act2learn.com - dns.ninja
act2learn.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2001:1568::13🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | php56.web4u.cz | ||||||
| A | 81.91.86.13🇨🇿 WEB4U81.91.80.0/21 | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| A | 2a02:a40:100:28ff::12🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s. | ||||||
| PTR | ns2.web4u.cz | ||||||
| A | 85.207.53.12🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block | ||||||
| PTR | ns2.web4u.cz | ||||||
| NS | ns.web4u.cz | ||||||
| A | 2001:1568:fd::241🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | ns.web4u.cz | ||||||
| A | 185.14.224.241🇨🇿 WEB4U185.14.224.0/23 | ||||||
| PTR | ns.web4u.cz | ||||||
| MX | mx.web4u.cz ⭐ | ||||||
| A | 2001:1568::7012🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | mx.web4u.cz | ||||||
| A | 81.91.87.12🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | mx.web4u.cz | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2015-05-06 #1 | ||||||
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=1784267157 | ||||||
Same first word
Similar names
DNS History
6 records (5 active, 1 former)
○MXmail.act2learn.com2015-07-26 → 2017-02-13 · 4 obs
● 2017-02-13 19:42:54
○ 2026-04-01 08:39:42
○ 2026-07-17 05:52:50
●MXmx.web4u.cz2026-04-01 → 2026-07-17 · 3 obs
● 2026-04-01 08:39:42
● 2026-07-17 05:52:50
●A2001:1568::132015-07-26 → 2026-07-17 · 2 obs
● 2026-07-17 05:52:50
●A81.91.86.132015-07-26 → 2026-07-17 · 2 obs
● 2026-07-17 05:52:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| act2learn.com | ns.web4u.cz, ns2.web4u.cz | - |
✅ Authoritative Response
Server:185.14.224.241
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for act2learn.com (unsigned zone)
⏱️ Timing
Total: 711ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.13 |
| AAAA | 1 | 2001:1568::13 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mx.web4u.cz (pri: 10) |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
Analysis
IP Addresses
act2learn.com has two IP addresses: 81.91.86.13 and 2001:1568::13
Two other host names, along with zafido.cz, www.repelentpredator.at and pakry.cz, also share IP numbers with act2learn.com.
Name Servers
act2learn.com uses two name servers for its delegation: ns2.web4u.cz and ns.web4u.cz.
act2learn.com shares its NS records with other domains, for example rekosan.cz, steptrans.eu, kytarovka.cz and two others.
The two host names ns2.web4u.cz and ns.web4u.cz each have a pair of IP addresses: ns2.web4u.cz has 85.207.53.12 and 2a02:a40:100:28ff::12, and ns.web4u.cz has 185.14.224.241 and 2001:1568:fd::241.
Mail Servers
The sole mail server for act2learn.com is mx.web4u.cz.
Among the domains sharing a mail server setup with act2learn.com are glasmarte.cz, hotel-grandmajestic.com, tiskjednoduse.org and two others.
mx.web4u.cz resolves to two IP numbers — 81.91.87.12 and 2001:1568::7012.