linux.edu - robtex.com

linux.edu

DNSSEC⚠️ Not signed
A2001:41d0:a:62c4::1🇫🇷 OVH2001:41d0::/32 IPv6
PTRcrux.linux.edu
A37.187.109.196🇫🇷 OVH37.187.0.0/16
NSmaster.linux.edu ⭐
A2001:41d0:a:62c4::1🇫🇷 OVH2001:41d0::/32 IPv6
PTRcrux.linux.edu
A37.187.109.196🇫🇷 OVH37.187.0.0/16
PTRcrux.linux.edu
NScharybdis.linux.edu
A35.211.12.166🇺🇸 Google35.211.0.0/16
PTR166.12.211.35.bc.googleusercontent.com
NScrux.linux.edu ⚠️ Not in parent delegation
A2001:41d0:a:62c4::1🇫🇷 OVH2001:41d0::/32 IPv6
PTRcrux.linux.edu
A37.187.109.196🇫🇷 OVH37.187.0.0/16
PTRcrux.linux.edu
A172.205.254.133🇳🇱 Microsoft172.200.0.0/13
MXaspmx.l.google.com ⭐
A2607:f8b0:4023:c03::1b🇺🇸 Google2607:f8b0::/32
PTRdy-in-f27.1e100.net
A74.125.137.27🇺🇸 Google74.125.137.0/24
PTRdy-in-f27.1e100.net
MXalt1.aspmx.l.google.com(20)
A2607:f8b0:4023:2801::1b🇺🇸 Google2607:f8b0::/32
PTRlcausi-in-f27.1e100.net
A192.178.128.27🇺🇸 Google192.178.128.0/24
PTRlcausi-in-f27.1e100.net
MXalt2.aspmx.l.google.com(20)
A2607:f8b0:4023:3003::1b🇺🇸 Google2607:f8b0::/32
PTRyulnkjt-in-f27.1e100.net
A172.253.145.26🇺🇸 Google172.253.145.0/24
PTRyulnkjt-in-f26.1e100.net
MXaspmx2.googlemail.com(30)
A2607:f8b0:4023:2801::1a🇺🇸 Google2607:f8b0::/32
PTRlcausi-in-f26.1e100.net
A192.178.128.27🇺🇸 Google192.178.128.0/24
PTRlcausi-in-f27.1e100.net
MXaspmx3.googlemail.com(30)
A2607:f8b0:4023:3003::1a🇺🇸 Google2607:f8b0::/32
PTRyulnkjt-in-f26.1e100.net
A172.253.145.27🇺🇸 Google172.253.145.0/24
PTRyulnkjt-in-f27.1e100.net
MXaspmx4.googlemail.com(30)
A2a00:1450:4009:c0f::1a🇬🇧 Google2a00:1450:4009::/48
PTRyulhrs-in-f26.1e100.net
A192.178.223.27🇺🇸 Google192.178.223.0/24
PTRyulhrs-in-f27.1e100.net
MXaspmx5.googlemail.com(30)
A2a00:1450:400c:c00::1b🇧🇪 Google2a00:1450:400c::/48
PTRws-in-f27.1e100.net
PTRws-in-x1b.1e100.net
A173.194.76.27🇺🇸 Google173.194.76.0/24
PTRws-in-f27.1e100.net
TXTv=DMARC1; p=reject; rua=mailto:postmaster@linux.edu, mailto:dmarc@linux.edu; ...
TXTv=spf1 include:_spf.google.com ~all
SOAmaster.linux.EDUeduard@linuxlabs.com 2025-12-07 #1

edu

DNSSEC🔒 Signed (DS record present)
NSa.edu-servers.net ⭐
NSb.edu-servers.net
NSc.edu-servers.net
NSd.edu-servers.net
NSe.edu-servers.net
NSf.edu-servers.net
NSg.edu-servers.net
NSh.edu-servers.net
NSi.edu-servers.net
NSj.edu-servers.net
NSk.edu-servers.net
NSl.edu-servers.net
NSm.edu-servers.net
SOAa.edu-servers.netnstld@verisign-grs.com serial=1776966856

