21mar.com - dns.ninja
21mar.com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 37.9.175.211🇸🇰 WEBSUPPORT-SRO-SK-AS37.9.175.0/24 | ||||||
| PTR | ing.r4.websupport.cz | ||||||
| NS | ns1.websupport.cz ⭐ | ||||||
| A | 2a10:bbc0::11🇨🇿 ACTIVE24-AS2a10:bbc0::/32 | ||||||
| PTR | ns1.websupport.eu | ||||||
| A | 45.10.97.11🇨🇿 ACTIVE24-AS45.10.97.0/24 | ||||||
| PTR | ns1.websupport.eu | ||||||
| NS | ns2.websupport.cz | ||||||
| A | 2a02:250:3::12🇸🇪 ACTIVE24-AS2a02:250:3::/48 | ||||||
| PTR | ns2.websupport.eu | ||||||
| A | 185.71.159.12🇸🇪 ACTIVE24-AS185.71.159.0/24 | ||||||
| PTR | ns2.websupport.eu | ||||||
| NS | ns3.websupport.eu | ||||||
| A | 2a10:bbc0::13🇨🇿 ACTIVE24-AS2a10:bbc0::/32 | ||||||
| PTR | ns3.websupport.eu | ||||||
| A | 45.10.97.13🇨🇿 ACTIVE24-AS45.10.97.0/24 | ||||||
| PTR | ns3.websupport.eu | ||||||
| SOA | ns1.websupport.czadmin@websupport.cz serial=1755594463 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1786596549 | ||||||
Previously MX for
21mar.com |
Same first word
21mar.com |
Similar names
DNS History
11 records (4 active, 7 former)
○NSns-eu09.mithrilnetwork.com2017-03-14 → 2017-03-14 · 4 obs
● 2017-03-14 03:24:12
○ 2026-04-14 06:15:48
○ 2026-08-13 04:50:12
○NSns-eu10.mithrilnetwork.com2017-03-14 → 2017-03-14 · 4 obs
● 2017-03-14 03:24:12
○ 2026-04-14 06:15:48
○ 2026-08-13 04:50:12
○NSns1.21mar.com2015-12-13 → 2016-07-06 · 4 obs
● 2016-07-06 22:40:06
○ 2017-03-14 03:24:12
○ 2026-08-13 04:50:12
●NSns1.websupport.cz2026-04-14 → 2026-08-13 · 3 obs
● 2026-04-14 06:15:48
● 2026-08-13 04:50:12
○NSns2.21mar.com2015-12-13 → 2016-07-06 · 4 obs
● 2016-07-06 22:40:06
○ 2017-03-14 03:24:12
○ 2026-08-13 04:50:12
●NSns2.websupport.cz2026-04-14 → 2026-08-13 · 3 obs
● 2026-04-14 06:15:48
● 2026-08-13 04:50:12
●NSns3.websupport.eu2026-04-14 → 2026-08-13 · 3 obs
● 2026-04-14 06:15:48
● 2026-08-13 04:50:12
○MX21mar.com2015-12-13 → 2017-03-14 · 4 obs
● 2017-03-14 03:24:12
○ 2026-04-14 06:15:48
○ 2026-08-13 04:50:12
○A173.199.167.1802015-12-13 → 2016-07-06 · 4 obs
● 2016-07-06 22:40:06
○ 2017-03-14 03:24:12
○ 2026-08-13 04:50:12
○A212.18.235.692017-03-14 → 2017-03-14 · 4 obs
● 2017-03-14 03:24:12
○ 2026-04-14 06:15:48
○ 2026-08-13 04:50:12
●A37.9.175.2112026-04-14 → 2026-08-13 · 3 obs
● 2026-04-14 06:15:48
● 2026-08-13 04:50:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, d.gtld-servers.net, f.gtld-servers.net... | - |
| 21mar.com | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:45.10.97.13
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: 341ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 37.9.175.211 |
| NS | 3 | ns1.websupport.cz, ns2.websupport.cz... |
| SOA | 1 | ns1.websupport.cz admin.websupport.cz |
Analysis
IP Addresses
21mar.com resolves to just one IP address, 37.9.175.211.
Two other host names, along with 21-stoleti.cz, pensionalba.eu and smartinvestsolution.com, also share IP numbers with 21mar.com.
Name Servers
The authoritative name servers for 21mar.com are ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu — three in total.
There is at least partial name server overlap between 21mar.com and other domains — cssi-cr.cz, krmivahulin.cz, ciphercad.com and two more among them.
The name servers ns1.websupport.sk, ns2.websupport.sk and ns3.websupport.sk are often found in combination with these name servers.
ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu all resolve to exactly two IP numbers apiece: ns1.websupport.cz → 45.10.97.11 and 2a10:bbc0::11; ns2.websupport.cz → 185.71.159.12 and 2a02:250:3::12; ns3.websupport.eu → 45.10.97.13 and 2a10:bbc0::13.