sci4u.org - robtex.com
sci4u.org
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 81.2.196.19🇨🇿 INTERNET-CZ81.2.192.0/18 INTERNET CZ, a.s. | ||||||
| PTR | 19.196.forpsi.net | ||||||
| NS | ns.forpsi.net ⭐ | ||||||
| A | 2001:15e8:101:1::c282🇨🇿 INTERNET-CZ2001:15e8::/32 | ||||||
| PTR | ns.forpsi.net | ||||||
| A | 81.2.194.130🇨🇿 INTERNET-CZ81.2.192.0/18 INTERNET CZ, a.s. | ||||||
| PTR | ns.forpsi.net | ||||||
| NS | ns.forpsi.cz | ||||||
| A | 2001:15e8:201:1::d1b9🇨🇿 INTERNET-CZ2001:15e8::/32 | ||||||
| PTR | ns.forpsi.cz | ||||||
| A | 81.2.209.185🇨🇿 INTERNET-CZ81.2.209.0/24 | ||||||
| PTR | ns.forpsi.cz | ||||||
| NS | ns.forpsi.us | ||||||
| A | 2a00:6d41:2:1::5🇮🇹 ARUBA-ASN2a00:6d41::/32 Aruba S.p.A. IPv6 Network | ||||||
| PTR | ns.forpsi.it | ||||||
| A | 95.110.254.165🇮🇹 ARUBA-ASN95.110.192.0/18 Aruba S.p.A. Network | ||||||
| PTR | host165-254-110-95.serverdedicati.aruba.it | ||||||
| SOA | ns.forpsi.netadmin@forpsi.net 2026-02-28 #1 | ||||||
org
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation | ||||||
| NS | a2.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | b0.org.afilias-nst.org | ||||||
| NS | b2.org.afilias-nst.org | ||||||
| NS | c0.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | d0.org.afilias-nst.org | ||||||
| SOA | a0.org.afilias-nst.infohostmaster@donuts.email serial=1774400712 | ||||||
Same first word
Similar names
DNS History
5 records (4 active, 1 former)
●NSns.forpsi.net2015-05-27 → 2026-03-25 · 2 obs
● 2026-03-25 01:17:46
○A81.2.194.1282015-05-27 → 2017-08-06 · 4 obs
● 2017-08-06 17:32:14
○ 2026-03-14 15:33:30
○ 2026-03-25 01:17:46
●A81.2.196.192026-03-14 → 2026-03-25 · 3 obs
● 2026-03-14 15:33:30
● 2026-03-25 01:17:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org | - |
| sci4u.org | ns.forpsi.cz, ns.forpsi.net, ns.forpsi.us | - |
✅ Authoritative Response
Server:81.2.209.185
NS records: ns.forpsi.cz, ns.forpsi.net, ns.forpsi.us
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 871ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.2.196.19 |
| NS | 3 | ns.forpsi.cz, ns.forpsi.us... |
| SOA | 1 | ns.forpsi.net admin.forpsi.net |
Analysis
IP Addresses
sci4u.org maps to IP address 81.2.196.19.
Other host names, for instance expowin.pl, f4b.eu, meemo.cz, liberland.cz and hermanova.cz share IP numbers with sci4u.org.
Name Servers
sci4u.org is delegated to name servers ns.forpsi.cz, ns.forpsi.net and ns.forpsi.us.
sci4u.org at least partially shares name servers with other domains such as arioso.sk, jakubdvorak.cz, prakokyjov.cz, webnt.dev and economycarbook.com.
these name servers are commonly used with the name servers ns.forpsi.it.
Host names with two IP numbers:
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.