tfrei.de - robtex.com
tfrei.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=1783759558 | ||||||
Same first word
Similar names
DNS History
7 records (7 active, 0 former)
●NSns.portunity.de2026-06-01 → 2026-07-11 · 2 obs
● 2026-07-11 08:53:04
●NSns2.portunity.de2026-06-01 → 2026-07-11 · 2 obs
● 2026-07-11 08:53:04
●MXsmtp-backup1.portunity.de2026-06-01 → 2026-07-11 · 2 obs
● 2026-07-11 08:53:04
●MXsmtp-backup2.portunity.de2026-06-01 → 2026-07-11 · 2 obs
● 2026-07-11 08:53:04
●MXsmtp-in.portunity.de2026-06-01 → 2026-07-11 · 2 obs
● 2026-07-11 08:53:04
●A217.144.129.1712026-06-01 → 2026-07-11 · 2 obs
● 2026-07-11 08:53:04
●A2a02:a00::2:0:4:ebe22026-06-01 → 2026-07-11 · 2 obs
● 2026-07-11 08:53:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | f.nic.de, z.nic.de, a.nic.de | - |
| tfrei.de | ns.portunity.de, ns2.portunity.de | 4 records |
✅ Authoritative Response
Server:217.144.128.33
NS records: ns.portunity.de, ns2.portunity.de
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for tfrei.de (unsigned zone)
⏱️ Timing
Total: 740ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 217.144.129.171 |
| AAAA | 1 | 2a02:a00::2:0:4:ebe2 |
| NS | 2 | ns.portunity.de, ns2.portunity.de |
| MX | 3 | smtp-in.portunity.de (pri: 10), smtp-backup1.portunity.de (pri: 20)... |
| TXT | 2 | see also: units.tfrei.de TXT, v=spf1 include:set1.spf-cust.portunity.d |
| SOA | 1 | ns.portunity.de hostmaster.portunity.de |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns2.portunity.de, ns.portunity.de, ns2.portunity.de...)
Analysis
IP Addresses
tfrei.de resolves to the IP addresses 217.144.129.171 and 2a02:a00::2:0:4:ebe2
surfen.eu, telefonkette.eu, securitydoor.de and two other host names share IP numbers with tfrei.de.
Name Servers
Two name servers handle the delegation for tfrei.de: ns2.portunity.de and ns.portunity.de.
tfrei.de uses the same name servers as several other domains — among them sip-port.net, ispsuite.org, lambeck.de and two more.
tfrei.de shares at least some of its name servers with other domains, including reetz.it, flugkarten.eu, fahrgemeinschaft.eu and two others.
These name servers are frequently paired with the name servers ns2.reetz-it.de and ns.reetz-it.de.
ns2.portunity.de and ns.portunity.de both carry two IP addresses. The A records for ns2.portunity.de are 188.246.0.33 and 2a02:a00:f::a2; the A records for ns.portunity.de are 217.144.128.33 and 2a02:a00::a1.
Mail Servers
tfrei.de is handled by three mail servers: smtp-backup1.portunity.de, smtp-backup2.portunity.de and smtp-in.portunity.de.
tfrei.de has at least partial mail server overlap with other domains such as motorradonline.eu, xn--rden-0ra.de, portunity.tv and two more.
smtp-backup1.portunity.de, smtp-backup2.portunity.de and smtp-in.portunity.de are three hostnames that each resolve to a pair of IP addresses: smtp-backup1.portunity.de to 217.144.128.54 and 2a02:a00::2:0:0:54, smtp-backup2.portunity.de to 37.120.186.72 and 2a03:4000:f:5b9::25, and smtp-in.portunity.de to 217.144.128.52 and 2a02:a00::2:0:0:52.