sci4u.com - robtex.com
sci4u.com
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=1774454997 | ||||||
Subdomains
www.sci4u.com |
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●NSns.forpsi.net2015-08-17 → 2026-03-25 · 2 obs
● 2026-03-25 16:29:34
●MX013305e4de4642d7.mx1.emailprofi.seznam.cz2026-03-18 → 2026-03-25 · 2 obs
● 2026-03-25 16:29:34
●MX013305e4de4642d7.mx2.emailprofi.seznam.cz2026-03-18 → 2026-03-25 · 2 obs
● 2026-03-25 16:29:34
●A81.2.194.1532015-08-17 → 2026-03-25 · 2 obs
● 2026-03-25 16:29:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| sci4u.com | ns.forpsi.net, ns.forpsi.us, ns.forpsi.cz | - |
✅ Authoritative Response
Server:95.110.254.165
NS records: ns.forpsi.net, ns.forpsi.us, ns.forpsi.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 777ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.2.194.153 |
| NS | 3 | ns.forpsi.cz, ns.forpsi.us... |
| MX | 2 | 013305e4de4642d7.mx1.emailprofi.seznam.c, 013305e4de4642d7.mx2.emailprofi.seznam.c |
| SOA | 1 | ns.forpsi.net admin.forpsi.net |
Analysis
Hierarchy
sci4u.com is the parent of www.sci4u.com.
IP Addresses
sci4u.com points to IP number 81.2.194.153.
For instance, other host names bokr.net, eduweb.cz, jakub.name, c153ui.forpsi.com and petraltman.com share IP numbers with sci4u.com.
Name Servers
The delegation for sci4u.com is handled by three name servers: ns.forpsi.cz, ns.forpsi.net and ns.forpsi.us.
sci4u.com shares name servers with other domains at least partially, for example ouskripov.eu, webmediagroup.cz, infowave.cz, mirascz.eu and npdy.cz.
These name servers are commonly used with the name servers ns.forpsi.it and ns.forpsi.cn.
Host names with two IPs:
ns.forpsi.cz points to 2001:15e8:201:1::d1b9 and 81.2.209.185
ns.forpsi.net points to 2001:15e8:101:1::c282 and 81.2.194.130
ns.forpsi.us points to 2a00:6d41:2:1::5 and 95.110.254.165
Mail Servers
Two mail servers 013305e4de4642d7.mx1.emailprofi.seznam.cz and 013305e4de4642d7.mx2.emailprofi.seznam.cz handle sci4u.com.
Host names with two IP numbers:
013305e4de4642d7.mx1.emailprofi.seznam.cz points to 2a02:598:2::1056 and 77.75.77.56; 013305e4de4642d7.mx2.emailprofi.seznam.cz points to 2a02:598:2::1146 and 77.75.77.146.