ulva.cz - robtex.com

ulva.cz

DNSSEC🔒 Signed (DS record present)
A20.126.51.172🇳🇱 Microsoft20.64.0.0/10
NSns1.websupport.cz ⭐
A2a10:bbc0::11🇨🇿 ACTIVE24-AS2a10:bbc0::/32
PTRns1.websupport.eu
A45.10.97.11🇨🇿 ACTIVE24-AS45.10.97.0/24
PTRns1.websupport.eu
NSns2.websupport.cz
A2a02:250:3::12🇸🇪 ACTIVE24-AS2a02:250:3::/48
PTRns2.websupport.eu
A185.71.159.12🇸🇪 ACTIVE24-AS185.71.159.0/24
PTRns2.websupport.eu
NSns3.websupport.eu
A2a10:bbc0::13🇨🇿 ACTIVE24-AS2a10:bbc0::/32
PTRns3.websupport.eu
A45.10.97.13🇨🇿 ACTIVE24-AS45.10.97.0/24
PTRns3.websupport.eu
MXulva-cz.mail.protection.outlook.com ⭐
A2a01:111:f403:ca04::1🇮🇪 Microsoft2a01:111:f000::/36
PTRmail-db7pr03cu00401.inbound.protection.outlook.com
A2a01:111:f403:ca09::🇳🇱 Microsoft2a01:111:f000::/36
PTRmail-am3pr04cu00500.inbound.protection.outlook.com
A2a01:111:f403:ca09::1🇳🇱 Microsoft2a01:111:f000::/36
PTRmail-as9pr07cu00301.inbound.protection.outlook.com
A2a01:111:f403:ca09::f🇳🇱 Microsoft2a01:111:f000::/36
PTRmail-am7pr05cu00307.inbound.protection.outlook.com
A52.101.73.4🇳🇱 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-am0pr83cu00404.inbound.protection.outlook.com
A52.101.73.6🇳🇱 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-am6pr04cu00306.inbound.protection.outlook.com
A52.101.73.19🇳🇱 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-as8pr04cu00803.inbound.protection.outlook.com
A52.101.73.153🇳🇱 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-as8pr05cu00401.inbound.protection.outlook.com
TXTMS=ms74474940
TXTv=spf1 include:spf.protection.outlook.com -all
SOAns1.websupport.czadmin@websupport.sk serial=1658924689

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=1784137640

Same first word

ulva.my.id
ulva.com
ulva.net
ulva.de
ulva.no
ulva.co.nz
ulva.org
ulva.dk
ulva.io
ulva.cz

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vula.nl
lavu.de
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luav.org
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valu.nl
uvla.org
luva.nl

DNS History

11 records (5 active, 6 former)

20162017201820192020202120222023202420252026NSns1.websupport.czns2.websupport.czns3.websupport.eualfa.ns.active24.czbeta.ns.active24.czgama.ns.active24.skMXulva-cz.mail.protection.outlook.comin.smtp.czmx.smtp.czA20.126.51.17231.15.12.68
○NSalfa.ns.active24.cz2015-08-06 → 2016-10-07 · 4 obs
● 2015-08-06 00:46:02
● 2016-10-07 08:32:00
○ 2026-06-12 23:04:02
○ 2026-07-15 18:21:28
○NSbeta.ns.active24.cz2015-08-06 → 2016-10-07 · 4 obs
● 2015-08-06 00:46:02
● 2016-10-07 08:32:00
○ 2026-06-12 23:04:02
○ 2026-07-15 18:21:28
○NSgama.ns.active24.sk2015-08-06 → 2016-10-07 · 4 obs
● 2015-08-06 00:46:02
● 2016-10-07 08:32:00
○ 2026-06-12 23:04:02
○ 2026-07-15 18:21:28
●NSns1.websupport.cz2026-06-12 → 2026-07-15 · 3 obs
○ 2016-10-07 08:32:00
● 2026-06-12 23:04:02
● 2026-07-15 18:21:28
●NSns2.websupport.cz2026-06-12 → 2026-07-15 · 3 obs
○ 2016-10-07 08:32:00
● 2026-06-12 23:04:02
● 2026-07-15 18:21:28
●NSns3.websupport.eu2026-06-12 → 2026-07-15 · 3 obs
○ 2016-10-07 08:32:00
● 2026-06-12 23:04:02
● 2026-07-15 18:21:28
○MXin.smtp.cz2015-08-06 → 2016-10-07 · 4 obs
● 2015-08-06 00:46:02
● 2016-10-07 08:32:00
○ 2026-06-12 23:04:02
○ 2026-07-15 18:21:28
○MXmx.smtp.cz2015-08-06 → 2016-10-07 · 4 obs
● 2015-08-06 00:46:02
● 2016-10-07 08:32:00
○ 2026-06-12 23:04:02
○ 2026-07-15 18:21:28
●MXulva-cz.mail.protection.outlook.com2026-06-12 → 2026-07-15 · 3 obs
○ 2016-10-07 08:32:00
● 2026-06-12 23:04:02
● 2026-07-15 18:21:28
●A20.126.51.1722026-06-12 → 2026-07-15 · 3 obs
○ 2016-10-07 08:32:00
● 2026-06-12 23:04:02
● 2026-07-15 18:21:28
○A31.15.12.682015-08-06 → 2016-10-07 · 4 obs
● 2015-08-06 00:46:02
● 2016-10-07 08:32:00
○ 2026-06-12 23:04:02
○ 2026-07-15 18:21:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czc.ns.nic.cz, b.ns.nic.cz, a.ns.nic.cz, d.ns.nic.cz-
ulva.czns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu-

✅ Authoritative Response

Server:45.10.97.11

NS records: ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 415ms | Queries: -

📄 Records

TypeCountSample Data
A120.126.51.172
NS3ns1.websupport.cz, ns2.websupport.cz...
MX1ulva-cz.mail.protection.outlook.com (pri
TXT2MS=ms74474940, v=spf1 include:spf.protection.outlook.co
SOA1ns1.websupport.cz admin.websupport.sk

Analysis

IP Addresses

ulva.cz has exactly one IP address — 20.126.51.172.

rhb.cz, kroceje.cz, enteria.cz plus two other host names have IP numbers in common with ulva.cz.

Name Servers

ulva.cz carries NS records delegating to ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.

ulva.cz has at least partial name server overlap with other domains, such as foxriders.sk, michalskapa.cz, f2sgroup.com and two others.

ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu are three hostnames that each resolve to a pair of IP addresses: ns1.websupport.cz to 45.10.97.11 and 2a10:bbc0::11, ns2.websupport.cz to 185.71.159.12 and 2a02:250:3::12, and ns3.websupport.eu to 45.10.97.13 and 2a10:bbc0::13.

Mail Servers

ulva.cz uses one mail server — ulva-cz.mail.protection.outlook.com.

ulva-cz.mail.protection.outlook.com has 8 IP addresses: 52.101.73.4, 52.101.73.6, 52.101.73.19 plus 5 more.