computersystems4u.net - robtex.com
computersystems4u.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.19.159.17🇦🇹 IONOS-AS81.19.144.0/20 World4You.com | ||||||
| PTR | www17sni.world4you.com | ||||||
| NS | ns1.world4you.at ⭐ | ||||||
| A | 2607:f1c0:fe:53:185:132:32:253🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US | ||||||
| PTR | ns1.world4you.at | ||||||
| A | 185.132.32.253🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS) | ||||||
| PTR | ns1.world4you.at | ||||||
| NS | ns2.world4you.at | ||||||
| A | 2001:8d8:fe:53:217:160:82:253🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific | ||||||
| PTR | ns2.world4you.at | ||||||
| A | 217.160.82.253🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific | ||||||
| PTR | ns2.world4you.at | ||||||
| MX | mail.computersystems4u.net ⭐ | ||||||
| A | 81.19.149.31🇦🇹 IONOS-AS81.19.144.0/20 World4You.com | ||||||
| PTR | mail14.world4you.com | ||||||
| TXT | v=spf1 mx include:spf.w4ymail.at -all | ||||||
| SOA | ns1.world4you.athostmaster@world4you.com 2025-03-19 #4 | ||||||
net
| 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=1774734227 | ||||||
Subdomains
mail.computersystems4u.net |
Same first word
computersystems4u.net |
DNS History
5 records (4 active, 1 former)
●NSns1.world4you.at2015-05-22 → 2026-03-28 · 2 obs
● 2026-03-28 22:10:02
●NSns2.world4you.at2015-05-22 → 2026-03-28 · 2 obs
● 2026-03-28 22:10:02
●MXmail.computersystems4u.net2015-05-22 → 2026-03-28 · 2 obs
● 2026-03-28 22:10:02
○A81.19.145.372015-05-22 → 2017-03-17 · 4 obs
● 2017-03-17 22:19:00
○ 2020-01-07 21:47:58
○ 2026-03-28 22:10:02
●A81.19.159.172020-01-07 → 2026-03-28 · 3 obs
● 2020-01-07 21:47:58
● 2026-03-28 22:10:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| computersystems4u.net | ns1.world4you.at, ns2.world4you.at | - |
✅ Authoritative Response
Server:217.160.82.253
NS records: ns1.world4you.at, ns2.world4you.at
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for computersystems4u.net (unsigned zone)
⏱️ Timing
Total: 851ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.19.159.17 |
| NS | 2 | ns2.world4you.at, ns1.world4you.at |
| MX | 1 | mail.computersystems4u.net (pri: 10) |
| TXT | 1 | v=spf1 mx include:spf.w4ymail.at -all |
| SOA | 1 | ns1.world4you.at hostmaster.world4you.co |
Analysis
Hierarchy
computersystems4u.net is a parent of mail.computersystems4u.net.
IP Addresses
computersystems4u.net points to a single IP number: 81.19.159.17.
Other host names, for instance craft-up.com, dr-schmidt.co.at, woern.at, danubia.wien and sulpicius.at share IP numbers with computersystems4u.net.
Name Servers
Delegation for computersystems4u.net rests with two name servers, ns1.world4you.at and ns2.world4you.at.
computersystems4u.net shares the same name server setup as other domains, including elektronotfall-linz.at, steyrer.co.at, egw-linz.at, bachler2.at and promtech.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
computersystems4u.net is handled by a single mail server, mail.computersystems4u.net.
mail.computersystems4u.net points to a single IP: 81.19.149.31.