Subdomains

ns1.linux.edu
web.linux.edu
crux.linux.edu
charybdis.linux.edu
master.linux.edu
www.linux.edu
titan.linux.edu

Same first word

linux.net.pk
linux.do
linux.ne.kr
linux.com.vn
linux.gd
linux.uk.com
linux.bialystok.pl
linux.ninja
linux.cat
linux.ba
linux.zip
linux.hu
linux.net.ar
linux.com.pl
linux.al
linux.wiki
linux.org.ua
linux.szczecin.pl
linux.web.tr
linux.watch
linux.org.ba
linux.or.id
linux.tips
linux.pizza
linux.dev
linux.ie
linux.es
linux.email
linux.co.uk
linux.name.tr
linux.ovh
linux.slupsk.pl
linux.org.mx
linux.college
linux.my
linux.land
linux.krakow.pl
linux.lviv.ua
linux.mx
linux.gda.pl
linux.lublin.pl
linux.edu
linux.or.jp
linux.ac
linux.lu
linux.nic.in
linux.org.es
linux.net.ru
linux.center
linux.solutions
linux.net.cn
linux.co.id
linux.org.hk
linux.im
linux.bielsko.pl
linux.org.ve
linux.bz
linux.net.pl
linux.co.hu
linux.sg
linux.zone
linux.hr
linux.co.ke
linux.com.fr
linux.co.at
linux.rs
linux.net.tr
linux.in
linux.tel
linux.eu
linux.org.tr
linux.fail
linux.am
linux.run
linux.ca
linux.pictures
linux.directory
linux.org.ru
linux.org.py
linux.frl
linux.ch
linux.kg
linux.lat
linux.org.ph
linux.kr
linux.toys
linux.no
linux.org.mt
linux.aq
linux.com.es
linux.monster
linux.report
linux.ec
linux.systems
linux.events
linux.repair
linux.or.kr
linux.download
linux.casa
linux.co.kr
linux.careers
linux.biz
linux.ru
linux.cz
linux.kiev.ua
linux.lv
linux.community
linux.org.au
linux.st
linux.pf
linux.at
linux.org.na
linux.academy
linux.or.tz
linux.org.pe
linux.edu.lv
linux.ro
linux.technology
linux.sh.cn
linux.vc
linux.su

Similar names

linux.tc
linux.conf.au
lunix.com.ar
linux.gen.nz
lunix.org
linux.gr
linux.lol
linux.uk
linux.coffee
nuxli.ch
xunli.xyz
ulinx.io
inlux.eu
lunix.at
nilux.com.br
luxin.co
inlux.cn
linxu.de
luxin.it
lixun.com
lunix.hu
xulin.com
luxin.dnsalias.com
inlux.org
xinul.de
ulnix.ru
nilux.fr
nulix.ca
unlix.com
xulin.de
xunil.co.nz
inlux.sk
xunil.net
lunix.ch
nilux.net
inlux.ru
nuxli.net
lixun.sg
lunix.dk
xunil.com
luxin.me
xinlu.com
nilux.no
luxin.net
xulin.info
nuxli.biz
lixun.tw
nuxli.com
xunil.at
nuxli.be
ulnix.com
inlux.com

DNS History

14 records (12 active, 2 former)

