undr.cz - robtex.com

undr.cz

DNSSEC🔒 Signed (DS record present)
A2606:4700:3030::ac43:b38f🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::6815:23cc🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.35.204Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.179.143🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSmimi.ns.cloudflare.com ⭐
A2606:4700:50::adf5:3acb🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmimi.ns.cloudflare.com
A2803:f800:50::6ca2:c0cb🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRmimi.ns.cloudflare.com
A2a06:98c1:50::ac40:20cb🇺🇸 Cloudflare2a06:98c1:50::/45
PTRmimi.ns.cloudflare.com
A108.162.192.203🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmimi.ns.cloudflare.com
A172.64.32.203🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmimi.ns.cloudflare.com
A173.245.58.203🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmimi.ns.cloudflare.com
NSpiotr.ns.cloudflare.com
A2606:4700:58::adf5:3bde🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRpiotr.ns.cloudflare.com
A2803:f800:50::6ca2:c1de🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRpiotr.ns.cloudflare.com
A2a06:98c1:50::ac40:21de🇺🇸 Cloudflare2a06:98c1:50::/45
PTRpiotr.ns.cloudflare.com
A108.162.193.222🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRpiotr.ns.cloudflare.com
A172.64.33.222🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRpiotr.ns.cloudflare.com
A173.245.59.222🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRpiotr.ns.cloudflare.com
MXaspmx.l.google.com ⭐
A2607:f8b0:4004:c06::1b🇺🇸 Google2607:f8b0:4004::/48
PTRbg-in-f27.1e100.net
A192.178.155.27🇺🇸 Google192.178.155.0/24
PTRyuiadrs-in-f27.1e100.net
MXalt1.aspmx.l.google.com(5)
A2800:3f0:4003:c0f::1b🇨🇱 Google2800:3f0:4003::/48
A108.177.123.27🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f27.1e100.net
MXalt2.aspmx.l.google.com(5)
A2607:f8b0:4023:3003::1a🇺🇸 Google2607:f8b0::/32
PTRyulnkjt-in-f26.1e100.net
A172.253.145.26🇺🇸 Google172.253.145.0/24
PTRyulnkjt-in-f26.1e100.net
MXaspmx2.googlemail.com(10)
A2800:3f0:4003:c0f::1a🇨🇱 Google2800:3f0:4003::/48
A108.177.123.26🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f26.1e100.net
MXaspmx3.googlemail.com(10)
A2a00:1450:400b:c02::1b🇮🇪 Google2a00:1450:400b::/48
PTRdj-in-f27.1e100.net
A172.253.116.27🇺🇸 Google172.253.116.0/24
PTRdj-in-f27.1e100.net
TXTgoogle-site-verification=b_zZYOy-HjppYisZJt9rXudazz-oNb3l4hLC6Z_TDZM
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.35.204, 172.67.179.143
IPv6 hints2606:4700:3030::ac43:b38f, 2606:4700:3035::6815:23cc
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=106, name=cloudflare-ech.com
SOAmimi.ns.cloudflare.comdns@cloudflare.com serial=2401355013

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=1777006036

Same first word

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undr.org
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Similar names

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dunr.cn
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rund.com

DNS History

15 records (11 active, 4 former)

201820192020202120222023202420252026NSmimi.ns.cloudflare.compiotr.ns.cloudflare.comMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx.l.google.comaspmx2.googlemail.comaspmx3.googlemail.comA104.21.35.204172.67.179.1432606:4700:3030::ac43:b38f2606:4700:3035::6815:23cc104.18.42.177104.18.43.1772400:cb00:2048:1::6812:2ab12400:cb00:2048:1::6812:2bb1
●NSmimi.ns.cloudflare.com2017-03-16 → 2026-04-24 · 2 obs
● 2017-03-16 14:11:36
● 2026-04-24 05:25:52
●NSpiotr.ns.cloudflare.com2017-03-16 → 2026-04-24 · 2 obs
● 2017-03-16 14:11:36
● 2026-04-24 05:25:52
●MXalt1.aspmx.l.google.com2017-03-16 → 2026-04-24 · 2 obs
● 2017-03-16 14:11:36
● 2026-04-24 05:25:52
●MXalt2.aspmx.l.google.com2017-03-16 → 2026-04-24 · 2 obs
● 2017-03-16 14:11:36
● 2026-04-24 05:25:52
●MXaspmx.l.google.com2017-03-16 → 2026-04-24 · 2 obs
● 2017-03-16 14:11:36
● 2026-04-24 05:25:52
●MXaspmx2.googlemail.com2017-03-16 → 2026-04-24 · 2 obs
● 2017-03-16 14:11:36
● 2026-04-24 05:25:52
●MXaspmx3.googlemail.com2017-03-16 → 2026-04-24 · 2 obs
● 2017-03-16 14:11:36
● 2026-04-24 05:25:52
○A104.18.42.1772017-03-16 → 2017-03-16 · 3 obs
● 2017-03-16 14:11:36
○ 2026-03-25 22:38:10
○ 2026-04-24 05:25:52
○A104.18.43.1772017-03-16 → 2017-03-16 · 3 obs
● 2017-03-16 14:11:36
○ 2026-03-25 22:38:10
○ 2026-04-24 05:25:52
●A104.21.35.2042026-03-25 → 2026-04-24 · 3 obs
○ 2017-03-16 14:11:36
● 2026-03-25 22:38:10
● 2026-04-24 05:25:52
●A172.67.179.1432026-03-25 → 2026-04-24 · 3 obs
○ 2017-03-16 14:11:36
● 2026-03-25 22:38:10
● 2026-04-24 05:25:52
○A2400:cb00:2048:1::6812:2ab12017-03-16 → 2017-03-16 · 3 obs
● 2017-03-16 14:11:36
○ 2026-03-25 22:38:10
○ 2026-04-24 05:25:52
○A2400:cb00:2048:1::6812:2bb12017-03-16 → 2017-03-16 · 3 obs
● 2017-03-16 14:11:36
○ 2026-03-25 22:38:10
○ 2026-04-24 05:25:52
●A2606:4700:3030::ac43:b38f2026-03-25 → 2026-04-24 · 3 obs
○ 2017-03-16 14:11:36
● 2026-03-25 22:38:10
● 2026-04-24 05:25:52
●A2606:4700:3035::6815:23cc2026-03-25 → 2026-04-24 · 3 obs
○ 2017-03-16 14:11:36
● 2026-03-25 22:38:10
● 2026-04-24 05:25:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czd.ns.nic.cz, c.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz-
undr.czmimi.ns.cloudflare.com, piotr.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.192.203

