u-online.com - robtex.com
u-online.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.169.206.193🇩🇪 STRATO81.169.128.0/17 AG | ||||||
| PTR | dns1.4u-hosting.com | ||||||
| NS | dns2.4u-hosting.com ⭐ | ||||||
| A | 85.214.116.88🇩🇪 STRATO85.214.0.0/15 AG | ||||||
| PTR | dns2.4u-hosting.com | ||||||
| NS | dns1.4u-hosting.com | ||||||
| A | 81.169.206.193🇩🇪 STRATO81.169.128.0/17 AG | ||||||
| PTR | dns1.4u-hosting.com | ||||||
| MX | mail.u-online.com ⭐ | ||||||
| A | 81.169.206.193🇩🇪 STRATO81.169.128.0/17 AG | ||||||
| PTR | dns1.4u-hosting.com | ||||||
| TXT | v=spf1 +a +mx -all +a:dns1.4u-hosting.com | ||||||
| SOA | dns2.4u-hosting.comckn19341@gmail.com 2026-03-16 #1 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1776133967 | ||||||
Subdomains
mail.u-online.com |
Same first word
Similar names
DNS History
12 records (4 active, 8 former)
○NSdns1.4u-dns.com2007-10-23 → 2007-10-23 · 3 obs
○ 2015-05-21 00:12:26
○ 2026-04-14 03:02:18
●NSdns1.4u-hosting.com2026-04-10 → 2026-04-14 · 3 obs
● 2026-04-10 10:55:04
● 2026-04-14 03:02:18
●NSdns2.4u-hosting.com2026-04-10 → 2026-04-14 · 3 obs
● 2026-04-10 10:55:04
● 2026-04-14 03:02:18
○NSns1.4u-dns.com2015-05-21 → 2015-05-21 · 4 obs
● 2015-05-21 00:12:26
○ 2015-10-16 15:04:12
○ 2026-04-14 03:02:18
○NSns2.4u-dns.com2007-10-23 → 2015-05-21 · 4 obs
● 2015-05-21 00:12:26
○ 2015-10-16 15:04:12
○ 2026-04-14 03:02:18
○NSsns1.4u-dns.com2015-10-16 → 2017-08-06 · 8 obs
● 2015-10-16 15:04:12
○ 2015-12-20 23:07:42
○ 2016-04-07 20:59:14
● 2016-11-30 08:10:56
● 2017-08-06 17:41:20
○ 2026-04-10 10:55:04
○ 2026-04-14 03:02:18
○NSsns2.4u-dns.com2015-10-16 → 2017-08-06 · 7 obs
● 2015-10-16 15:04:12
● 2016-04-07 20:59:14
○ 2016-11-30 08:10:56
● 2017-08-06 17:41:20
○ 2026-04-10 10:55:04
○ 2026-04-14 03:02:18
●MXmail.u-online.com2007-10-23 → 2026-04-14 · 2 obs
● 2026-04-14 03:02:18
○A77.95.227.1202015-05-21 → 2015-05-21 · 4 obs
● 2015-05-21 00:12:26
○ 2015-10-16 15:04:12
○ 2026-04-14 03:02:18
●A81.169.206.1932026-04-10 → 2026-04-14 · 3 obs
● 2026-04-10 10:55:04
● 2026-04-14 03:02:18
○A82.94.213.512007-10-23 → 2007-10-23 · 3 obs
○ 2015-05-21 00:12:26
○ 2026-04-14 03:02:18
○A85.214.156.2462015-10-16 → 2017-08-06 · 5 obs
● 2015-10-16 15:04:12
● 2017-08-06 17:41:20
○ 2026-04-10 10:55:04
○ 2026-04-14 03:02:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| u-online.com | dns1.4u-hosting.com, dns2.4u-hosting.com | 2 records |
✅ Authoritative Response
Server:85.214.116.88
NS records: dns1.4u-hosting.com, dns2.4u-hosting.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for u-online.com (unsigned zone)
⏱️ Timing
Total: 369ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.169.206.193 |
| NS | 2 | dns1.4u-hosting.com, dns2.4u-hosting.com |
| MX | 1 | mail.u-online.com (pri: 10) |
| TXT | 1 | v=spf1 +a +mx -all +a:dns1.4u-hosting.co |
| SOA | 1 | dns2.4u-hosting.com ckn19341.gmail.com |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (dns1.4u-hosting.com, dns2.4u-hosting.com)
Analysis
Hierarchy
The parent of mail.u-online.com is u-online.com.
IP Addresses
u-online.com points to IP number: 81.169.206.193.
Other host names such as mail.enzymeenergy.nl, mail.yod.nu, mail.u-online.com, dns1.4u-hosting.com and yod.nu share IPs with u-online.com.
Name Servers
u-online.com is delegated to two name servers: dns1.4u-hosting.com and dns2.4u-hosting.com.
u-online.com shares the same name server setup as digitalekantoor.nl, 4u-hosting.com, yod.nu, artproduction.nl and enzyme-energy.nl.
Host names with a single IP:
dns1.4u-hosting.com points to 81.169.206.193.
dns2.4u-hosting.com points to 85.214.116.88.
Mail Servers
u-online.com is handled by a single mail server, mail.u-online.com.
mail.u-online.com points to a single IP: 81.169.206.193.