21i.dev - dns.ninja
21i.dev
| DNSSEC | ⚠️ Not signed | ||||||
| A | 91.225.28.53🇵🇱 CF-KRK91.225.28.0/23 | ||||||
| PTR | dedyk35.hekko.net.pl | ||||||
| NS | ns1.hekko.net.pl ⭐ | ||||||
| A | 94.152.255.102🇵🇱 OXYLION-AS94.152.255.0/24 | ||||||
| PTR | ns1.hekko.net.pl | ||||||
| NS | ns2.hekko.net.pl | ||||||
| A | 94.152.254.102🇵🇱 OXYLION-AS94.152.254.0/24 | ||||||
| PTR | ns2.hekko.net.pl | ||||||
| MX | mail.21i.dev ⭐ | ||||||
| A | 91.225.28.53🇵🇱 CF-KRK91.225.28.0/23 | ||||||
| PTR | dedyk35.hekko.net.pl | ||||||
| TXT | v=spf1 a mx include:spf.hekko.pl -all | ||||||
| SOA | ns1.hekko.net.plhostmaster@21i.dev 2024-01-22 #1 | ||||||
dev
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns-tld1.charlestonroadregistry.com ⭐ | ||||||
| NS | ns-tld2.charlestonroadregistry.com | ||||||
| NS | ns-tld3.charlestonroadregistry.com | ||||||
| NS | ns-tld4.charlestonroadregistry.com | ||||||
| NS | ns-tld5.charlestonroadregistry.com | ||||||
| SOA | ns-tld1.charlestonroadregistry.comcloud-dns-hostmaster@google.com serial=1 | ||||||
Subdomains
mail.21i.dev |
Same first word
Similar names
DNS History
4 records (4 active, 0 former)
●NSns1.hekko.net.pl2026-02-18 → 2026-08-07 · 2 obs
● 2026-08-07 18:14:08
●NSns2.hekko.net.pl2026-02-18 → 2026-08-07 · 2 obs
● 2026-08-07 18:14:08
●MXmail.21i.dev2026-02-18 → 2026-08-07 · 2 obs
● 2026-08-07 18:14:08
●A91.225.28.532026-02-18 → 2026-08-07 · 2 obs
● 2026-08-07 18:14:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| dev | ns-tld3.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com... | - |
| 21i.dev | ns1.hekko.net.pl, ns2.hekko.net.pl | - |
✅ Authoritative Response
Server:94.152.255.102
NS records: ns1.hekko.net.pl, ns2.hekko.net.pl
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21i.dev (unsigned zone)
⏱️ Timing
Total: 296ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 91.225.28.53 |
| NS | 2 | ns1.hekko.net.pl, ns2.hekko.net.pl |
| MX | 1 | mail.21i.dev (pri: 10) |
| TXT | 1 | v=spf1 a mx include:spf.hekko.pl -all |
| SOA | 1 | ns1.hekko.net.pl hostmaster.21i.dev |
Analysis
Hierarchy
The domain mail.21i.dev falls under the parent 21i.dev.
IP Addresses
21i.dev directs to one IP number, which is 91.225.28.53.
Among the host names that share IP numbers with 21i.dev are mail.likebartsimpson.com, juszczak.com.pl, absl.pl and two others.
Name Servers
The NS records for 21i.dev delegate to ns1.hekko.net.pl and ns2.hekko.net.pl.
21i.dev has the same name server delegation as a number of other domains, such as colorownia.pl, legiarugby.com, ecoclarity.pl and two more.
At least some of 21i.dev's name servers are shared with other domains, for example skylab-serwis.pl, amarok-concept.pl, akademiaprawajazdy.pl and two more.
These name servers are routinely co-deployed with the name servers ns2.cyberfolks.pl, ns1.cyberfolks.pl, ns3.cyberfolks.pl and two others.
Each of ns1.hekko.net.pl and ns2.hekko.net.pl has one IP address: ns1.hekko.net.pl uses 94.152.255.102 and ns2.hekko.net.pl uses 94.152.254.102.
Mail Servers
21i.dev routes its mail through a single mail server, mail.21i.dev.
mail.21i.dev resolves to 91.225.28.53 and no other IP number.