simtech.cz - dns.ninja

simtech.cz

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:ddd🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::ac43:854d🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.13.221Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.133.77🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSnena.ns.cloudflare.com ⭐
A2606:4700:50::a29f:26a1🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnena.ns.cloudflare.com
A2803:f800:50::6ca2:c2a1🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRnena.ns.cloudflare.com
A2a06:98c1:50::ac40:22a1🇺🇸 Cloudflare2a06:98c1:50::/45
PTRnena.ns.cloudflare.com
A108.162.194.161🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnena.ns.cloudflare.com
A162.159.38.161Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnena.ns.cloudflare.com
A172.64.34.161🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnena.ns.cloudflare.com
NSnewt.ns.cloudflare.com
A2606:4700:58::adf5:3bd4🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnewt.ns.cloudflare.com
A2803:f800:50::6ca2:c1d4🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRnewt.ns.cloudflare.com
A2a06:98c1:50::ac40:21d4🇺🇸 Cloudflare2a06:98c1:50::/45
PTRnewt.ns.cloudflare.com
A108.162.193.212🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnewt.ns.cloudflare.com
A172.64.33.212🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnewt.ns.cloudflare.com
A173.245.59.212🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnewt.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.13.221, 172.67.133.77
IPv6 hints2606:4700:3032::6815:ddd, 2606:4700:3033::ac43:854d
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=97, name=cloudflare-ech.com
SOAnena.ns.cloudflare.comdns@cloudflare.com serial=2407489907

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=1785532641

Same first word

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ismtech.org

DNS History

30 records (6 active, 24 former)

202120222023202420252026NSnena.ns.cloudflare.comnewt.ns.cloudflare.comguy.ns.cloudflare.comns.wedos.comns.wedos.czns.wedos.euns.wedos.netns1.parkingcrew.netns2.parkingcrew.netursula.ns.cloudflare.comMXmail.h-email.netwes1-mx-backup.wedos.netwes1-mx1.wedos.netwes1-mx2.wedos.netA104.21.13.221172.67.133.772606:4700:3032::6815:ddd2606:4700:3033::ac43:854d104.21.76.27104.247.81.99172.67.186.26188.114.96.0188.114.97.02606:4700:3031::6815:4c1b2606:4700:3037::ac43:ba1a2a06:98c1:3120::2a06:98c1:3120::42a06:98c1:3121::2a06:98c1:3121::489.221.213.47
○NSguy.ns.cloudflare.com2026-05-17 → 2026-05-17 · 4 obs
○ 2026-02-16 13:20:52
● 2026-05-17 08:20:46
○ 2026-06-03 15:11:50
○ 2026-07-31 21:41:50
●NSnena.ns.cloudflare.com2026-07-10 → 2026-07-31 · 3 obs
○ 2026-06-03 15:11:50
● 2026-07-10 05:55:16
● 2026-07-31 21:41:50
●NSnewt.ns.cloudflare.com2026-07-10 → 2026-07-31 · 3 obs
○ 2026-06-03 15:11:50
● 2026-07-10 05:55:16
● 2026-07-31 21:41:50
○NSns.wedos.com2020-02-17 → 2020-02-17 · 3 obs
● 2020-02-17 06:48:46
○ 2026-02-16 13:20:52
○ 2026-07-31 21:41:50
○NSns.wedos.cz2020-02-17 → 2020-02-17 · 3 obs
● 2020-02-17 06:48:46
○ 2026-02-16 13:20:52
○ 2026-07-31 21:41:50
○NSns.wedos.eu2020-02-17 → 2020-02-17 · 3 obs
● 2020-02-17 06:48:46
○ 2026-02-16 13:20:52
○ 2026-07-31 21:41:50
○NSns.wedos.net2020-02-17 → 2020-02-17 · 3 obs
● 2020-02-17 06:48:46
○ 2026-02-16 13:20:52
○ 2026-07-31 21:41:50
○NSns1.parkingcrew.net2026-02-16 → 2026-02-16 · 4 obs
○ 2020-02-17 06:48:46
● 2026-02-16 13:20:52
○ 2026-05-17 08:20:46
○ 2026-07-31 21:41:50
○NSns2.parkingcrew.net2026-02-16 → 2026-02-16 · 4 obs
○ 2020-02-17 06:48:46
● 2026-02-16 13:20:52
○ 2026-05-17 08:20:46
○ 2026-07-31 21:41:50
○NSursula.ns.cloudflare.com2026-05-17 → 2026-05-17 · 4 obs
○ 2026-02-16 13:20:52
● 2026-05-17 08:20:46
○ 2026-06-03 15:11:50
○ 2026-07-31 21:41:50
○MXmail.h-email.net2026-02-16 → 2026-02-16 · 4 obs
○ 2020-02-17 06:48:46
● 2026-02-16 13:20:52
○ 2026-05-17 08:20:46
○ 2026-07-31 21:41:50
○MXwes1-mx-backup.wedos.net2020-02-17 → 2026-02-16 · 4 obs
● 2020-02-17 06:48:46
● 2026-02-16 13:20:52
○ 2026-05-17 08:20:46
○ 2026-07-31 21:41:50
○MXwes1-mx1.wedos.net2020-02-17 → 2026-02-16 · 4 obs
● 2020-02-17 06:48:46
● 2026-02-16 13:20:52
○ 2026-05-17 08:20:46
○ 2026-07-31 21:41:50
○MXwes1-mx2.wedos.net2020-02-17 → 2026-02-16 · 4 obs
● 2020-02-17 06:48:46
● 2026-02-16 13:20:52
○ 2026-05-17 08:20:46
○ 2026-07-31 21:41:50
●A104.21.13.2212026-07-31 → 2026-07-31 · 2 obs
○ 2026-07-10 06:54:10
● 2026-07-31 21:41:50
○A104.21.76.272026-05-17 → 2026-05-17 · 4 obs
○ 2026-02-16 13:20:52
● 2026-05-17 08:20:46
○ 2026-06-03 15:11:50
○ 2026-07-31 21:41:50
○A104.247.81.992026-02-16 → 2026-02-16 · 4 obs
○ 2020-02-17 06:48:46
● 2026-02-16 13:20:52
○ 2026-05-17 08:20:46
○ 2026-07-31 21:41:50
●A172.67.133.772026-07-31 → 2026-07-31 · 2 obs
○ 2026-07-10 06:54:10
● 2026-07-31 21:41:50
○A172.67.186.262026-05-17 → 2026-05-17 · 4 obs
○ 2026-02-16 13:20:52
● 2026-05-17 08:20:46
○ 2026-06-03 15:11:50
○ 2026-07-31 21:41:50
○A188.114.96.02026-07-10 → 2026-07-10 · 3 obs
○ 2026-06-03 15:11:50
● 2026-07-10 05:55:16
○ 2026-07-31 21:41:50
○A188.114.97.02026-07-10 → 2026-07-10 · 3 obs
○ 2026-06-03 15:11:50
● 2026-07-10 05:55:16
○ 2026-07-31 21:41:50
○A2606:4700:3031::6815:4c1b2026-05-17 → 2026-05-17 · 4 obs
○ 2026-02-16 13:20:52
● 2026-05-17 08:20:46
○ 2026-06-03 15:11:50
○ 2026-07-31 21:41:50
●A2606:4700:3032::6815:ddd2026-07-31 → 2026-07-31 · 2 obs
○ 2026-07-10 06:54:10
● 2026-07-31 21:41:50
●A2606:4700:3033::ac43:854d2026-07-31 → 2026-07-31 · 2 obs
○ 2026-07-10 06:54:10
● 2026-07-31 21:41:50
○A2606:4700:3037::ac43:ba1a2026-05-17 → 2026-05-17 · 4 obs
○ 2026-02-16 13:20:52
● 2026-05-17 08:20:46
○ 2026-06-03 15:11:50
○ 2026-07-31 21:41:50
○A2a06:98c1:3120::2026-07-10 → 2026-07-10 · 3 obs
○ 2026-07-10 05:55:16
● 2026-07-10 06:54:10
○ 2026-07-31 21:41:50
○A2a06:98c1:3120::42026-07-10 → 2026-07-10 · 4 obs
○ 2026-06-03 15:11:50
● 2026-07-10 05:55:16
○ 2026-07-10 06:54:10
○ 2026-07-31 21:41:50
○A2a06:98c1:3121::2026-07-10 → 2026-07-10 · 3 obs
○ 2026-07-10 05:55:16
● 2026-07-10 06:54:10
○ 2026-07-31 21:41:50
○A2a06:98c1:3121::42026-07-10 → 2026-07-10 · 4 obs
○ 2026-06-03 15:11:50
● 2026-07-10 05:55:16
○ 2026-07-10 06:54:10
○ 2026-07-31 21:41:50
○A89.221.213.472020-02-17 → 2020-02-17 · 3 obs
● 2020-02-17 06:48:46
○ 2026-02-16 13:20:52
○ 2026-07-31 21:41:50

