dev-null.cz - dns.ninja
dev-null.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 164.215.117.86🇨🇿 PODA-AS164.215.112.0/20 PODA-NET | ||||||
| PTR | static-2765583702.poda.cz | ||||||
| NS | ns1.ignum.com ⭐ | ||||||
| A | 2a00:1e40:a:53::5🇸🇰 IGNUM-AS2a00:1e40:a::/48 | ||||||
| PTR | ns1-bra.core.webglobe.com | ||||||
| A | 185.65.223.35🇸🇰 IGNUM-AS185.65.223.0/24 | ||||||
| PTR | ns1-bra.core.webglobe.com | ||||||
| NS | ns2.ignum.cz | ||||||
| A | 2001:1ab0:7e1e:2::5🇨🇿 IGNUM-AS2001:1ab0::/32 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/ | ||||||
| PTR | ns2-prg.core.webglobe.com | ||||||
| A | 217.31.48.201🇨🇿 IGNUM-AS217.31.48.0/20 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/ | ||||||
| PTR | ns2-prg.core.webglobe.com | ||||||
| MX | mail.dev-null.cz ⭐ | ||||||
| A | 164.215.117.86🇨🇿 PODA-AS164.215.112.0/20 PODA-NET | ||||||
| PTR | static-2765583702.poda.cz | ||||||
| SOA | ns1.ignum.comhostmaster@ignum.cz 2026-06-24 #1 | ||||||
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=1782631036 | ||||||
Subdomains
mail.dev-null.cz |
Same first word
Similar names
DNS History
8 records (4 active, 4 former)
○NSns.dco.cz2015-06-18 → 2017-10-30 · 4 obs
● 2017-10-30 10:28:04
○ 2026-04-12 07:16:38
○ 2026-06-28 07:23:18
●NSns1.ignum.com2026-04-12 → 2026-06-28 · 3 obs
● 2026-04-12 07:16:38
● 2026-06-28 07:23:18
●NSns2.ignum.cz2026-04-12 → 2026-06-28 · 3 obs
● 2026-04-12 07:16:38
● 2026-06-28 07:23:18
○NSslave.casablanca.cz2015-06-18 → 2017-10-30 · 4 obs
● 2017-10-30 10:28:04
○ 2026-04-12 07:16:38
○ 2026-06-28 07:23:18
●MXmail.dev-null.cz2026-04-12 → 2026-06-28 · 3 obs
● 2026-04-12 07:16:38
● 2026-06-28 07:23:18
○MXsmtp.dev-null.cz2015-06-18 → 2017-10-30 · 4 obs
● 2017-10-30 10:28:04
○ 2026-04-12 07:16:38
○ 2026-06-28 07:23:18
●A164.215.117.862026-04-12 → 2026-06-28 · 3 obs
● 2026-04-12 07:16:38
● 2026-06-28 07:23:18
○A77.95.40.2512015-06-18 → 2017-10-30 · 4 obs
● 2017-10-30 10:28:04
○ 2026-04-12 07:16:38
○ 2026-06-28 07:23:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| dev-null.cz | ns1.ignum.com, ns2.ignum.cz | 2 records |
✅ Authoritative Response
Server:217.31.48.201
NS records: ns1.ignum.com, ns2.ignum.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1695ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 164.215.117.86 |
| NS | 2 | ns2.ignum.cz, ns1.ignum.com |
| MX | 1 | mail.dev-null.cz (pri: 10) |
| SOA | 1 | ns1.ignum.com hostmaster.ignum.cz |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2.ignum.cz, ns2.ignum.cz)
Analysis
Hierarchy
dev-null.cz is a parent domain of mail.dev-null.cz.
IP Addresses
dev-null.cz resolves to just one IP address, 164.215.117.86.
Two other host names, along with www.kotata.net, mail.dev-null.cz and kotata.net, also share IP numbers with dev-null.cz.
Name Servers
The NS records for dev-null.cz delegate to ns1.ignum.com and ns2.ignum.cz.
dev-null.cz shares its NS records with other domains, for example via-idea.eu, arma.cz, kvalitex.cz and two others.
dev-null.cz shares at least some of its name servers with other domains, including kpsag.sk, realitnimakler.cz, spamer.cz and two others.
These name servers are frequently paired with the name servers ns1.ignum.eu, ns2.ignum.eu and ns3.ignum.eu.
ns1.ignum.com resolves to 185.65.223.35 and 2a00:1e40:a:53::5. Likewise, ns2.ignum.cz resolves to 217.31.48.201 and 2001:1ab0:7e1e:2::5 — two IP addresses apiece.
Mail Servers
The sole mail server for dev-null.cz is mail.dev-null.cz.
mail.dev-null.cz resolves to 164.215.117.86 and no other IP number.