fon4u.de - robtex.com
fon4u.de
de
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | f.nic.de ⭐ | ||||||
| NS | a.nic.de | ||||||
| NS | l.de.net ⚠️ Not in parent delegation | ||||||
| NS | n.de.net ⚠️ Not in parent delegation | ||||||
| NS | s.de.net ⚠️ Not in parent delegation | ||||||
| NS | z.nic.de | ||||||
| SOA | f.nic.dedns-operations@denic.de serial=1778364694 | ||||||
Subdomains
www.fon4u.de |
Same first word
fon4u.de |
Similar names
DNS History
7 records (5 active, 2 former)
●MXfon4u-de.mail.protection.outlook.com2017-01-01 → 2026-05-09 · 3 obs
● 2017-01-01 20:23:16
● 2026-05-09 22:13:20
○MXsmtp.3u.net2015-08-10 → 2016-07-25 · 4 obs
● 2016-07-25 22:31:32
○ 2017-01-01 20:23:16
○ 2026-05-09 22:13:20
●A2a01:4f8:d0a:43b8::22026-03-27 → 2026-05-09 · 3 obs
● 2026-03-27 14:22:24
● 2026-05-09 22:13:20
●A78.47.62.472026-03-27 → 2026-05-09 · 3 obs
● 2026-03-27 14:22:24
● 2026-05-09 22:13:20
○A81.209.151.192015-08-10 → 2018-12-22 · 4 obs
● 2018-12-22 09:39:38
○ 2026-03-27 14:22:24
○ 2026-05-09 22:13:20
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | f.nic.de, z.nic.de, a.nic.de | - |
| fon4u.de | ns1.3u.net, ns2.3u.net | - |
✅ Authoritative Response
Server:81.209.151.254
NS records: ns1.3u.net, ns2.3u.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for fon4u.de (unsigned zone)
⏱️ Timing
Total: 953ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 78.47.62.47 |
| AAAA | 1 | 2a01:4f8:d0a:43b8::2 |
| NS | 2 | ns1.3u.net, ns2.3u.net |
| MX | 1 | fon4u-de.mail.protection.outlook.com (pr |
| TXT | 2 | MS=ms15710274, v=spf1 a:smtp.3u.net include:spf.protect |
| SOA | 1 | ns1.3u.net ops.3u.net |
Analysis
Hierarchy
www.fon4u.de is a child of fon4u.de.
IP Addresses
fon4u.de has two IP numbers: 2a01:4f8:d0a:43b8::2 and 78.47.62.47.
Other host names, for instance 3u-energy-pe.de, 3uenergy.net, 3uenergy-pe.de, www.3u.net and dedi6828.your-server.de share IP numbers with fon4u.de.
Name Servers
fon4u.de's delegation uses two name servers: ns1.3u.net and ns2.3u.net.
fon4u.de uses the same name server setup as other domains, such as 3u.net, selfio.ch, 85.82.185.in-addr.arpa, 84.82.185.in-addr.arpa and selfio.de.
Host names with two IPs:
ns1.3u.net points to 2a05:8e40:0:2::3:42 and 81.209.151.254
ns2.3u.net points to 2a05:8e40:0:2::3:52 and 83.125.107.34
Mail Servers
A single mail server handles fon4u.de, fon4u-de.mail.protection.outlook.com.
Host fon4u-de.mail.protection.outlook.com points to eight IPs: 2a01:111:f403:ca04::, 2a01:111:f403:ca04::f, 2a01:111:f403:ca09::, 2a01:111:f403:ca09::1, 52.101.68.8, 52.101.68.27, 52.101.68.29 and 52.101.73.26.