coding4u.at - dns.ninja
coding4u.at
| DNSSEC | ⚠️ Not signed | ||||||
| A | 138.199.137.102🇩🇪 Hetzner138.199.128.0/17 HETZNER-DC | ||||||
| PTR | host127.dwhost.net | ||||||
| NS | dns1.dwhost.net ⭐ | ||||||
| A | 85.159.213.38🇬🇧 AKAMAI-LINODE-AP85.159.208.0/21 Akamai Technologies | ||||||
| PTR | dns1.dwhost.net | ||||||
| NS | dns2.dwhost.net | ||||||
| A | 94.237.111.102🇳🇱 UPCLOUD94.237.108.0/22 -NL-AMS1-NET | ||||||
| PTR | dns2.dwhost.net | ||||||
| NS | dns3.dwhost.net | ||||||
| A | 162.55.68.152🇩🇪 Hetzner162.55.0.0/16 HETZNER-DC | ||||||
| PTR | dns3.dwhost.net | ||||||
| MX | mail.coding4u.at ⭐ | ||||||
| TXT | v=spf1 ip4:138.199.137.102 ip4:188.40.21.44 +a +mx ~all | ||||||
| SOA | dns1.dwhost.netadmin@dreamweb.rs 2026-07-28 #1 | ||||||
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=1785956402 | ||||||
Subdomains
mail.coding4u.at |
Same first word
DNS History
5 records (5 active, 0 former)
●NSdns1.dwhost.net2026-03-25 → 2026-08-05 · 2 obs
● 2026-08-05 19:23:58
●NSdns2.dwhost.net2026-03-25 → 2026-08-05 · 2 obs
● 2026-08-05 19:23:58
●NSdns3.dwhost.net2026-03-25 → 2026-08-05 · 2 obs
● 2026-08-05 19:23:58
●MXmail.coding4u.at2026-03-25 → 2026-08-05 · 2 obs
● 2026-08-05 19:23:58
●A138.199.137.1022026-03-25 → 2026-08-05 · 2 obs
● 2026-08-05 19:23:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| at | d.ns.at, j.ns.at, n.ns.at, r.ns.at... | - |
| coding4u.at | dns3.dwhost.net, dns2.dwhost.net, dns1.dwhost.net | - |
✅ Authoritative Response
Server:85.159.213.38
NS records: dns3.dwhost.net, dns2.dwhost.net, dns1.dwhost.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coding4u.at (unsigned zone)
⏱️ Timing
Total: 799ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 138.199.137.102 |
| NS | 3 | dns3.dwhost.net, dns2.dwhost.net... |
| MX | 1 | mail.coding4u.at (pri: 0) |
| TXT | 1 | v=spf1 ip4:138.199.137.102 ip4:188.40.21 |
| SOA | 1 | dns1.dwhost.net admin.dreamweb.rs |
Analysis
Hierarchy
mail.coding4u.at is a subdomain of coding4u.at.
IP Addresses
coding4u.at resolves to one IP address: 138.199.137.102.
mail.dbj.org, lovackaprodavnica.com, mail.stilluxnamestaj.rs and two other host names share IP numbers with coding4u.at.
Name Servers
DNS for coding4u.at is handled by three authoritative name servers: dns1.dwhost.net, dns2.dwhost.net and dns3.dwhost.net.
The name servers of coding4u.at overlap at least partially with those of other domains — among them autogocadoo.rs, icsa.rs, vitezsertifikacija.rs and two more.
dns1.dwhost.net, dns2.dwhost.net and dns3.dwhost.net all have one IP address each — dns1.dwhost.net directs to 85.159.213.38, dns2.dwhost.net directs to 94.237.111.102 and dns3.dwhost.net directs to 162.55.68.152.
Mail Servers
Mail for coding4u.at is handled by a single mail server, mail.coding4u.at.