client4u.at - robtex.com
client4u.at
at
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | dns.nic.at ⭐ | ||||||
| NS | d.ns.at | ||||||
| NS | j.ns.at | ||||||
| NS | n.ns.at | ||||||
| NS | ns1.univie.ac.at | ||||||
| NS | ns2.univie.ac.at | ||||||
| NS | r.ns.at | ||||||
| NS | u.ns.at | ||||||
| SOA | dns.nic.atdomain-admin@univie.ac.at serial=1777194003 | ||||||
Subdomains
mail.client4u.at |
Same first word
DNS History
6 records (4 active, 2 former)
●NSns1.world4you.at2015-07-08 → 2026-04-26 · 2 obs
● 2026-04-26 09:33:14
●NSns2.world4you.at2015-07-08 → 2026-04-26 · 2 obs
● 2026-04-26 09:33:14
●MXclient4u-at.mail.protection.outlook.com2017-04-04 → 2026-04-26 · 3 obs
● 2017-04-04 23:29:40
● 2026-04-26 09:33:14
○MXmail.client4u.at2015-07-08 → 2016-07-20 · 4 obs
● 2016-07-20 13:31:56
○ 2017-04-04 23:29:40
○ 2026-04-26 09:33:14
○A81.19.145.1672015-07-08 → 2017-04-04 · 4 obs
● 2017-04-04 23:29:40
○ 2026-02-15 12:37:42
○ 2026-04-26 09:33:14
●A81.19.159.972026-02-15 → 2026-04-26 · 3 obs
● 2026-02-15 12:37:42
● 2026-04-26 09:33:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| at | d.ns.at, j.ns.at, n.ns.at, r.ns.at... | - |
| client4u.at | ns2.world4you.at, ns1.world4you.at | - |
✅ Authoritative Response
Server:185.132.32.253
NS records: ns2.world4you.at, ns1.world4you.at
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 732ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.19.159.97 |
| NS | 2 | ns2.world4you.at, ns1.world4you.at |
| MX | 1 | client4u-at.mail.protection.outlook.com |
| TXT | 2 | v=spf1 include:spf.protection.outlook.co, MS=ms29615366 |
| SOA | 1 | ns1.world4you.at hostmaster.world4you.co |
Analysis
Hierarchy
client4u.at is parent of mail.client4u.at.
IP Addresses
client4u.at points to a single IP: 81.19.159.97.
Other host names, for instance sitcon.at, www.tanzschrift.at, www.ds-consult.at, haaghof-ertl.at and www.airedales.at share IP numbers with client4u.at.
Name Servers
client4u.at's delegation is to two name servers ns1.world4you.at and ns2.world4you.at.
client4u.at shares the same name server configuration as other domains, such as rt7.at, elearninginstitut.com, schiekmetall.at, cultus.at and trybek.at.
Host names with two IP numbers: ns1.world4you.at points to 2607:f1c0:fe:53:185:132:32:253 and 185.132.32.253; ns2.world4you.at points to 2001:8d8:fe:53:217:160:82:253 and 217.160.82.253
Mail Servers
client4u.at is served by a single mail server, client4u-at.mail.protection.outlook.com.
The host name client4u-at.mail.protection.outlook.com resolves to eight IP numbers: 2a01:111:f403:ca04::9, 2a01:111:f403:ca04::c, 2a01:111:f403:ca09::1, 2a01:111:f403:ca09::9, 52.101.68.25, 52.101.73.15, 52.101.73.16 and 52.101.73.30.