duo-service.de - robtex.com
duo-service.de
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2a01:238:20a:202:1093::🇩🇪 STRATO2a01:238:20a::/48 Strato AG | ||||||
| PTR | w8d.rzone.de | ||||||
| A | 81.169.145.93🇩🇪 STRATO81.169.144.0/22 AG | ||||||
| NS | shades13.rzone.de ⭐ | ||||||
| A | 2607:f1c0:fe:53:185:132:34:140🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US | ||||||
| PTR | shades13.rzone.de | ||||||
| A | 185.132.34.140🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS) | ||||||
| PTR | shades13.rzone.de | ||||||
| NS | docks15.rzone.de | ||||||
| A | 2001:8d8:fe:53:5747:2a74:d:15🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific | ||||||
| PTR | docks15.rzone.de | ||||||
| A | 217.160.80.142🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific | ||||||
| PTR | docks15.rzone.de | ||||||
| MX | mx-01-eu-central-1.prod.hydra.sophos.com ⭐ | ||||||
| A | 3.121.91.143🇩🇪 Amazon3.120.0.0/14 EC2 FRA prefix | ||||||
| A | 18.197.165.168🇩🇪 Amazon18.196.0.0/15 EC2 FRA prefix | ||||||
| MX | mx-02-eu-central-1.prod.hydra.sophos.com ⭐ | ||||||
| A | 3.121.91.143🇩🇪 Amazon3.120.0.0/14 EC2 FRA prefix | ||||||
| A | 18.197.165.168🇩🇪 Amazon18.196.0.0/15 EC2 FRA prefix | ||||||
| TXT | v=spf1 include:spf.sendinblue.com include:_spf_eucentral1.prod.hydra.sophos.c... | ||||||
| TXT | Sendinblue-code:4ec018fddc20103740a9f3e25fe22217 | ||||||
| TXT | MS=33A8F2FE978AE6416C5004715434E5FD4BE47BA7 | ||||||
| TXT | sophos-domain-verification=3ea5b1aae679d1bbcd528161a25096ee022f0d50 | ||||||
| SOA | shades13.rzone.dehostmaster@strato-rz.de 2026-03-27 #67 | ||||||
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=1784477768 | ||||||
Subdomains
Same first word
duo-service.ru |
duo-service.de |
Similar names
DNS History
16 records (6 active, 10 former)
●NSdocks15.rzone.de2026-03-29 → 2026-07-19 · 3 obs
● 2026-03-29 17:33:56
● 2026-07-19 16:28:04
○NSns5.kasserver.com2020-02-01 → 2020-02-01 · 3 obs
○ 2026-03-29 17:33:56
○ 2026-07-19 16:28:04
○NSns6.kasserver.com2020-02-01 → 2020-02-01 · 3 obs
○ 2026-03-29 17:33:56
○ 2026-07-19 16:28:04
●NSshades13.rzone.de2026-03-29 → 2026-07-19 · 3 obs
● 2026-03-29 17:33:56
● 2026-07-19 16:28:04
○MXmail.duo-service.de2020-02-01 → 2026-04-30 · 4 obs
● 2026-04-30 03:07:22
○ 2026-06-30 21:46:28
○ 2026-07-19 16:28:04
●MXmx-01-eu-central-1.prod.hydra.sophos.com2026-06-30 → 2026-07-19 · 3 obs
● 2026-06-30 21:46:28
● 2026-07-19 16:28:04
●MXmx-02-eu-central-1.prod.hydra.sophos.com2026-06-30 → 2026-07-19 · 3 obs
● 2026-06-30 21:46:28
● 2026-07-19 16:28:04
○A116.203.13.102026-03-29 → 2026-07-19 · 2 obs
○ 2026-07-19 16:28:04
●A2a01:238:20a:202:1093::2026-03-29 → 2026-07-19 · 3 obs
● 2026-03-29 17:33:56
● 2026-07-19 16:28:04
○A2a01:4f8:1c1c:90f2::12026-03-29 → 2026-07-19 · 2 obs
○ 2026-07-19 16:28:04
●A81.169.145.932026-03-29 → 2026-07-19 · 3 obs
● 2026-03-29 17:33:56
● 2026-07-19 16:28:04
○A85.13.162.1812020-02-01 → 2020-02-01 · 3 obs
○ 2026-03-29 17:33:56
○ 2026-07-19 16:28:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | a.nic.de, z.nic.de, f.nic.de | - |
| duo-service.de | shades13.rzone.de, docks15.rzone.de | - |
✅ Authoritative Response
Server:217.160.80.142
NS records: shades13.rzone.de, docks15.rzone.de
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for duo-service.de (unsigned zone)
⏱️ Timing
Total: 1316ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.169.145.93 |
| AAAA | 1 | 2a01:238:20a:202:1093:: |
| NS | 2 | shades13.rzone.de, docks15.rzone.de |
| MX | 2 | mx-01-eu-central-1.prod.hydra.sophos.com, mx-02-eu-central-1.prod.hydra.sophos.com |
| TXT | 4 | v=spf1 include:spf.sendinblue.com includ, sophos-domain-verification=3ea5b1aae679d... |
| SOA | 1 | shades13.rzone.de hostmaster.strato-rz.d |
Analysis
Hierarchy
duo-service.de is the parent domain of imap.duo-service.de and mail.duo-service.de.
IP Addresses
duo-service.de resolves to the IP addresses 81.169.145.93 and 2a01:238:20a:202:1093::
Additional host names — kunden-agentur.de, tomax.de, nirfx.com and two others — share IP numbers with duo-service.de.
Name Servers
duo-service.de is delegated to two name servers: docks15.rzone.de and shades13.rzone.de.
duo-service.de shares its name server setup with other domains, including fertiggarage.tips, snow-camp.de, antik-haus.de and two others.
duo-service.de partially shares its NS delegation with several other domains, including ligamentum.de, saga-online.de, powerbed.net and two others.
In DNS configurations, these name servers often share authority with shades02.rzone.de, docks20.rzone.de, shades14.rzone.de and 7 other name servers.
docks15.rzone.de and shades13.rzone.de each resolve to two IP addresses: docks15.rzone.de points to 217.160.80.142 and 2001:8d8:fe:53:5747:2a74:d:15, while shades13.rzone.de points to 185.132.34.140 and 2607:f1c0:fe:53:185:132:34:140.
Mail Servers
duo-service.de has two mail servers: mx-01-eu-central-1.prod.hydra.sophos.com and mx-02-eu-central-1.prod.hydra.sophos.com.
duo-service.de shares the same mail server setup as other domains, including veramont.de, betonwerk-melsdorf.de, verdie.fr and two others.
duo-service.de shares mail servers — at least in part — with other domains, including krankenhausgesellschaft-bamberg.de, negpm.ma, cnc-ag.de and two others.
mx-01-eu-central-1.prod.hydra.sophos.com and mx-02-eu-central-1.prod.hydra.sophos.com each resolve to two IP addresses: 3.121.91.143 and 18.197.165.168.
mx-01-eu-central-1.prod.hydra.sophos.com and mx-02-eu-central-1.prod.hydra.sophos.com are host names that each point to 3.121.91.143 IP addresses.
mx-01-eu-central-1.prod.hydra.sophos.com and mx-02-eu-central-1.prod.hydra.sophos.com are host names that each point to 18.197.165.168 IP addresses.