21math.com - dns.ninja
21math.com
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=1782701380 | ||||||
Same first word
21math.com |
Similar names
DNS History
13 records (8 active, 5 former)
●NSdns1.registrar-servers.com2026-03-26 → 2026-06-29 · 3 obs
● 2026-03-26 02:54:24
● 2026-06-29 02:51:54
●NSdns2.registrar-servers.com2026-03-26 → 2026-06-29 · 3 obs
● 2026-03-26 02:54:24
● 2026-06-29 02:51:54
○NSns1.dominios.uol.com.br2015-08-23 → 2017-03-29 · 4 obs
● 2017-03-29 16:17:30
○ 2026-03-26 02:54:24
○ 2026-06-29 02:51:54
○NSns2.dominios.uol.com.br2015-08-23 → 2017-03-29 · 4 obs
● 2017-03-29 16:17:30
○ 2026-03-26 02:54:24
○ 2026-06-29 02:51:54
○NSns3.dominios.uol.com.br2015-08-23 → 2017-03-29 · 4 obs
● 2017-03-29 16:17:30
○ 2026-03-26 02:54:24
○ 2026-06-29 02:51:54
●MXeforward1.registrar-servers.com2026-03-26 → 2026-06-29 · 3 obs
● 2026-03-26 02:54:24
● 2026-06-29 02:51:54
●MXeforward2.registrar-servers.com2026-03-26 → 2026-06-29 · 3 obs
● 2026-03-26 02:54:24
● 2026-06-29 02:51:54
●MXeforward3.registrar-servers.com2026-03-26 → 2026-06-29 · 3 obs
● 2026-03-26 02:54:24
● 2026-06-29 02:51:54
●MXeforward4.registrar-servers.com2026-03-26 → 2026-06-29 · 3 obs
● 2026-03-26 02:54:24
● 2026-06-29 02:51:54
●MXeforward5.registrar-servers.com2026-03-26 → 2026-06-29 · 3 obs
● 2026-03-26 02:54:24
● 2026-06-29 02:51:54
○MXmx.uhserver.com2015-08-23 → 2017-03-29 · 4 obs
● 2017-03-29 16:17:30
○ 2026-03-26 02:54:24
○ 2026-06-29 02:51:54
●A162.255.119.1142026-03-26 → 2026-06-29 · 3 obs
● 2026-03-26 02:54:24
● 2026-06-29 02:51:54
○A200.98.247.402015-08-23 → 2017-03-29 · 4 obs
● 2017-03-29 16:17:30
○ 2026-03-26 02:54:24
○ 2026-06-29 02:51:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | c.gtld-servers.net, b.gtld-servers.net, h.gtld-servers.net, l.gtld-servers.net... | - |
| 21math.com | dns1.registrar-servers.com, dns2.registrar-servers.com | 4 records |
✅ Authoritative Response
Server:156.154.133.200
NS records: dns1.registrar-servers.com, dns2.registrar-servers.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21math.com (unsigned zone)
⏱️ Timing
Total: 207ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 162.255.119.114 |
| NS | 2 | dns1.registrar-servers.com, dns2.registrar-servers.com |
| MX | 5 | eforward1.registrar-servers.com (pri: 10, eforward2.registrar-servers.com (pri: 10... |
| TXT | 2 | v=spf1 include:spf.efwd.registrar-server, google-site-verification=usjxKsfXr43NYRH |
| SOA | 1 | dns1.registrar-servers.com hostmaster.re |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (dns1.registrar-servers.com, dns1.registrar-servers.com, dns2.registrar-servers.com...)
Analysis
IP Addresses
21math.com directs to one IP number, which is 162.255.119.114.
Among the host names that share IP numbers with 21math.com are springboardmail.com, packlist.co, myhairbear.com and two others.
Name Servers
21math.com is served by two delegated name servers, dns1.registrar-servers.com and dns2.registrar-servers.com.
21math.com has the same name server delegation as a number of other domains, such as tactools.org, contentrender.com, 2010score.com and two more.
The DNS delegation for 21math.com at least partly coincides with that of other domains, jbwhip.com being one example.
Each of the two host names carries two IP addresses: dns1.registrar-servers.com points to 156.154.132.200 and 2610:a1:1024::200, and dns2.registrar-servers.com points to 156.154.133.200 and 2610:a1:1025::200.
Mail Servers
Five mail servers handle 21math.com: eforward1.registrar-servers.com, eforward2.registrar-servers.com, eforward3.registrar-servers.com and two others.
21math.com shares at least some of its mail servers with other domains — for example greendiscoveryhub.com, jynlwekq.com, angibu.com and two more.
It is common for these mail servers to co-occur with eforward4.registrar-servers.com, eforward5.registrar-servers.com, eforward6.registrar-servers.com and eforward7.registrar-servers.com as mail servers.
Hosts that resolve to one IP address:
eforward1.registrar-servers.com points to the IP address 162.255.118.51.
eforward2.registrar-servers.com points to the IP address 162.255.118.52.
eforward3.registrar-servers.com points to the IP address 162.255.118.51.
eforward4.registrar-servers.com points to the IP address 162.255.118.52.
eforward5.registrar-servers.com points to the IP address 162.255.118.51.
eforward1.registrar-servers.com, eforward3.registrar-servers.com and eforward5.registrar-servers.com all direct to 162.255.118.51.
These two host names — eforward2.registrar-servers.com and eforward4.registrar-servers.com — each point to 162.255.118.52 IP addresses.