gref-ip.de - dns.ninja
gref-ip.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=1784455284 | ||||||
PTR for
Subdomains
Same first word
gref-ip.de |
Similar names
DNS History
11 records (6 active, 5 former)
●NSns1.core-networks.de2026-02-20 → 2026-07-19 · 3 obs
● 2026-02-20 04:53:10
● 2026-07-19 10:15:18
○NSns1.domaindiscount24.net2015-06-21 → 2018-05-23 · 4 obs
● 2018-05-23 20:01:16
○ 2026-02-20 04:53:10
○ 2026-07-19 10:15:18
●NSns2.core-networks.eu2026-02-20 → 2026-07-19 · 3 obs
● 2026-02-20 04:53:10
● 2026-07-19 10:15:18
○NSns2.domaindiscount24.net2015-06-21 → 2018-05-23 · 4 obs
● 2018-05-23 20:01:16
○ 2026-02-20 04:53:10
○ 2026-07-19 10:15:18
●NSns3.core-networks.com2026-02-20 → 2026-07-19 · 3 obs
● 2026-02-20 04:53:10
● 2026-07-19 10:15:18
○NSns3.domaindiscount24.net2015-06-21 → 2018-05-23 · 4 obs
● 2018-05-23 20:01:16
○ 2026-02-20 04:53:10
○ 2026-07-19 10:15:18
○MXmail.dgpsonline.eu2015-06-21 → 2017-01-01 · 4 obs
● 2017-01-01 12:06:20
○ 2018-05-23 20:01:16
○ 2026-07-19 10:15:18
●MXmail.gnssonline.eu2018-05-23 → 2026-07-19 · 3 obs
● 2018-05-23 20:01:16
● 2026-07-19 10:15:18
●A116.202.12.12026-02-20 → 2026-07-19 · 3 obs
● 2026-02-20 04:53:10
● 2026-07-19 10:15:18
●A2a01:4f8:c17:8663::32026-02-20 → 2026-07-19 · 3 obs
● 2026-02-20 04:53:10
● 2026-07-19 10:15:18
○A78.46.59.392015-06-21 → 2018-05-23 · 4 obs
● 2018-05-23 20:01:16
○ 2026-02-20 04:53:10
○ 2026-07-19 10:15:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | a.nic.de, f.nic.de, z.nic.de | - |
| gref-ip.de | ns1.core-networks.de, ns3.core-networks.com, ns2.core-networks.eu | 2 records |
✅ Authoritative Response
Server:78.111.72.98
NS records: ns1.core-networks.de, ns3.core-networks.com, ns2.core-networks.eu
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1008ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 116.202.12.1 |
| AAAA | 1 | 2a01:4f8:c17:8663::3 |
| NS | 3 | ns1.core-networks.de, ns3.core-networks.com... |
| MX | 1 | mail.gnssonline.eu (pri: 10) |
| TXT | 1 | v=spf1 a:karim.server.gnssonline.eu ~all |
| SOA | 1 | ns1.core-networks.de hostmaster.core-net |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.core-networks.de, ns1.core-networks.de)
Analysis
Hierarchy
The parent domain of backup.gref-ip.de and service.gref-ip.de is gref-ip.de.
IP Addresses
gref-ip.de has two IP addresses: 116.202.12.1 and 2a01:4f8:c17:8663::3
service.gref-ip.de, for instance, is one of the other host names sharing IP numbers with gref-ip.de.
Name Servers
The authoritative name servers for gref-ip.de are ns3.core-networks.com, ns1.core-networks.de and ns2.core-networks.eu — three in total.
There is at least partial name server overlap between gref-ip.de and other domains — basicmail.org, familie-rauscher.eu, model-based-testing.eu and two more among them.
ns3.core-networks.com, ns1.core-networks.de and ns2.core-networks.eu all resolve to exactly two IP numbers apiece: ns3.core-networks.com → 82.96.73.254 and 2001:1bc0:d::ffff; ns1.core-networks.de → 194.213.5.254 and 2001:1bc0:d::fffe; ns2.core-networks.eu → 78.111.72.98 and 2a02:f98:0:22::ffff.
Mail Servers
gref-ip.de routes its mail through a single mail server, mail.gnssonline.eu.
gref-ip.de has the same mail server arrangement as a number of other domains, for example euref-ip.net, gnssonline.de, backup.gref-ip.de and two more.
mail.gnssonline.eu carries two IP numbers: 78.47.227.184 and 2a01:4f8:c17:2914::20.