NS records: mimi.ns.cloudflare.com, piotr.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 760ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.35.204, 172.67.179.143
AAAA22606:4700:3035::6815:23cc, 2606:4700:3030::ac43:b38f
NS2mimi.ns.cloudflare.com, piotr.ns.cloudflare.com
MX5aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)...
TXT1google-site-verification=b_zZYOy-HjppYis
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1mimi.ns.cloudflare.com dns.cloudflare.co

Analysis

IP Addresses

undr.cz points to four IP numbers: 2606:4700:3030::ac43:b38f, 2606:4700:3035::6815:23cc, 104.21.35.204 and 172.67.179.143.

For instance, other host names 2025work.com, wikiformat.com, www.gametrove.net, hennue.com and ruiyingbo.com share IP numbers with undr.cz.

Name Servers

undr.cz is delegated to two name servers: mimi.ns.cloudflare.com and piotr.ns.cloudflare.com.

undr.cz uses the same name server setup as other domains such as vyapaarjagat.com, bellofpeace.org, tobias-kluge.com, dva.com.tr and kingschurchbirmingham.org.

undr.cz shares name servers with other domains at least partially, for example getpark.co.uk, jsddgg.com, ourgames.ru, janene.net and tehnojam.pro.

These name servers are commonly used with the name servers dave.ns.cloudflare.com and betty.ns.cloudflare.com.

Host names with six IP numbers: host name mimi.ns.cloudflare.com points to: 2606:4700:50::adf5:3acb, 2803:f800:50::6ca2:c0cb, 2a06:98c1:50::ac40:20cb, 108.162.192.203, 172.64.32.203 and 173.245.58.203; host name piotr.ns.cloudflare.com points to: 2606:4700:58::adf5:3bde, 2803:f800:50::6ca2:c1de, 2a06:98c1:50::ac40:21de, 108.162.193.222, 172.64.33.222 and 173.245.59.222.

Mail Servers

Five mail servers handle undr.cz: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.

undr.cz shares mail servers with other domains at least partially; for instance halloleinwand.de, ns500737.ns500724.ns500599.ns500737.ns500737.ns500724.ns500724.ns500737.ns500737.ns500737.ns500583.ns500583.ns500697.ns500583.ns500583.ns500583.www.yummyflingsfinder.com, ns500759.ns500758.ns500758.ns500758.ns500735.ns500735.ns500735.ns500736.ns500735.ns500735.ns500698.ns500576.ns500708.ns500698.ns500652.ns500619.ns500619.trackreceptor.com, ns500758.ns500759.ns500759.ns500759.ns500758.ns500736.ns500698.ns500736.ns500698.ns500698.ns500735.ns500576.ns500698.ns500698.ns500698.ns500619.ns500619.trackreceptor.com and girlsgofly.com.

These mail servers are often used alongside alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx4.googlemail.com and aspmx5.googlemail.com.

Host names with two IP numbers:

aspmx2.googlemail.com points to 2800:3f0:4003:c0f::1a and 108.177.123.26

aspmx3.googlemail.com points to 2a00:1450:400b:c02::1b and 172.253.116.27

aspmx.l.google.com points to 2607:f8b0:4004:c06::1b and 192.178.155.27

alt1.aspmx.l.google.com points to 2800:3f0:4003:c0f::1b and 108.177.123.27

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