reef4u.com - robtex.com
reef4u.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 46.28.106.229🇨🇿 WEDOS46.28.104.0/21 Internet, a.s. | ||||||
| PTR | hc1-wd413.wedos.net | ||||||
| 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 | wes1-mx1.wedos.net ⭐ | ||||||
| A | 46.28.106.11🇨🇿 WEDOS46.28.104.0/21 Internet, a.s. | ||||||
| PTR | wes1-mx1.wedos.net | ||||||
| MX | wes1-mx2.wedos.net ⭐ | ||||||
| A | 46.28.106.12🇨🇿 WEDOS46.28.104.0/21 Internet, a.s. | ||||||
| PTR | wes1-mx2.wedos.net | ||||||
| MX | wes1-mx-backup.wedos.net(10) | ||||||
| A | 46.28.106.56🇨🇿 WEDOS46.28.104.0/21 Internet, a.s. | ||||||
| PTR | wes1-mx-backup.wedos.net | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-06-30 #2 | ||||||
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=1774645972 | ||||||
Same first word
reef4u.com |
Similar names
free4u.org |
free4u.cyou |
free4u.co.za |
free4u.de |
free4u.com |
free4u.ca |
free4u.cn |
free4u.ws |
4ufree.info |
free4u.net |
free4u.at |
free4u.pl |
4ufree.com |
free4u.eu |
free4u.cz |
free4u.co |
DNS History
15 records (6 active, 9 former)
●NSns.web4u.cz2026-03-27 → 2026-03-27 · 3 obs
● 2026-03-27 21:37:50
● 2026-03-27 21:37:52
●NSns2.web4u.cz2026-03-27 → 2026-03-27 · 3 obs
● 2026-03-27 21:37:50
● 2026-03-27 21:37:52
○NSns6509.hostgator.com2015-06-03 → 2020-03-16 · 4 obs
● 2020-03-16 10:13:10
○ 2026-03-27 21:37:50
○ 2026-03-27 21:37:52
○NSns6510.hostgator.com2015-06-03 → 2020-03-16 · 4 obs
● 2020-03-16 10:13:10
○ 2026-03-27 21:37:50
○ 2026-03-27 21:37:52
○MXalt1.aspmx.l.google.com2015-06-03 → 2020-03-16 · 4 obs
● 2020-03-16 10:13:10
○ 2026-03-27 21:37:50
○ 2026-03-27 21:37:52
○MXalt2.aspmx.l.google.com2015-06-03 → 2020-03-16 · 4 obs
● 2020-03-16 10:13:10
○ 2026-03-27 21:37:50
○ 2026-03-27 21:37:52
○MXaspmx.l.google.com2015-06-03 → 2020-03-16 · 4 obs
● 2020-03-16 10:13:10
○ 2026-03-27 21:37:50
○ 2026-03-27 21:37:52
○MXaspmx2.googlemail.com2015-06-03 → 2020-03-16 · 4 obs
● 2020-03-16 10:13:10
○ 2026-03-27 21:37:50
○ 2026-03-27 21:37:52
○MXaspmx3.googlemail.com2015-06-03 → 2020-03-16 · 4 obs
● 2020-03-16 10:13:10
○ 2026-03-27 21:37:50
○ 2026-03-27 21:37:52
○MXreef4u.com2015-06-03 → 2020-03-16 · 4 obs
● 2020-03-16 10:13:10
○ 2026-03-27 21:37:50
○ 2026-03-27 21:37:52
●MXwes1-mx-backup.wedos.net2026-03-27 → 2026-03-27 · 3 obs
● 2026-03-27 21:37:50
● 2026-03-27 21:37:52
●MXwes1-mx1.wedos.net2026-03-27 → 2026-03-27 · 3 obs
● 2026-03-27 21:37:50
● 2026-03-27 21:37:52
●MXwes1-mx2.wedos.net2026-03-27 → 2026-03-27 · 3 obs
● 2026-03-27 21:37:50
● 2026-03-27 21:37:52
○A192.254.235.182015-06-03 → 2020-03-16 · 4 obs
● 2020-03-16 10:13:10
○ 2026-03-27 21:37:50
○ 2026-03-27 21:37:52
●A46.28.106.2292026-03-27 → 2026-03-27 · 3 obs
● 2026-03-27 21:37:50
● 2026-03-27 21:37:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| reef4u.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 reef4u.com (unsigned zone)
⏱️ Timing
Total: 850ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 46.28.106.229 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 3 | wes1-mx1.wedos.net (pri: 1), wes1-mx2.wedos.net (pri: 1)... |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
Analysis
IP Addresses
reef4u.com points to a single IP: 46.28.106.229.
Other host names, for instance mail.t-safe.cz, ns.airguntechnology.com, maskerna.cz, allizo.sk and www.pomocvkrizi.com share IP numbers with reef4u.com.
Name Servers
Two name servers ns2.web4u.cz and ns.web4u.cz handle delegation for reef4u.com.
reef4u.com uses the same name server setup as other domains, for example cinematime.cz, impea.cz, service-desk.cz, dhi-app-mail.com and stechnik.cz.
Host names with two IP numbers:
ns2.web4u.cz points to: 2a02:a40:100:28ff::12 and 85.207.53.12
ns.web4u.cz points to: 2001:1568:fd::241 and 185.14.224.241
Mail Servers
reef4u.com is handled by three mail servers: wes1-mx-backup.wedos.net, wes1-mx1.wedos.net and wes1-mx2.wedos.net.
reef4u.com shares some mail servers with other domains, at least partially, such as grastix.com, portugalsko.info, tkmetal.eu, osiris.cz and mff.cz.
Host names with one IP number:
Host wes1-mx-backup.wedos.net points to 46.28.106.56.
Host wes1-mx1.wedos.net points to 46.28.106.11.
Host wes1-mx2.wedos.net points to 46.28.106.12.