21run.cz - robtex.com
21run.cz
cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.ns.nic.cz ⭐ 🔒 | ||||||
| NS | b.ns.nic.cz 🔒 | ||||||
| NS | c.ns.nic.cz 🔒 | ||||||
| NS | d.ns.nic.cz 🔒 | ||||||
| SOA | a.ns.nic.czhostmaster@nic.cz serial=1771291036 | ||||||
Same first word
Similar names
DNS History
14 records (7 active, 7 former)
○NSdns.datafarm.de2015-07-13 → 2018-12-18 · 4 obs
● 2018-12-18 11:35:40
○ 2026-02-21 14:56:52
○ 2026-02-21 14:56:54
○NShans.continum.net2015-07-13 → 2018-12-18 · 4 obs
● 2018-12-18 11:35:40
○ 2026-02-21 14:56:52
○ 2026-02-21 14:56:54
●NSlily.ns.cloudflare.com2026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 14:56:52
● 2026-02-21 14:56:54
●NSmerlin.ns.cloudflare.com2026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 14:56:52
● 2026-02-21 14:56:54
●MX_dc-mx.9862a5234ade.21run.cz2026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 14:56:52
● 2026-02-21 14:56:54
○MXmx0.continum.net2015-07-13 → 2018-12-18 · 4 obs
● 2018-12-18 11:35:40
○ 2026-02-21 14:56:52
○ 2026-02-21 14:56:54
○MXmx1.continum.net2015-07-13 → 2018-12-18 · 4 obs
● 2018-12-18 11:35:40
○ 2026-02-21 14:56:52
○ 2026-02-21 14:56:54
●A104.21.25.802026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 14:56:52
● 2026-02-21 14:56:54
●A172.67.223.2512026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 14:56:52
● 2026-02-21 14:56:54
○A213.252.10.1662018-12-18 → 2018-12-18 · 4 obs
● 2018-12-18 11:35:40
○ 2026-02-21 14:56:52
○ 2026-02-21 14:56:54
○A213.252.27.1702017-02-08 → 2017-02-08 · 4 obs
● 2017-02-08 21:27:30
○ 2018-12-18 11:35:40
○ 2026-02-21 14:56:54
●A2606:4700:3031::ac43:dffb2026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 14:56:52
● 2026-02-21 14:56:54
●A2606:4700:3037::6815:19502026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 14:56:52
● 2026-02-21 14:56:54
○A80.72.134.1172015-07-13 → 2016-06-22 · 4 obs
● 2016-06-22 10:44:54
○ 2017-02-08 21:27:30
○ 2026-02-21 14:56:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| 21run.cz | lily.ns.cloudflare.com, merlin.ns.cloudflare.com | - |
✅ Authoritative Response
Server: 173.245.59.205
NS records: lily.ns.cloudflare.com, merlin.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21run.cz (unsigned zone)
⏱️ Timing
Total: 110ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.25.80, 172.67.223.251 |
| AAAA | 2 | 2606:4700:3031::ac43:dffb, 2606:4700:3037::6815:1950 |
| NS | 2 | lily.ns.cloudflare.com, merlin.ns.cloudflare.com |
| MX | 1 | _dc-mx.9862a5234ade.21run.cz (pri: 10) |
| TXT | 1 | v=spf1 include:_spf.transip.email includ |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | lily.ns.cloudflare.com dns.cloudflare.co |
AI analysis
21run.cz maps to four IP numbers: 2606:4700:3031::ac43:dffb, 2606:4700:3037::6815:1950, 104.21.25.80 and 172.67.223.251.
Other host names, for instance charmingtits.com, sea-s.cn, ponaroshku.com, ghabchin.com and wxxlxx.net share IP numbers with 21run.cz.
Two name servers lily.ns.cloudflare.com and merlin.ns.cloudflare.com handle delegation for 21run.cz.
21run.cz uses the same name server setup as other domains, for example aipornteen.com, ejiks.net, keypasco.com, highticketbot.com and adagencysecrets.com.
21run.cz partially shares name servers with other domains; examples include 224999000.com, jasemian.com, planetkuku.com, love52099.com and fpcci.org.pk.
These name servers are commonly used with ian.ns.cloudflare.com, chan.ns.cloudflare.com and jay.ns.cloudflare.com.
Host names with six IP numbers: lily.ns.cloudflare.com points to: 2606:4700:50::adf5:3a82, 2803:f800:50::6ca2:c082, 2a06:98c1:50::ac40:2082, 108.162.192.130, 172.64.32.130 and 173.245.58.130; merlin.ns.cloudflare.com points to: 2606:4700:58::adf5:3bcd, 2803:f800:50::6ca2:c1cd, 2a06:98c1:50::ac40:21cd, 108.162.193.205, 172.64.33.205 and 173.245.59.205.
21run.cz is handled by a single mail server, _dc-mx.9862a5234ade.21run.cz.