mail.cos.ru - robtex.com
mail.cos.ru
cos.ru
| DNSSEC | ⚠️ Not signed | ||||||
| A | 212.158.164.110🇷🇺 AS-REGRU212.158.164.0/24 SDC network | ||||||
| NS | dns1.yandex.net ⭐ | ||||||
| NS | dns2.yandex.net | ||||||
| MX | mx.yandex.net ⭐ | ||||||
| TXT | v=spf1 redirect=_spf.yandex.net | ||||||
| SOA | dns1.yandex.netdns-hosting@yandex.ru serial=14 | ||||||
MX for
Previously MX for
Same first word
Similar names
DNS History
6 records (1 active, 5 former)
○MXdao.cos.ru2015-08-29 → 2020-11-27 · 4 obs
● 2020-11-27 05:59:48
○ 2026-03-18 02:32:58
○ 2026-04-26 17:33:16
○MXmail.cos.ru2015-08-29 → 2020-11-27 · 4 obs
● 2020-11-27 05:59:48
○ 2026-03-18 02:32:58
○ 2026-04-26 17:33:16
○MXrelay-mta.cos.ru2015-08-29 → 2020-11-27 · 4 obs
● 2020-11-27 05:59:48
○ 2026-03-18 02:32:58
○ 2026-04-26 17:33:16
○MXrelay-mtc.cos.ru2015-08-29 → 2020-11-27 · 4 obs
● 2020-11-27 05:59:48
○ 2026-03-18 02:32:58
○ 2026-04-26 17:33:16
○A81.5.113.732015-08-29 → 2020-11-27 · 4 obs
● 2020-11-27 05:59:48
○ 2026-03-18 02:32:58
○ 2026-04-26 17:33:16
●CNAMEdomain.mail.yandex.net2026-03-18 → 2026-04-26 · 2 obs
● 2026-04-26 17:33:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ru | a.dns.ripn.net, b.dns.ripn.net, d.dns.ripn.net, e.dns.ripn.net... | - |
| cos.ru | 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 cos.ru (unsigned zone)
⏱️ Timing
Total: 1250ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| CNAME | 1 | domain.mail.yandex.net |
Analysis
Mail Server Role
The mail server for cos-ht.eu and cos-ht.cz is mail.cos.ru.
dao2.cos.ru, dao.cos.ru and relay-mta.cos.ru are commonly used as mail servers together with mail.cos.ru.
IP Addresses
mail.cos.ru points to two IP numbers: 2a02:6b8::a4 and 77.88.21.37.
Other host names such as mail.yandex, mail.damlahosting.com, mail.yandex.com, mail.varioparke.net and mail.yandex.lv share IP numbers with mail.cos.ru.
Name Servers
mail.cos.ru is delegated to two name servers: ns3.yandex.ru and ns4.yandex.ru.
mail.cos.ru uses the same name server setup as other domains, including 72avto.ru, ppc.yandex.ru, 61.88.77.in-addr.arpa, music.ya.ru and disk.yandex.tj.
mail.cos.ru shares name servers with other domains, at least partially; for example zombie.yandex.net and cern.yandex.net.
Host names with two IP numbers:
ns3.yandex.ru points to 2a02:6b8::1001 and 87.250.250.1.
ns4.yandex.ru points to 2a02:6b8:0:1::1:1 and 77.88.21.1.
Mail Servers
The mail server for mail.cos.ru is mx.yandex.ru.
mail.cos.ru uses the same mail server setup as other domains, for instance rybohot.ru, testprom.com, sufiya.ru, alfasib.ru and www.marafon.biz.
mail.cos.ru shares mail servers with other domains to some extent, for instance blesk-k.ru, mkad78.ru, prom1.kz and pateroclinic.ru.
Hostname mx.yandex.ru resolves to two IPs: 2a02:6b8::311 and 77.88.21.249.