20162017201820192020202120222023202420252026NScharybdis.linux.educrux.linux.edumaster.linux.eduns1.signal1network.comns2.signal1network.comMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx.l.google.comaspmx2.googlemail.comaspmx3.googlemail.comaspmx4.googlemail.comaspmx5.googlemail.comA2001:41d0:a:62c4::137.187.109.196
●NScharybdis.linux.edu2026-03-03 → 2026-04-23 · 3 obs
○ 2015-07-08 10:38:24
● 2026-03-03 01:13:32
● 2026-04-23 17:54:52
●NScrux.linux.edu2026-03-03 → 2026-04-23 · 3 obs
○ 2015-07-08 10:38:24
● 2026-03-03 01:13:32
● 2026-04-23 17:54:52
●NSmaster.linux.edu2015-07-08 → 2026-04-23 · 2 obs
● 2015-07-08 10:38:24
● 2026-04-23 17:54:52
○NSns1.signal1network.com2015-07-08 → 2026-04-22 · 29 obs
● 2015-07-08 10:38:24
● 2026-03-03 01:13:32
○ 2026-03-04 02:26:02
○ 2026-03-13 05:33:20
● 2026-03-13 19:49:28
● 2026-03-14 06:28:50
○ 2026-03-23 14:49:56
○ 2026-03-26 08:24:36
● 2026-03-27 16:41:54
● 2026-03-29 00:03:44
○ 2026-03-29 00:54:06
○ 2026-03-30 07:54:30
● 2026-03-30 19:03:56
● 2026-04-02 21:16:04
○ 2026-04-02 23:50:04
○ 2026-04-05 11:11:48
● 2026-04-05 22:49:50
○ 2026-04-06 23:25:56
○ 2026-04-07 00:33:04
● 2026-04-08 03:08:56
● 2026-04-11 22:43:46
○ 2026-04-13 14:04:50
○ 2026-04-16 01:23:44
● 2026-04-19 14:19:24
○ 2026-04-19 23:38:28
● 2026-04-22 02:07:02
● 2026-04-22 15:09:12
○ 2026-04-23 01:02:30
○ 2026-04-23 17:54:52
○NSns2.signal1network.com2015-07-08 → 2026-04-22 · 29 obs
● 2015-07-08 10:38:24
● 2026-03-03 01:13:32
○ 2026-03-04 02:26:02
○ 2026-03-13 05:33:20
● 2026-03-13 19:49:28
● 2026-03-14 06:28:50
○ 2026-03-23 14:49:56
○ 2026-03-26 08:24:36
● 2026-03-27 16:41:54
● 2026-03-29 00:03:44
○ 2026-03-29 00:54:06
○ 2026-03-30 07:54:30
● 2026-03-30 19:03:56
● 2026-04-02 21:16:04
○ 2026-04-02 23:50:04
○ 2026-04-05 11:11:48
● 2026-04-05 22:49:50
○ 2026-04-06 23:25:56
○ 2026-04-07 00:33:04
● 2026-04-08 03:08:56
● 2026-04-11 22:43:46
○ 2026-04-13 14:04:50
○ 2026-04-16 01:23:44
● 2026-04-19 14:19:24
○ 2026-04-19 23:38:28
● 2026-04-22 02:07:02
● 2026-04-22 15:09:12
○ 2026-04-23 01:02:30
○ 2026-04-23 17:54:52
●MXalt1.aspmx.l.google.com2015-07-08 → 2026-04-23 · 2 obs
● 2015-07-08 10:38:24
● 2026-04-23 17:54:52
●MXalt2.aspmx.l.google.com2015-07-08 → 2026-04-23 · 2 obs
● 2015-07-08 10:38:24
● 2026-04-23 17:54:52
●MXaspmx.l.google.com2015-07-08 → 2026-04-23 · 2 obs
● 2015-07-08 10:38:24
● 2026-04-23 17:54:52
●MXaspmx2.googlemail.com2015-07-08 → 2026-04-23 · 2 obs
● 2015-07-08 10:38:24
● 2026-04-23 17:54:52
●MXaspmx3.googlemail.com2015-07-08 → 2026-04-23 · 2 obs
● 2015-07-08 10:38:24
● 2026-04-23 17:54:52
●MXaspmx4.googlemail.com2015-07-08 → 2026-04-23 · 2 obs
● 2015-07-08 10:38:24
● 2026-04-23 17:54:52
●MXaspmx5.googlemail.com2015-07-08 → 2026-04-23 · 2 obs
● 2015-07-08 10:38:24
● 2026-04-23 17:54:52
●A2001:41d0:a:62c4::12015-07-08 → 2026-04-23 · 2 obs
● 2015-07-08 10:38:24
● 2026-04-23 17:54:52
●A37.187.109.1962015-07-08 → 2026-04-23 · 2 obs
● 2015-07-08 10:38:24
● 2026-04-23 17:54:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
edue.edu-servers.net, h.edu-servers.net, d.edu-servers.net, c.edu-servers.net...-
linux.edumaster.linux.edu, ns2.signal1network.com, ns1.signal1network.com, charybdis.linux.edu3 records

