mastering.com - dns.ninja
mastering.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=1783452986 | ||||||
rank #141373 in the tld
WOT: SAFE (87/100)
📈 Tranco rank: #588,797
Subdomains
courses.mastering.com |
Same first word
Similar names
DNS History
19 records (13 active, 6 former)
○NSbuy.internettraffic.com2015-08-19 → 2016-04-21 · 4 obs
● 2016-04-21 02:05:20
○ 2017-01-01 17:44:22
○ 2026-07-07 19:48:10
●NSgina.ns.cloudflare.com2026-02-16 → 2026-07-07 · 3 obs
● 2026-02-16 12:15:48
● 2026-07-07 19:48:10
○NSns1.uniregistrymarket.link2017-01-01 → 2017-12-28 · 5 obs
● 2017-01-01 17:44:22
● 2017-12-28 10:12:16
○ 2026-02-16 12:15:48
○ 2026-07-07 19:48:10
○NSns2.uniregistrymarket.link2017-01-01 → 2017-12-28 · 5 obs
● 2017-01-01 17:44:22
● 2017-12-28 10:12:16
○ 2026-02-16 12:15:48
○ 2026-07-07 19:48:10
○NSsell.internettraffic.com2015-08-19 → 2016-04-21 · 4 obs
● 2016-04-21 02:05:20
○ 2017-01-01 17:44:22
○ 2026-07-07 19:48:10
●NSyichun.ns.cloudflare.com2026-02-16 → 2026-07-07 · 3 obs
● 2026-02-16 12:15:48
● 2026-07-07 19:48:10
●MXalt1.aspmx.l.google.com2026-02-16 → 2026-07-07 · 2 obs
● 2026-07-07 19:48:10
●MXalt2.aspmx.l.google.com2026-02-16 → 2026-07-07 · 2 obs
● 2026-07-07 19:48:10
●MXalt3.aspmx.l.google.com2026-02-16 → 2026-07-07 · 2 obs
● 2026-07-07 19:48:10
●MXalt4.aspmx.l.google.com2026-02-16 → 2026-07-07 · 2 obs
● 2026-07-07 19:48:10
●MXaspmx.l.google.com2026-02-16 → 2026-07-07 · 2 obs
● 2026-07-07 19:48:10
●A104.26.10.2392026-02-16 → 2026-07-07 · 3 obs
● 2026-02-16 12:15:48
● 2026-07-07 19:48:10
●A104.26.11.2392026-02-16 → 2026-07-07 · 3 obs
● 2026-02-16 12:15:48
● 2026-07-07 19:48:10
●A172.67.73.892026-02-16 → 2026-07-07 · 3 obs
● 2026-02-16 12:15:48
● 2026-07-07 19:48:10
●A2606:4700:20::681a:aef2026-02-16 → 2026-07-07 · 3 obs
● 2026-02-16 12:15:48
● 2026-07-07 19:48:10
●A2606:4700:20::681a:bef2026-02-16 → 2026-07-07 · 3 obs
● 2026-02-16 12:15:48
● 2026-07-07 19:48:10
●A2606:4700:20::ac43:49592026-02-16 → 2026-07-07 · 3 obs
● 2026-02-16 12:15:48
● 2026-07-07 19:48:10
○A69.172.201.1532016-04-21 → 2017-12-28 · 5 obs
● 2016-04-21 02:05:20
● 2017-12-28 10:12:16
○ 2026-02-16 12:15:48
○ 2026-07-07 19:48:10
○A69.172.201.2082015-08-19 → 2016-01-18 · 4 obs
● 2016-01-18 23:31:38
○ 2016-04-21 02:05:20
○ 2026-07-07 19:48:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | i.gtld-servers.net, e.gtld-servers.net, a.gtld-servers.net, g.gtld-servers.net... | - |
| mastering.com | gina.ns.cloudflare.com, yichun.ns.cloudflare.com | 12 records |
✅ Authoritative Response
Server:108.162.193.248
NS records: gina.ns.cloudflare.com, yichun.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for mastering.com (unsigned zone)
⏱️ Timing
Total: 541ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 3 | 104.26.11.239, 104.26.10.239... |
| AAAA | 3 | 2606:4700:20::681a:aef, 2606:4700:20::ac43:4959... |
| NS | 2 | gina.ns.cloudflare.com, yichun.ns.cloudflare.com |
| MX | 5 | aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)... |
| TXT | 6 | clickfunnels-domain-verification=eWgQze, facebook-domain-verification=jhr3cdiy2hj... |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h2"] |
| SOA | 1 | gina.ns.cloudflare.com dns.cloudflare.co |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (gina.ns.cloudflare.com, gina.ns.cloudflare.com, gina.ns.cloudflare.com...)
Analysis
Hierarchy
mastering.com serves as the parent of courses.mastering.com.
IP Addresses
mastering.com points to 6 IP addresses, including 104.26.10.239, 104.26.11.239 and 172.67.73.89, plus 3 other.
m.casinomagiconline.bet.ar, pjm.co.at, cattlefax.com plus two other host names have IP numbers in common with mastering.com.
Name Servers
mastering.com is served by two delegated name servers, gina.ns.cloudflare.com and yichun.ns.cloudflare.com.
The name server configuration of mastering.com is shared with other domains, for instance tripper.guide, getstring3.com, importantquote.com and two others.
mastering.com has at least partial name server overlap with other domains, such as copy202601.com, astro-spark.com, bluedisc.com and two others.
It is common to find these name servers paired with the name servers pablo.ns.cloudflare.com, betty.ns.cloudflare.com, dana.ns.cloudflare.com and dave.ns.cloudflare.com.
Hosts with 6 IP addresses each:
gina.ns.cloudflare.com carries IP addresses 108.162.192.117, 172.64.32.117 and 173.245.58.117, with 3 other addresses beyond those.
yichun.ns.cloudflare.com carries IP addresses 108.162.193.248, 172.64.33.248 and 173.245.59.248, with 3 other addresses beyond those.
Mail Servers
Mail for mastering.com is handled by five mail servers, namely aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.
At least some of the mail servers used by mastering.com are shared with other domains: realeld.com, dratas.lt, genohub.com and two others among them.
These mail servers often appear in conjunction with the mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and aspmx3.googlemail.com.
Host names pointing to two IP addresses:
aspmx.l.google.com maps to two IP addresses — 192.178.155.26 and 2607:f8b0:4004:c1f::1b.
alt1.aspmx.l.google.com maps to two IP addresses — 108.177.123.26 and 2800:3f0:4003:c0f::1b.
alt2.aspmx.l.google.com maps to two IP addresses — 172.253.116.26 and 2a00:1450:400b:c02::1a.
alt3.aspmx.l.google.com maps to two IP addresses — 192.178.223.26 and 2a00:1450:4009:c0f::1a.
alt4.aspmx.l.google.com maps to two IP addresses — 172.253.157.27 and 2a00:1450:400c:c23::1b.