21mail.pl - robtex.com

21mail.pl

DNSSEC⚠️ Not signed
A2a01:4f8:1c0c:538a::1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
A195.201.22.96🇩🇪 Hetzner195.201.0.0/16 HETZNER-DC
NS21mail.pl ⭐
A2a01:4f8:1c0c:538a::1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
A195.201.22.96🇩🇪 Hetzner195.201.0.0/16 HETZNER-DC
PTR21mail.pl
NSfns1.42.pl
A79.98.145.34🇵🇱 NitroNet79.98.144.0/21 Nitronet Sp. z o.o.
NSfns2.42.pl
A2001:41d0:701:1100::66c🇩🇪 OVH2001:41d0::/32 IPv6
PTRfns2.42.pl
A51.38.99.90🇫🇷 OVH51.38.0.0/16
PTRfns2.42.pl
NSns1.first-ns.de ⚠️ Not in parent delegation
A2a01:4f8:0:a101::a:1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
PTRns1.first-ns.de
A213.239.242.238🇩🇪 Hetzner213.239.192.0/18 HETZNER-RZ-NBG-BLK2
PTRns1.first-ns.de
NSrobotns2.second-ns.de ⚠️ Not in parent delegation
A2a01:4f8:0:1::5ddc:2🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
PTRrobotns2.second-ns.de
A213.133.100.103🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1
PTRrobotns2.second-ns.de
NSrobotns3.second-ns.com ⚠️ Not in parent delegation
A2001:67c:192c::add:a3🇩🇪 NORIS-NETWORK2001:67c:192c::/48
PTRrobotns3.second-ns.com
A193.47.99.3🇩🇪 NORIS-NETWORK193.47.99.0/24
PTRrobotns3.second-ns.com
MXmail.21mail.pl ⭐
A2a01:4f8:1c0c:538a::1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
A195.201.22.96🇩🇪 Hetzner195.201.0.0/16 HETZNER-DC
PTR21mail.pl
TXTv=spf1 a mx a:21mail.pl mx:21mail.pl ip4:195.201.22.96 ip4:195.201.22.96 ip6:...
SOA21mail.plroot@21mail.pl 2021-03-16 #74

pl

DNSSEC🔒 Signed (DS record present)
NSa-dns.pl ⭐
NSb-dns.pl
NSd-dns.pl
NSf-dns.pl
NSh-dns.pl
NSj-dns.pl
TXTccTLD of Poland
SOAa-dns.pldnsmaster@nask.pl serial=1774683057

NS for

21mail.pl

Previously MX for

21mail.pl

Same first word

21mail.com
21mail.de
21mail.pl
21mail.com.cn
21mail.ru
21mail.net
21mail.jp

Similar names

mail12.chicappa.jp
mail12.ru
12mail.ru
mail21.eu
mail12.kinghost.net
lima12.com
mail12.net
mail12.de
1mail2.com
12mail.at
mail21.info
12mail.com
amil21.com
12mail.dk
mail12.nl
12mail.fr
mail21.nl
mail21.com
mail21.ch
mail21.chicappa.jp
mail12.com
12mail.net
12mail.nl
mail21.net
mail21.org
mail21.de
12mail.org
mail21.cc
12mail.biz
1mail2.dk
1mail2.de
lima21.com

DNS History

13 records (9 active, 4 former)

