru2021-03-21 → 2021-09-22 · 5 obs
● 2021-03-21 20:15:06
● 2021-09-22 07:33:16
○ 2026-02-28 04:25:32
○ 2026-05-09 15:05:02
○NSns2.duo.su2016-04-27 → 2017-01-09 · 5 obs
● 2016-04-27 14:58:36
● 2017-01-09 10:43:58
○ 2021-03-21 20:15:06
○ 2026-05-09 15:05:02
○NSns2.itbuben.ru2021-03-21 → 2021-09-22 · 5 obs
● 2021-03-21 20:15:06
● 2021-09-22 07:33:16
○ 2026-02-28 04:25:32
○ 2026-05-09 15:05:02
○NSns3.nic.ru2015-08-09 → 2016-04-19 · 4 obs
● 2016-04-19 11:49:30
○ 2016-04-27 14:58:36
○ 2026-05-09 15:05:02
○NSns4.nic.ru2015-08-09 → 2016-04-19 · 4 obs
● 2016-04-19 11:49:30
○ 2016-04-27 14:58:36
○ 2026-05-09 15:05:02
○NSns8.nic.ru2015-08-09 → 2016-04-19 · 4 obs
● 2016-04-19 11:49:30
○ 2016-04-27 14:58:36
○ 2026-05-09 15:05:02
○MXmail.duo.su2016-04-27 → 2017-01-09 · 5 obs
● 2016-04-27 14:58:36
● 2017-01-09 10:43:58
○ 2021-03-21 20:15:06
○ 2026-05-09 15:05:02
●MXmx.yandex.net2021-03-21 → 2026-05-09 · 3 obs
● 2021-03-21 20:15:06
● 2026-05-09 15:05:02
○MXmx01.nicmail.ru2015-08-09 → 2016-04-19 · 4 obs
● 2016-04-19 11:49:30
○ 2016-04-27 14:58:36
○ 2026-05-09 15:05:02
○MXmx02.nicmail.ru2015-08-09 → 2016-04-19 · 4 obs
● 2016-04-19 11:49:30
○ 2016-04-27 14:58:36
○ 2026-05-09 15:05:02
○MXmx03.nicmail.ru2015-08-09 → 2016-04-19 · 4 obs
● 2016-04-19 11:49:30
○ 2016-04-27 14:58:36
○ 2026-05-09 15:05:02
○A195.208.1.1332015-08-09 → 2016-04-19 · 4 obs
● 2016-04-19 11:49:30
○ 2016-04-27 14:58:36
○ 2026-05-09 15:05:02
○A213.183.48.142021-03-21 → 2021-09-22 · 5 obs
● 2021-03-21 20:15:06
● 2021-09-22 07:33:16
○ 2026-02-28 04:25:32
○ 2026-05-09 15:05:02
○A213.251.197.772016-04-27 → 2017-01-09 · 5 obs
● 2016-04-27 14:58:36
● 2017-01-09 10:43:58
○ 2021-03-21 20:15:06
○ 2026-05-09 15:05:02
🔍 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 |
| duo.su | dns1.yandex.net, dns2.yandex.net | - |
✅ Authoritative Response
Server:213.180.204.213
NS records: dns1.yandex.net, dns2.yandex.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for duo.su (unsigned zone)
⏱️ Timing
Total: 1319ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | dns1.yandex.net, dns2.yandex.net |
| MX | 1 | mx.yandex.net (pri: 10) |
| TXT | 1 | v=spf1 redirect=_spf.yandex.net |
| SOA | 1 | dns1.yandex.net dns-hosting.yandex.ru |
📌 Glue Records Collected
Total: 10
Out-of-bailiwick: 10 (f.dns.ripn.net, e.dns.ripn.net, d.dns.ripn.net...)
Analysis
Name Servers
duo.su is delegated to two name servers: dns1.yandex.net and dns2.yandex.net.
duo.su uses the same name server setup as other domains, including rpgmoney.ru, rosbolt.ru, btd.su, reklama-54.ru and htcp.ru.
At least part of the name servers for duo.su are shared with other domains, for instance grenkova.ru, optauto.ru, krascompass.ru, host-ing.ru and bdo-rostov.ru.
These name servers are commonly used alongside dns1.yandex.ru and dns2.yandex.ru.
Host names with two IP numbers:
dns1.yandex.net points to 2a02:6b8::213 and 213.180.204.213.
dns2.yandex.net points to 2a02:6b8:0:1::213 and 93.158.134.213.
Mail Servers
The mail server for duo.su is mx.yandex.net.
duo.su uses the same mail server setup as other domains, for instance www.akwrest.ru, coder24.ru, iristoys.ru, fangame.ru and yachting-in-turkey.com.
duo.su shares mail servers with other domains to some extent, for instance timeweed.com, shurup.net.ua, kibanovadolls.ru and joygames.me.
Hostname mx.yandex.net resolves to two IPs: 2a02:6b8::311 and 77.88.21.249.