checksix.de - robtex.com
checksix.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=1774915296 | ||||||
Subdomains
mail.checksix.de |
Same first word
Similar names
DNS History
12 records (6 active, 6 former)
●NScns1.alfahosting.info2026-02-19 → 2026-03-31 · 3 obs
● 2026-02-19 07:14:58
● 2026-03-31 00:29:54
●NScns2.alfahosting.info2026-02-19 → 2026-03-31 · 3 obs
● 2026-02-19 07:14:58
● 2026-03-31 00:29:54
●NScns3.alfahosting.info2026-02-19 → 2026-03-31 · 3 obs
● 2026-02-19 07:14:58
● 2026-03-31 00:29:54
○NSdocks04.rzone.de2015-08-02 → 2020-03-23 · 4 obs
● 2020-03-23 04:14:22
○ 2026-02-19 07:14:58
○ 2026-03-31 00:29:54
○NSshades08.rzone.de2015-08-02 → 2020-03-23 · 4 obs
● 2020-03-23 04:14:22
○ 2026-02-19 07:14:58
○ 2026-03-31 00:29:54
●MXmx03.secure-mailgate.com2026-02-19 → 2026-03-31 · 3 obs
● 2026-02-19 07:14:58
● 2026-03-31 00:29:54
●MXmx04.secure-mailgate.com2026-02-19 → 2026-03-31 · 3 obs
● 2026-02-19 07:14:58
● 2026-03-31 00:29:54
○MXsmtp.rzone.de2015-08-02 → 2017-03-25 · 4 obs
● 2017-03-25 15:24:58
○ 2020-03-23 04:14:22
○ 2026-03-31 00:29:54
○MXsmtpin.rzone.de2020-03-23 → 2020-03-23 · 4 obs
● 2020-03-23 04:14:22
○ 2026-02-19 07:14:58
○ 2026-03-31 00:29:54
○A2a01:238:20a:202:1095::2015-08-02 → 2020-03-23 · 4 obs
● 2020-03-23 04:14:22
○ 2026-02-19 07:14:58
○ 2026-03-31 00:29:54
○A81.169.145.952015-08-02 → 2020-03-23 · 4 obs
● 2020-03-23 04:14:22
○ 2026-02-19 07:14:58
○ 2026-03-31 00:29:54
●A81.88.34.392026-02-19 → 2026-03-31 · 3 obs
● 2026-02-19 07:14:58
● 2026-03-31 00:29:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | a.nic.de, f.nic.de, z.nic.de | - |
| checksix.de | cns3.alfahosting.info, cns1.alfahosting.info, cns2.alfahosting.info | - |
✅ Authoritative Response
Server:109.237.142.8
NS records: cns3.alfahosting.info, cns1.alfahosting.info, cns2.alfahosting.info
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for checksix.de (unsigned zone)
⏱️ Timing
Total: 1015ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.88.34.39 |
| NS | 3 | cns3.alfahosting.info, cns2.alfahosting.info... |
| MX | 2 | mx04.secure-mailgate.com (pri: 10), mx03.secure-mailgate.com (pri: 10) |
| TXT | 1 | v=spf1 a mx include:secure-mailgate.com |
| SOA | 1 | cns1.alfahosting.info hostmaster@alfahos |
Analysis
Hierarchy
checksix.de is the parent of mail.checksix.de.
IP Addresses
checksix.de points to a single IP number: 81.88.34.39.
other host names for instance bastian-online.de, mail.lichtenrade-gegen-fluglaerm.de, mail.innovations-software.org, mail.reisebuero-columbus.de and cad-design-porada.com share IP numbers with checksix.de.
Name Servers
checksix.de is delegated to three name servers: cns1.alfahosting.info, cns2.alfahosting.info and cns3.alfahosting.info.
checksix.de at least partially shares name servers with other domains, for instance tdo-partyband.de, rechtsanwaelte-in-leipzig.de, intqu.net, agenturwebsite.de and hotelpolo.de.
These name servers are commonly used with the name servers ns8.alfahosting.info.
Host names with two IP numbers:
Host cns1.alfahosting.info points to 2a01:64c0:0:5000::8 and 109.237.142.8.
Host cns2.alfahosting.info points to 2a01:4f8:2b02:a88::105 and 148.251.254.105.
Host cns3.alfahosting.info points to 2a02:2b80:101:5000::8 and 109.237.143.8.
Mail Servers
checksix.de is handled by two mail servers: mx03.secure-mailgate.com and mx04.secure-mailgate.com.
checksix.de shares the same mail server setup as other domains, for instance isaan.info, sunflux.de, renegat.info, carolapetri.com and barbian.info.
checksix.de shares some mail servers with other domains, at least partially, for instance rusvay.de and gbschule.de.
Host names with two IP numbers:
mx03.secure-mailgate.com points to 46.243.88.174 and 46.243.88.176
mx04.secure-mailgate.com points to 46.243.88.175 and 46.243.88.177