sefru.com - dns.ninja
sefru.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 135.181.180.71🇫🇮 Hetzner135.181.0.0/16 HETZNER-DC | ||||||
| PTR | mail.sefru.de | ||||||
| NS | ns1.first-ns.de ⭐ | ||||||
| A | 2a01:4f8:0:a101::a:1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| PTR | ns1.first-ns.de | ||||||
| A | 213.239.242.238🇩🇪 Hetzner213.239.192.0/18 HETZNER-RZ-NBG-BLK2 | ||||||
| PTR | ns1.first-ns.de | ||||||
| NS | robotns2.second-ns.de | ||||||
| A | 2a01:4f8:0:1::5ddc:2🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| PTR | robotns2.second-ns.de | ||||||
| A | 213.133.100.103🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1 | ||||||
| PTR | robotns2.second-ns.de | ||||||
| NS | robotns3.second-ns.com | ||||||
| A | 2001:67c:192c::add:a3🇩🇪 NORIS-NETWORK2001:67c:192c::/48 | ||||||
| PTR | robotns3.second-ns.com | ||||||
| A | 193.47.99.3🇩🇪 NORIS-NETWORK193.47.99.0/24 | ||||||
| PTR | robotns3.second-ns.com | ||||||
| MX | mail.sefru.de ⭐ | ||||||
| A | 2a01:4f9:3a:224c::112:112🇩🇪 Hetzner2a01:4f9::/32 HETZNER-IPv6-BLK | ||||||
| PTR | mail.sefru.de | ||||||
| A | 135.181.180.71🇫🇮 Hetzner135.181.0.0/16 HETZNER-DC | ||||||
| PTR | mail.sefru.de | ||||||
| TXT | google-site-verification=mt40ExC6FbKXylxryafnpoMALmXZv8jXaCn85JPzAGs | ||||||
| TXT | v=spf1 mx ip4:135.181.180.71 ip6:2a01:4f9:3a:224c::112:112 -all | ||||||
| SOA | ns1.first-ns.dednsadmin@sefru.com 2025-11-15 #12 | ||||||
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=1782874231 | ||||||
Previously MX for
sefru.com |
Subdomains
mail.sefru.com |
Same first word
Similar names
DNS History
14 records (5 active, 9 former)
○NSns1.dsredirection.com2016-03-06 → 2016-07-23 · 4 obs
● 2016-07-23 00:31:04
○ 2017-06-14 21:42:58
○ 2026-07-01 03:17:56
●NSns1.first-ns.de2026-02-21 → 2026-07-01 · 3 obs
● 2026-02-21 23:06:46
● 2026-07-01 03:17:56
○NSns1.sefru.com2017-06-14 → 2017-06-14 · 4 obs
● 2017-06-14 21:42:58
○ 2026-02-21 23:06:46
○ 2026-07-01 03:17:56
○NSns2.dsredirection.com2016-03-06 → 2016-07-23 · 4 obs
● 2016-07-23 00:31:04
○ 2017-06-14 21:42:58
○ 2026-07-01 03:17:56
○NSns2.sefru.com2017-06-14 → 2017-06-14 · 4 obs
● 2017-06-14 21:42:58
○ 2026-02-21 23:06:46
○ 2026-07-01 03:17:56
●NSrobotns2.second-ns.de2026-02-21 → 2026-07-01 · 3 obs
● 2026-02-21 23:06:46
● 2026-07-01 03:17:56
●NSrobotns3.second-ns.com2026-02-21 → 2026-07-01 · 3 obs
● 2026-02-21 23:06:46
● 2026-07-01 03:17:56
●MXmail.sefru.de2026-02-21 → 2026-07-01 · 3 obs
● 2026-02-21 23:06:46
● 2026-07-01 03:17:56
○MXsefru.com2017-06-14 → 2017-06-14 · 3 obs
○ 2026-02-21 23:06:46
○ 2026-07-01 03:17:56
●A135.181.180.712026-02-21 → 2026-07-01 · 3 obs
● 2026-02-21 23:06:46
● 2026-07-01 03:17:56
○A141.8.230.202016-03-06 → 2016-07-23 · 4 obs
● 2016-07-23 00:31:04
○ 2017-06-14 21:42:58
○ 2026-07-01 03:17:56
○A176.9.154.812017-06-14 → 2017-06-14 · 4 obs
● 2017-06-14 21:42:58
○ 2026-02-21 23:06:46
○ 2026-07-01 03:17:56
○CNAMEpres.serverhome.com2016-03-06 → 2016-07-23 · 4 obs
● 2016-07-23 00:31:04
○ 2017-06-14 21:42:58
○ 2026-07-01 03:17:56
○CNAMEthie5ku9.dsgeneration.com2016-03-06 → 2016-07-23 · 4 obs
● 2016-07-23 00:31:04
○ 2017-06-14 21:42:58
○ 2026-07-01 03:17:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | c.gtld-servers.net, m.gtld-servers.net, b.gtld-servers.net, g.gtld-servers.net... | - |
| sefru.com | ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com | 2 records |
✅ Authoritative Response
Server:213.239.242.238
NS records: ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sefru.com (unsigned zone)
⏱️ Timing
Total: 765ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 135.181.180.71 |
| NS | 3 | robotns2.second-ns.de, robotns3.second-ns.com... |
| MX | 1 | mail.sefru.de (pri: 10) |
| TXT | 2 | v=spf1 mx ip4:135.181.180.71 ip6:2a01:4f, google-site-verification=mt40ExC6FbKXylx |
| SOA | 1 | ns1.first-ns.de dnsadmin.sefru.com |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (robotns3.second-ns.com, robotns3.second-ns.com)
Analysis
Hierarchy
mail.sefru.com is a subdomain of sefru.com.
IP Addresses
sefru.com has exactly one IP address — 135.181.180.71.
www.bxx5.de, linschmann.com, merkens.info plus two other host names have IP numbers in common with sefru.com.
Name Servers
DNS for sefru.com is handled by three authoritative name servers: robotns3.second-ns.com, ns1.first-ns.de and robotns2.second-ns.de.
The name servers of sefru.com overlap at least partially with those of other domains — among them exchange.se, mlex.at, loftmakler.com and two more.
These name servers commonly appear in combination with the name servers hydrogen.ns.hetzner.com.
Three hostnames — robotns3.second-ns.com, ns1.first-ns.de and robotns2.second-ns.de — each have two IP addresses: robotns3.second-ns.com has 193.47.99.3 and 2001:67c:192c::add:a3, ns1.first-ns.de has 213.239.242.238 and 2a01:4f8:0:a101::a:1, and robotns2.second-ns.de has 213.133.100.103 and 2a01:4f8:0:1::5ddc:2.
Mail Servers
sefru.com uses one mail server — mail.sefru.de.
The mail server setup of sefru.com matches that of other domains such as mail.sefru.de, 2342.de, linschmann.com and two others.
mail.sefru.de resolves to two IP numbers — 135.181.180.71 and 2a01:4f9:3a:224c::112:112.