mail.rt21.com - robtex.com

mail.rt21.com

DNSSEC⚠️ Not signed
A91.195.241.232🇩🇪 SEDO91.195.240.0/23 -NET-PI
NSsl1.sedo.com ⭐ ⚠️ Not in parent delegation
A91.195.240.173🇩🇪 SEDO91.195.240.0/23 -NET-PI
NSsl2.sedo.com ⚠️ Not in parent delegation
A91.195.241.173🇩🇪 SEDO91.195.240.0/23 -NET-PI
MXlocalhost ⭐
TXTv=spf1 -all
SOAsl1.sedo.comhostmaster@sedo.de 2018-05-16 #1

rt21.com

DNSSEC⚠️ Not signed
A91.195.241.232🇩🇪 SEDO91.195.240.0/23 -NET-PI
NSsl1.sedo.com ⭐
NSsl2.sedo.com
MXlocalhost ⭐
TXTv=spf1 -all
SOAsl1.sedo.comhostmaster@sedo.de 2018-05-16 #1

Same first word

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DNS History

14 records (4 active, 10 former)

20162017201820192020202120222023202420252026NSsl1.sedo.comsl2.sedo.comns1.sedoparking.comns1.uniregistrymarket.linkns2.sedoparking.comns2.uniregistrymarket.linkMXlocalhostio.bouncemx.commail.nickstel.comA91.195.241.23269.172.201.15370.39.84.23572.52.4.119CNAMEr.dcoin.co
○NSns1.sedoparking.com2015-06-04 → 2015-06-04 · 3 obs
● 2015-06-04 18:15:08
○ 2015-10-22 19:12:34
○ 2026-03-28 09:47:58
○NSns1.uniregistrymarket.link2016-09-21 → 2016-09-21 · 4 obs
○ 2015-10-22 19:12:34
● 2016-09-21 15:12:04
○ 2026-03-26 22:24:30
○ 2026-03-28 09:47:58
○NSns2.sedoparking.com2015-06-04 → 2015-06-04 · 3 obs
● 2015-06-04 18:15:08
○ 2015-10-22 19:12:34
○ 2026-03-28 09:47:58
○NSns2.uniregistrymarket.link2016-09-21 → 2016-09-21 · 4 obs
○ 2015-10-22 19:12:34
● 2016-09-21 15:12:04
○ 2026-03-26 22:24:30
○ 2026-03-28 09:47:58
●NSsl1.sedo.com2026-03-26 → 2026-03-28 · 3 obs
○ 2016-09-21 15:12:04
● 2026-03-26 22:24:30
● 2026-03-28 09:47:58
●NSsl2.sedo.com2026-03-26 → 2026-03-28 · 3 obs
○ 2016-09-21 15:12:04
● 2026-03-26 22:24:30
● 2026-03-28 09:47:58
○MXio.bouncemx.com2015-10-22 → 2015-10-22 · 4 obs
○ 2015-06-04 18:15:08
● 2015-10-22 19:12:34
○ 2015-12-31 15:20:54
○ 2026-03-28 09:47:58
●MXlocalhost2026-03-26 → 2026-03-28 · 3 obs
○ 2015-12-31 15:20:54
● 2026-03-26 22:24:30
● 2026-03-28 09:47:58
○MXmail.nickstel.com2015-06-04 → 2015-06-04 · 3 obs
● 2015-06-04 18:15:08
○ 2015-10-22 19:12:34
○ 2026-03-28 09:47:58
○A69.172.201.1532016-09-21 → 2016-09-21 · 4 obs
○ 2015-12-31 15:20:54
● 2016-09-21 15:12:04
○ 2026-03-26 22:24:30
○ 2026-03-28 09:47:58
○A70.39.84.2352015-10-22 → 2015-10-22 · 4 obs
○ 2015-06-04 18:15:08
● 2015-10-22 19:12:34
○ 2015-12-31 15:20:54
○ 2026-03-28 09:47:58
○A72.52.4.1192015-06-04 → 2015-06-04 · 3 obs
● 2015-06-04 18:15:08
○ 2015-10-22 19:12:34
○ 2026-03-28 09:47:58
●A91.195.241.2322026-03-26 → 2026-03-28 · 3 obs
○ 2016-09-21 15:12:04
● 2026-03-26 22:24:30
● 2026-03-28 09:47:58
○CNAMEr.dcoin.co2015-10-22 → 2015-10-22 · 3 obs
● 2015-10-22 19:12:34
○ 2015-12-31 15:20:54
○ 2026-03-28 09:47:58

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
rt21.comsl1.sedo.com, sl2.sedo.com2 records

✅ Authoritative Response

Server:91.195.241.173

NS records: sl1.sedo.com, sl2.sedo.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rt21.com (unsigned zone)

⏱️ Timing

Total: 325ms | Queries: -

📄 Records

TypeCountSample Data
A191.195.241.232
NS2sl1.sedo.com, sl2.sedo.com
MX1localhost (pri: 0)
TXT1v=spf1 -all
SOA1sl1.sedo.com hostmaster.sedo.de

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (sl1.sedo.com, sl2.sedo.com)

Analysis

IP Addresses

mail.rt21.com points to IP number: 91.195.241.232.

Other host names such as agrima.eu, so-on.de, kusa.in, korad.de and mx.acteur.amsterdam share IPs with mail.rt21.com.

Name Servers

mail.rt21.com is delegated to two name servers: sl1.sedo.com and sl2.sedo.com.

mail.rt21.com shares the same name server setup as bluemap.eu, blueos.de, mail.etudier.de, skinet.eu and r-m-t.de.

Host names with a single IP:

sl1.sedo.com points to 91.195.240.173.

sl2.sedo.com points to 91.195.241.173.

Mail Servers

mail.rt21.com is handled by a single mail server, localhost.

The mail server setup for mail.rt21.com matches that of other domains, for instance dice.amsterdam, cahd.com, web-beheer.nl, puwas.com and isfilm.com.