4usr.ru - robtex.com
4usr.ru
| DNSSEC | ⚠️ Not signed | ||||||
| A | 87.228.42.57🇷🇺 SELECTEL87.228.40.0/22 Selectel Route Object | ||||||
| NS | a.ns.selectel.ru ⭐ | ||||||
| A | 2a00:ab00:800::2:53🇷🇺 SELECTEL2a00:ab00::/32 Selectel IPv6 | ||||||
| A | 188.68.203.1🇷🇺 SELECTEL188.68.203.0/24 Selectel Route Object | ||||||
| PTR | a.ns.selectel.ru | ||||||
| NS | b.ns.selectel.ru | ||||||
| A | 2a00:ab00:801::2:53🇷🇺 SELECTEL2a00:ab00::/32 Selectel IPv6 | ||||||
| A | 77.223.114.2🇷🇺 SELECTEL77.223.114.0/24 Selectel Route Object | ||||||
| PTR | b.ns.selectel.ru | ||||||
| NS | c.ns.selectel.ru | ||||||
| A | 2a00:ab00:802::2:53🇷🇺 SELECTEL2a00:ab00::/32 Selectel IPv6 | ||||||
| A | 188.68.203.3🇷🇺 SELECTEL188.68.203.0/24 Selectel Route Object | ||||||
| PTR | c.ns.selectel.ru | ||||||
| NS | d.ns.selectel.ru | ||||||
| A | 2a00:ab00:803::2:53🇷🇺 SELECTEL2a00:ab00::/32 Selectel IPv6 | ||||||
| A | 77.223.114.4🇷🇺 SELECTEL77.223.114.0/24 Selectel Route Object | ||||||
| PTR | d.ns.selectel.ru | ||||||
| MX | 4usr.ru ⭐ | ||||||
| A | 87.228.42.57🇷🇺 SELECTEL87.228.40.0/22 Selectel Route Object | ||||||
| TXT | v=spf1 ip4:87.228.42.59 -all | ||||||
| SOA | a.ns.selectel.rusupport@selectel.ru 2026-03-22 #2 | ||||||
ru
| 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=4068315 | ||||||
MX for
4usr.ru |
Same first word
4usr.ru |
Similar names
DNS History
6 records (6 active, 0 former)
●NSa.ns.selectel.ru2026-03-24 → 2026-03-29 · 2 obs
● 2026-03-29 06:08:10
●NSb.ns.selectel.ru2026-03-24 → 2026-03-29 · 2 obs
● 2026-03-29 06:08:10
●NSc.ns.selectel.ru2026-03-24 → 2026-03-29 · 2 obs
● 2026-03-29 06:08:10
●NSd.ns.selectel.ru2026-03-24 → 2026-03-29 · 2 obs
● 2026-03-29 06:08:10
●MX4usr.ru2026-03-24 → 2026-03-29 · 2 obs
● 2026-03-29 06:08:10
●A87.228.42.572026-03-24 → 2026-03-29 · 2 obs
● 2026-03-29 06:08:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ru | d.dns.ripn.net, f.dns.ripn.net, a.dns.ripn.net, b.dns.ripn.net... | - |
| 4usr.ru | a.ns.selectel.ru, b.ns.selectel.ru, c.ns.selectel.ru, d.ns.selectel.ru | 4 records |
✅ Authoritative Response
Server:77.223.114.4
NS records: a.ns.selectel.ru, b.ns.selectel.ru, c.ns.selectel.ru, d.ns.selectel.ru
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 4usr.ru (unsigned zone)
⏱️ Timing
Total: 857ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 87.228.42.57 |
| NS | 4 | d.ns.selectel.ru, b.ns.selectel.ru... |
| MX | 1 | 4usr.ru (pri: 10) |
| TXT | 1 | v=spf1 ip4:87.228.42.59 -all |
| SOA | 1 | a.ns.selectel.ru support.selectel.ru |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (a.ns.selectel.ru, b.ns.selectel.ru, c.ns.selectel.ru...)
Analysis
Mail Server Role
4usr.ru serves as the mail server for 4usr.ru.
IP Addresses
4usr.ru points to an IP address: 87.228.42.57.
Name Servers
4usr.ru delegates to four name servers: a.ns.selectel.ru, b.ns.selectel.ru, c.ns.selectel.ru and d.ns.selectel.ru.
4usr.ru at least partially shares name servers with other domains, for instance printut.ru, glavort.ru, pravorg.ru, ld-info.ru and legal-registratsia.ru.
Host names with two IP numbers: a.ns.selectel.ru points to 2a00:ab00:800::2:53 and 188.68.203.1; b.ns.selectel.ru points to 2a00:ab00:801::2:53 and 77.223.114.2; c.ns.selectel.ru points to 2a00:ab00:802::2:53 and 188.68.203.3; d.ns.selectel.ru points to 2a00:ab00:803::2:53 and 77.223.114.4.
Mail Servers
4usr.ru is handled by a single mail server.
The host name 4usr.ru points to IP 87.228.42.57.