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz-
simtech.cznena.ns.cloudflare.com, newt.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.34.161

NS records: nena.ns.cloudflare.com, newt.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for simtech.cz (unsigned zone)

⏱️ Timing

Total: 838ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.13.221, 172.67.133.77
AAAA22606:4700:3033::ac43:854d, 2606:4700:3032::6815:ddd
NS2nena.ns.cloudflare.com, newt.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1nena.ns.cloudflare.com dns.cloudflare.co

Analysis

IP Addresses

simtech.cz directs to four IP numbers, which are 104.21.13.221, 172.67.133.77, 2606:4700:3032::6815:ddd and 2606:4700:3033::ac43:854d.

Two other host names, along with members.1passforallsites.com, vpnlocker.com and ns2.1xbet-18vip.top, also share IP numbers with simtech.cz.

Name Servers

Two name servers handle the delegation for simtech.cz: nena.ns.cloudflare.com and newt.ns.cloudflare.com.

simtech.cz shares its NS records with other domains, for example zyx.eu, tvy.eu, pragueairport.eu and two others.

There is at least partial name server overlap between simtech.cz and other domains — oxo.moe, sitze.org, dignep.com.np and two more among them.

These name servers frequently co-occur with the name servers harlan.ns.cloudflare.com and alina.ns.cloudflare.com.

DNS names with 6 IP addresses:

nena.ns.cloudflare.com resolves to 108.162.194.161, 162.159.38.161 and 172.64.34.161 among others, with 3 other IP addresses in total.

newt.ns.cloudflare.com resolves to 108.162.193.212, 172.64.33.212 and 173.245.59.212 among others, with 3 other IP addresses in total.