os-naruc.cz - robtex.com

os-naruc.cz

DNSSEC🔒 Signed (DS record present)
A2001:1528:240::15🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network
PTRkrios.blueboard.cz
A217.11.249.139🇨🇿 CASABLANCA-AS217.11.248.0/23 Casablanca INT
NSshinzon.blueboard.cz ⭐
A2a00:1ed0:45::b🇨🇿 VSHOSTING2a00:1ed0::/32
PTRshinzon.blueboard.cz
A178.251.187.7🇨🇿 VSHOSTING178.251.184.0/21
PTRshinzon.blueboard.cz
NSjaguar.blueboard.cz ⚠️ Not in zone NS records
A2a00:1ed0:45::c🇨🇿 VSHOSTING2a00:1ed0::/32
PTRjaguar.blueboard.cz
A178.251.187.8🇨🇿 VSHOSTING178.251.184.0/21
PTRjaguar.blueboard.cz
NSns2.blueboard.cz
A2a01:4f8:13b:8d4::2🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
A195.201.57.122🇩🇪 Hetzner195.201.0.0/16 HETZNER-DC
PTRns2.blueboard.cz
MXmx.blueboard.cz ⭐
A2001:1528:240::ca🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network
PTRmx.blueboard.cz
A81.0.209.130🇨🇿 CASABLANCA-AS81.0.208.0/23 Casablanca INT
PTRmx.blueboard.cz
TXTv=spf1 a mx include:spf.blueboard.cz -all
SOAshinzon.blueboard.czhostmaster@blueboard.cz 2023-07-25 #37

cz

DNSSEC🔒 Signed (DS record present)
NSa.ns.nic.cz ⭐
NSb.ns.nic.cz
NSc.ns.nic.cz
NSd.ns.nic.cz
SOAa.ns.nic.czhostmaster@nic.cz serial=1776970033

Subdomains

smtp.os-naruc.cz

Same first word

os-naruc.cz

Similar names

cora-sun.de

DNS History

15 records (6 active, 9 former)

20162017201820192020202120222023202420252026NSjaguar.blueboard.czns2.blueboard.czshinzon.blueboard.czns1.ignum.comns2.ignum.czMXmx.blueboard.czalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx.l.google.comaspmx2.googlemail.comaspmx3.googlemail.comsmtp01.netadmin.czA2001:1528:240::15217.11.249.13978.24.14.42
●NSjaguar.blueboard.cz2026-02-19 → 2026-04-23 · 3 obs
○ 2018-06-04 01:35:56
● 2026-02-19 10:11:02
● 2026-04-23 19:20:24
○NSns1.ignum.com2015-04-04 → 2018-06-04 · 4 obs
● 2015-04-04 12:11:20
● 2018-06-04 01:35:56
○ 2026-02-19 10:11:02
○ 2026-04-23 19:20:24
●NSns2.blueboard.cz2026-02-19 → 2026-04-23 · 3 obs
○ 2018-06-04 01:35:56
● 2026-02-19 10:11:02
● 2026-04-23 19:20:24
○NSns2.ignum.cz2015-04-04 → 2018-06-04 · 4 obs
● 2015-04-04 12:11:20
● 2018-06-04 01:35:56
○ 2026-02-19 10:11:02
○ 2026-04-23 19:20:24
●NSshinzon.blueboard.cz2026-02-19 → 2026-04-23 · 3 obs
○ 2018-06-04 01:35:56
● 2026-02-19 10:11:02
● 2026-04-23 19:20:24
○MXalt1.aspmx.l.google.com2015-04-04 → 2018-06-04 · 4 obs
● 2015-04-04 12:11:20
● 2018-06-04 01:35:56
○ 2026-02-19 10:11:02
○ 2026-04-23 19:20:24
○MXalt2.aspmx.l.google.com2015-04-04 → 2018-06-04 · 4 obs
● 2015-04-04 12:11:20
● 2018-06-04 01:35:56
○ 2026-02-19 10:11:02
○ 2026-04-23 19:20:24
○MXaspmx.l.google.com2015-04-04 → 2018-06-04 · 4 obs
● 2015-04-04 12:11:20
● 2018-06-04 01:35:56
○ 2026-02-19 10:11:02
○ 2026-04-23 19:20:24
○MXaspmx2.googlemail.com2015-04-04 → 2018-06-04 · 4 obs
● 2015-04-04 12:11:20
● 2018-06-04 01:35:56
○ 2026-02-19 10:11:02
○ 2026-04-23 19:20:24
○MXaspmx3.googlemail.com2015-04-04 → 2018-06-04 · 4 obs
● 2015-04-04 12:11:20
● 2018-06-04 01:35:56
○ 2026-02-19 10:11:02
○ 2026-04-23 19:20:24
●MXmx.blueboard.cz2026-02-19 → 2026-04-23 · 3 obs
○ 2018-06-04 01:35:56
● 2026-02-19 10:11:02
● 2026-04-23 19:20:24
○MXsmtp01.netadmin.cz2017-01-09 → 2018-06-04 · 5 obs
○ 2015-04-04 12:11:20
● 2017-01-09 18:47:40
● 2018-06-04 01:35:56
○ 2026-02-19 10:11:02
○ 2026-04-23 19:20:24
●A2001:1528:240::152026-02-19 → 2026-04-23 · 3 obs
○ 2018-06-04 01:35:56
● 2026-02-19 10:11:02
● 2026-04-23 19:20:24
●A217.11.249.1392026-02-19 → 2026-04-23 · 3 obs
○ 2018-06-04 01:35:56
● 2026-02-19 10:11:02
● 2026-04-23 19:20:24
○A78.24.14.422015-04-04 → 2018-06-04 · 4 obs
● 2015-04-04 12:11:20
● 2018-06-04 01:35:56
○ 2026-02-19 10:11:02
○ 2026-04-23 19:20:24

