masterclasses.us - robtex.com

masterclasses.us

DNSSEC⚠️ Not signed
A3.33.130.190🇺🇸 Amazon3.33.128.0/20
PTRa2aa9ff50de748dbe.awsglobalaccelerator.com
A15.197.148.33🇺🇸 Amazon15.197.144.0/20
NSns73.domaincontrol.com ⭐
A2603:5:21a4::2f🇺🇸 GODADDY-DNS2603:5:21a0::/44
PTRns73.domaincontrol.com
A97.74.106.47🇺🇸 GODADDY-DNS97.74.106.0/23
PTRns73.domaincontrol.com
NSns74.domaincontrol.com
A2603:5:22a4::2f🇺🇸 GODADDY-DNS2603:5:22a0::/44
PTRns74.domaincontrol.com
A173.201.74.47🇺🇸 GODADDY-DNS173.201.74.0/23
PTRns74.domaincontrol.com
SOAns73.domaincontrol.comdns@jomax.net 2024-07-11 #1

us

DNSSEC🔒 Signed (DS record present)
NSa.cctld.us ⭐
NSb.cctld.us
NSf.cctld.us
NSk.cctld.us
NSm.cctld.us
NSn.cctld.us
NSw.cctld.us
NSx.cctld.us
NSy.cctld.us
SOAa.cctld.usadmin@tldns.godaddy serial=1778417506

Same first word

masterclasses.us
masterclasses.net
masterclasses.de
masterclasses.org.il
masterclasses.eu
masterclasses.ca
masterclasses.org
masterclasses.fr

Similar names

classesmaster.com
semasterclass.com

DNS History

20 records (4 active, 16 former)

2017201820192020202120222023202420252026NSns73.domaincontrol.comns74.domaincontrol.comart.ns.cloudflare.comlara.ns.cloudflare.comns29.domaincontrol.comns30.domaincontrol.comMXeforward1.registrar-servers.comeforward2.registrar-servers.comeforward3.registrar-servers.comeforward4.registrar-servers.comeforward5.registrar-servers.commailstore1.secureserver.netsmtp.secureserver.netA15.197.148.333.33.130.190104.24.108.100104.24.109.100184.168.221.642400:cb00:2048:1::6818:6c642400:cb00:2048:1::6818:6d64
○NSart.ns.cloudflare.com2017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
○NSlara.ns.cloudflare.com2017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
○NSns29.domaincontrol.com2016-03-02 → 2016-06-20 · 4 obs
● 2016-03-02 04:56:04
● 2016-06-20 21:33:16
○ 2017-02-10 05:28:00
○ 2026-05-10 13:19:32
○NSns30.domaincontrol.com2016-03-02 → 2016-06-20 · 4 obs
● 2016-03-02 04:56:04
● 2016-06-20 21:33:16
○ 2017-02-10 05:28:00
○ 2026-05-10 13:19:32
●NSns73.domaincontrol.com2026-03-20 → 2026-05-10 · 3 obs
○ 2020-02-07 21:04:26
● 2026-03-20 14:13:58
● 2026-05-10 13:19:32
●NSns74.domaincontrol.com2026-03-20 → 2026-05-10 · 3 obs
○ 2020-02-07 21:04:26
● 2026-03-20 14:13:58
● 2026-05-10 13:19:32
○MXeforward1.registrar-servers.com2017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
○MXeforward2.registrar-servers.com2017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
○MXeforward3.registrar-servers.com2017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
○MXeforward4.registrar-servers.com2017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
○MXeforward5.registrar-servers.com2017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
○MXmailstore1.secureserver.net2016-03-02 → 2016-06-20 · 4 obs
● 2016-03-02 04:56:04
● 2016-06-20 21:33:16
○ 2017-02-10 05:28:00
○ 2026-05-10 13:19:32
○MXsmtp.secureserver.net2016-03-02 → 2016-06-20 · 4 obs
● 2016-03-02 04:56:04
● 2016-06-20 21:33:16
○ 2017-02-10 05:28:00
○ 2026-05-10 13:19:32
○A104.24.108.1002017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
○A104.24.109.1002017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
●A15.197.148.332026-03-20 → 2026-05-10 · 3 obs
○ 2020-02-07 21:04:26
● 2026-03-20 14:13:58
● 2026-05-10 13:19:32
○A184.168.221.642016-03-02 → 2016-06-20 · 4 obs
● 2016-03-02 04:56:04
● 2016-06-20 21:33:16
○ 2017-02-10 05:28:00
○ 2026-05-10 13:19:32
○A2400:cb00:2048:1::6818:6c642017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
○A2400:cb00:2048:1::6818:6d642017-02-10 → 2017-02-10 · 4 obs
○ 2016-06-20 21:33:16
● 2017-02-10 05:28:00
○ 2020-02-07 21:04:26
○ 2026-05-10 13:19:32
●A3.33.130.1902026-03-20 → 2026-05-10 · 3 obs
○ 2020-02-07 21:04:26
● 2026-03-20 14:13:58
● 2026-05-10 13:19:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
usm.cctld.us, k.cctld.us, b.cctld.us, x.cctld.us...-
masterclasses.usns74.domaincontrol.com, ns73.domaincontrol.com-

✅ Authoritative Response

Server:97.74.106.47

NS records: ns74.domaincontrol.com, ns73.domaincontrol.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for masterclasses.us (unsigned zone)

⏱️ Timing

Total: 617ms | Queries: -

📄 Records

TypeCountSample Data
A23.33.130.190, 15.197.148.33
NS2ns73.domaincontrol.com, ns74.domaincontrol.com
SOA1ns73.domaincontrol.com dns.jomax.net

Analysis

IP Addresses

masterclasses.us points to two IP numbers: 3.33.130.190 and 15.197.148.33.

Other host names, for instance xanderseldomridge.mobi, tasopetridis.com, thelearningexperience.co, organicpetcare.info and ohanawellnessandspa.com share IP numbers with masterclasses.us.

Name Servers

masterclasses.us's delegation is to two name servers ns73.domaincontrol.com and ns74.domaincontrol.com.

masterclasses.us shares the same name server configuration as other domains, such as scholarandgent.com, transkapital.com, bethacherry.net, austinnaturalfertility.com and gilbertdlg.com.

Host names with two IP numbers: ns73.domaincontrol.com points to 2603:5:21a4::2f and 97.74.106.47; ns74.domaincontrol.com points to 2603:5:22a4::2f and 173.201.74.47