✅ Authoritative Response

Server:37.187.109.196

NS records: master.linux.edu, ns2.signal1network.com, ns1.signal1network.com, charybdis.linux.edu

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for linux.edu (unsigned zone)

⏱️ Timing

Total: 330ms | Queries: -

📄 Records

TypeCountSample Data
A137.187.109.196
AAAA12001:41d0:a:62c4::1
NS3charybdis.linux.EDU, crux.linux.edu...
MX7ALT1.ASPMX.L.GOOGLE.COM (pri: 20), ASPMX5.GOOGLEMAIL.COM (pri: 30)...
TXT2v=spf1 include:_spf.google.com ~all, v=DMARC1; p=reject; rua=mailto:postmaste
SOA1master.linux.EDU eduard.linuxlabs.com

📌 Glue Records Collected

Total: 3

In-bailiwick: 3 (master.linux.edu, master.linux.edu, charybdis.linux.edu)

Analysis

Hierarchy

linux.edu is the parent of ns1.linux.edu, web.linux.edu, crux.linux.edu, charybdis.linux.edu, master.linux.edu and a few other host names.

IP Addresses

linux.edu resolves to two IP numbers: 2001:41d0:a:62c4::1 and 37.187.109.196.

other host names including crux.linux.edu, www.securityrisk.org, securityrisk.org, edzoe.net and ns.ownme.org share IP numbers with linux.edu.

Name Servers

linux.edu is delegated to three name servers charybdis.linux.edu, crux.linux.edu and master.linux.edu.

Host names with three IP numbers:

Host name crux.linux.edu points to 2001:41d0:a:62c4::1, 37.187.109.196 and 172.205.254.133.

Host names with two IP numbers:

Host name master.linux.edu points to 2001:41d0:a:62c4::1 and 37.187.109.196.

Host names with one IP number:

Host name charybdis.linux.edu points to 35.211.12.166.

Host names that point to 2001:41d0:a:62c4::1: crux.linux.edu, master.linux.edu.

Host names that point to 37.187.109.196: crux.linux.edu, master.linux.edu.

Mail Servers

linux.edu is handled by seven mail servers: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com, aspmx5.googlemail.com, aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.

linux.edu shares some mail servers with other domains, at least partially, for instance ns500693.ns500693.ns500699.ns500699.ns500693.ns500734.ns500693.ns500693.ns500693.ns500693.ns500699.ns500693.ns500588.ns500632.ns500612.ns500612.ns500110.dtrkdll.com, ns500742.ns500754.ns500742.ns500754.ns500754.ns500731.ns500704.ns500131.lustychickser.com, ns500754.ns500671.ns500742.ns500731.ns500671.ns500704.ns500688.ns500705.ns500688.ns500649.ns500291.ns500131.lustychickser.com, ns500759.ns500758.ns500758.ns500698.ns500698.ns500736.ns500698.ns500698.ns500698.ns500736.ns500698.ns500708.ns500698.ns500652.ns500619.trackreceptor.com and ns500759.ns500759.ns500698.ns500759.ns500736.ns500735.ns500736.ns500736.ns500735.ns500576.ns500698.ns500686.ns500576.ns500619.trackreceptor.com.

These mail servers are commonly used alongside alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.

Host names with two IP numbers:

Name aspmx2.googlemail.com points to 2607:f8b0:4023:2801::1a and 192.178.128.27.

Name aspmx3.googlemail.com points to 2607:f8b0:4023:3003::1a and 172.253.145.27.

Name aspmx4.googlemail.com points to 2a00:1450:4009:c0f::1a and 192.178.223.27.

Name aspmx5.googlemail.com points to 2a00:1450:400c:c00::1b and 173.194.76.27.

Name aspmx.l.google.com points to 2607:f8b0:4023:c03::1b and 74.125.137.27.

Name alt1.aspmx.l.google.com points to 2607:f8b0:4023:2801::1b and 192.178.128.27.

Name alt2.aspmx.l.google.com points to 2607:f8b0:4023:3003::1b and 172.253.145.26.

Names pointing to 192.178.128.27: aspmx2.googlemail.com and alt1.aspmx.l.google.com.