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czb.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz, a.ns.nic.cz-
os-naruc.czns2.blueboard.cz, jaguar.blueboard.cz, shinzon.blueboard.cz3 records

✅ Authoritative Response

Server:178.251.187.8

NS records: ns2.blueboard.cz, jaguar.blueboard.cz, shinzon.blueboard.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 881ms | Queries: -

📄 Records

TypeCountSample Data
A1217.11.249.139
AAAA12001:1528:240::15
NS2shinzon.blueboard.cz, ns2.blueboard.cz
MX1mx.blueboard.cz (pri: 10)
TXT1v=spf1 a mx include:spf.blueboard.cz -al
SOA1shinzon.blueboard.cz hostmaster.blueboar

📌 Glue Records Collected

Total: 3

Out-of-bailiwick: 3 (ns2.blueboard.cz, jaguar.blueboard.cz, shinzon.blueboard.cz)

Analysis

Hierarchy

os-naruc.cz is the parent of smtp.os-naruc.cz.

IP Addresses

os-naruc.cz resolves to two IP numbers: 2001:1528:240::15 and 217.11.249.139.

other host names including dvoraci.eu, vain.cz, via-ferrata.sk, veny.eu and rockmag.cz share IP numbers with os-naruc.cz.

Name Servers

os-naruc.cz is delegated to three name servers jaguar.blueboard.cz, ns2.blueboard.cz and shinzon.blueboard.cz.

os-naruc.cz at least partially shares name servers with other domains, for instance triboos.cz, tkt-prague.com, a-list.pro, magazinekonom.cz and esmi.cz.

Host names with two IP numbers:

jaguar.blueboard.cz points to: 2a00:1ed0:45::c and 178.251.187.8.

ns2.blueboard.cz points to: 2a01:4f8:13b:8d4::2 and 195.201.57.122.

shinzon.blueboard.cz points to: 2a00:1ed0:45::b and 178.251.187.7.

Mail Servers

os-naruc.cz is handled by a single mail server, mx.blueboard.cz.

os-naruc.cz shares the same mail server setup as other domains, for instance bomavet.cz, vydarely-holomac.cz, niceone.cz, aj-partner.com and fiveten.cz.

os-naruc.cz shares mail servers with other domains to some extent, for instance qtw.cz.

mx.blueboard.cz resolves to two IP numbers: 2001:1528:240::ca and 81.0.209.130.