20162017201820192020202120222023202420252026NS21mail.plfns1.42.plfns2.42.plns1.first-ns.derobotns2.second-ns.derobotns3.second-ns.comns1.uxnet.plns2.uxnet.plMXmail.21mail.pl21mail.plA195.201.22.962a01:4f8:1c0c:538a::1185.5.97.183
●NS21mail.pl2026-03-27 → 2026-03-28 · 3 obs
○ 2016-12-21 08:02:04
● 2026-03-27 11:44:34
● 2026-03-28 10:15:12
●NSfns1.42.pl2026-03-27 → 2026-03-28 · 3 obs
○ 2016-12-21 08:02:04
● 2026-03-27 11:44:34
● 2026-03-28 10:15:12
●NSfns2.42.pl2026-03-27 → 2026-03-28 · 3 obs
○ 2016-12-21 08:02:04
● 2026-03-27 11:44:34
● 2026-03-28 10:15:12
●NSns1.first-ns.de2026-03-27 → 2026-03-28 · 3 obs
○ 2016-12-21 08:02:04
● 2026-03-27 11:44:34
● 2026-03-28 10:15:12
○NSns1.uxnet.pl2015-05-11 → 2016-12-21 · 4 obs
● 2015-05-11 02:47:12
● 2016-12-21 08:02:04
○ 2026-03-27 11:44:34
○ 2026-03-28 10:15:12
○NSns2.uxnet.pl2015-05-11 → 2016-12-21 · 4 obs
● 2015-05-11 02:47:12
● 2016-12-21 08:02:04
○ 2026-03-27 11:44:34
○ 2026-03-28 10:15:12
●NSrobotns2.second-ns.de2026-03-27 → 2026-03-28 · 3 obs
○ 2016-12-21 08:02:04
● 2026-03-27 11:44:34
● 2026-03-28 10:15:12
●NSrobotns3.second-ns.com2026-03-27 → 2026-03-28 · 3 obs
○ 2016-12-21 08:02:04
● 2026-03-27 11:44:34
● 2026-03-28 10:15:12
○MX21mail.pl2015-05-11 → 2016-12-21 · 4 obs
● 2015-05-11 02:47:12
● 2016-12-21 08:02:04
○ 2026-03-27 11:44:34
○ 2026-03-28 10:15:12
●MXmail.21mail.pl2026-03-27 → 2026-03-28 · 3 obs
○ 2016-12-21 08:02:04
● 2026-03-27 11:44:34
● 2026-03-28 10:15:12
○A185.5.97.1832015-05-11 → 2016-12-21 · 4 obs
● 2015-05-11 02:47:12
● 2016-12-21 08:02:04
○ 2026-03-27 11:44:34
○ 2026-03-28 10:15:12
●A195.201.22.962026-03-27 → 2026-03-28 · 3 obs
○ 2016-12-21 08:02:04
● 2026-03-27 11:44:34
● 2026-03-28 10:15:12
●A2a01:4f8:1c0c:538a::12026-03-27 → 2026-03-28 · 3 obs
○ 2016-12-21 08:02:04
● 2026-03-27 11:44:34
● 2026-03-28 10:15:12

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
pla-dns.pl, d-dns.pl, b-dns.pl, f-dns.pl...-
21mail.plfns2.42.pl, fns1.42.pl3 records

✅ Authoritative Response

Server:51.38.99.90

NS records: fns2.42.pl, fns1.42.pl

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21mail.pl (unsigned zone)

⏱️ Timing

Total: 803ms | Queries: -

📄 Records

TypeCountSample Data
A1195.201.22.96
AAAA12a01:4f8:1c0c:538a::1
NS5fns2.42.pl, ns1.first-ns.de...
MX1mail.21mail.pl (pri: 5)
TXT1v=spf1 a mx a:21mail.pl mx:21mail.pl ip4
SOA121mail.pl root.21mail.pl

📌 Glue Records Collected

Total: 3

Out-of-bailiwick: 3 (fns2.42.pl, fns1.42.pl, fns2.42.pl)

Analysis

Name Server Role

21mail.pl serves as the name server for 21mail.pl.

Common name servers include robotns3.second-ns.com, ns1.first-ns.de and robotns2.second-ns.de, used together with 21mail.pl.

IP Addresses

21mail.pl resolves to two IP numbers: 2a01:4f8:1c0c:538a::1 and 195.201.22.96.

Name Servers

21mail.pl is delegated to six name servers: 21mail.pl, robotns3.second-ns.com, ns1.first-ns.de, robotns2.second-ns.de, fns1.42.pl and fns2.42.pl.

21mail.pl shares some name servers with other domains, for example xn--lwenstadt-07a.de, codei.com, sfvalles.es, rsc-steuerberatung.de and cafos.de.

These name servers are often used together with oxygen.ns.hetzner.com, hydrogen.ns.hetzner.com and helium.ns.hetzner.de.

Two IPs per host:

21mail.pl points to 2a01:4f8:1c0c:538a::1 and 195.201.22.96

robotns3.second-ns.com points to 2001:67c:192c::add:a3 and 193.47.99.3

ns1.first-ns.de points to 2a01:4f8:0:a101::a:1 and 213.239.242.238

robotns2.second-ns.de points to 2a01:4f8:0:1::5ddc:2 and 213.133.100.103

fns2.42.pl points to 2001:41d0:701:1100::66c and 51.38.99.90

One IP:

fns1.42.pl points to 79.98.145.34

Mail Servers

21mail.pl is handled by a single mail server, mail.21mail.pl.

mail.21mail.pl resolves to two IPs: 2a01:4f8:1c0c:538a::1 and 195.201.22.96.