`sharkcourses.com`

DNSSEC	⚠️ Not signed
A	146.103.45.1^{🇧🇪 CDNEXT146.103.45.0/24}
		PTR	`cp8.sgp1.ultacp.com`
NS	`ns1.ultahost.com` ⭐
		A	167.71.73.238^{🇳🇱 DIGITALOCEAN167.71.64.0/20 DigitalOcean}
			PTR	`ns1.ultahost.com`
NS	`ns2.ultahost.com`
		A	2001:41d0:701:1100::7e5^{🇩🇪 OVH2001:41d0::/32 IPv6}
			PTR	`ns2.ultahost.com`
		A	51.38.114.43^{🇫🇷 OVH51.38.0.0/16}
			PTR	`ns2.ultahost.com`
NS	`ns3.ultahost.com`
		A	2a01:4f8:c0c:79ee::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`ns4.ultahost.com`
		A	94.130.75.18^{🇩🇪 Hetzner94.130.0.0/16 HETZNER-DC}
			PTR	`ns4.ultahost.com`
NS	`ns4.ultahost.com`
		A	2001:19f0:6402:4de:5400:2ff:fe93:34e8^{🇺🇸 AS-VULTR2001:19f0:6400::/38 Vultr Assigned Prefix}
		A	149.28.254.81^{🇺🇸 AS-VULTR149.28.240.0/20 Vultr Assigned Prefix}
			PTR	`ns4.ultahost.com`
MX	`mail.sharkcourses.com` ⭐
MX	`sharkcourses.com`⁽¹⁵⁾
		A	146.103.45.1^{🇧🇪 CDNEXT146.103.45.0/24}
			PTR	`cp8.sgp1.ultacp.com`
TXT	`v=spf1 a mx ip4: ~all`
TXT	`google-site-verification=Xw_N6ah-m2OQqDuRLGDLnMe0S-3Wayxai0qL7ydOMV8`
SOA	`ns1.ultahost.com`hostmaster@ultahost.com 2025-06-07 #1

`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.net`nstld@verisign-grs.com serial=1774505977

MX for

sharkcourses.com

Same first word

sharkcourses.com

DNS History

12 records (7 active, 5 former)

●NSns1.ultahost.com2026-02-20 → 2026-03-26 · 3 obs

○ 2018-08-09 22:04:18
● 2026-02-20 12:18:36
● 2026-03-26 06:25:52

○NSns11.domaincontrol.com2016-12-21 → 2016-12-21 · 3 obs

● 2016-12-21 01:05:28
○ 2018-08-09 22:04:18
○ 2026-03-26 06:25:52

○NSns12.domaincontrol.com2016-12-21 → 2016-12-21 · 3 obs

● 2016-12-21 01:05:28
○ 2018-08-09 22:04:18
○ 2026-03-26 06:25:52

●NSns2.ultahost.com2026-02-20 → 2026-03-26 · 3 obs

○ 2018-08-09 22:04:18
● 2026-02-20 12:18:36
● 2026-03-26 06:25:52

●NSns3.ultahost.com2026-02-20 → 2026-03-26 · 3 obs

○ 2018-08-09 22:04:18
● 2026-02-20 12:18:36
● 2026-03-26 06:25:52

●NSns4.ultahost.com2026-02-20 → 2026-03-26 · 3 obs

○ 2018-08-09 22:04:18
● 2026-02-20 12:18:36
● 2026-03-26 06:25:52

●MXmail.sharkcourses.com2026-02-20 → 2026-03-26 · 3 obs

○ 2018-08-09 22:04:18
● 2026-02-20 12:18:36
● 2026-03-26 06:25:52

○MXmailstore1.secureserver.net2016-12-21 → 2016-12-21 · 3 obs

● 2016-12-21 01:05:28
○ 2018-08-09 22:04:18
○ 2026-03-26 06:25:52

●MXsharkcourses.com2026-02-20 → 2026-03-26 · 3 obs

○ 2018-08-09 22:04:18
● 2026-02-20 12:18:36
● 2026-03-26 06:25:52

○MXsmtp.secureserver.net2016-12-21 → 2016-12-21 · 3 obs

● 2016-12-21 01:05:28
○ 2018-08-09 22:04:18
○ 2026-03-26 06:25:52

●A146.103.45.12026-02-20 → 2026-03-26 · 3 obs

○ 2018-08-09 22:04:18
● 2026-02-20 12:18:36
● 2026-03-26 06:25:52

○A184.168.221.332016-12-21 → 2016-12-21 · 3 obs

● 2016-12-21 01:05:28
○ 2018-08-09 22:04:18
○ 2026-03-26 06:25:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
sharkcourses.com	ns1.ultahost.com, ns2.ultahost.com, ns3.ultahost.com, ns4.ultahost.com	4 records

✅ Authoritative Response

Server:51.38.114.43

NS records: ns1.ultahost.com, ns2.ultahost.com, ns3.ultahost.com, ns4.ultahost.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sharkcourses.com (unsigned zone)

⏱️ Timing

Total: 3292ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`146.103.45.1`
NS	4	`ns3.ultahost.com, ns4.ultahost.com...`
MX	2	`mail.sharkcourses.com (pri: 10), sharkcourses.com (pri: 15)`
TXT	2	`v=spf1 a mx ip4: ~all, google-site-verification=Xw_N6ah-m2OQqDu`
SOA	1	`ns1.ultahost.com hostmaster.ultahost.com`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns1.ultahost.com, ns2.ultahost.com, ns3.ultahost.com...)

Analysis

Mail Server Role

sharkcourses.com serves as the mail server for sharkcourses.com.

mail.sharkcourses.com often serves as a mail server in conjunction with sharkcourses.com.

IP Addresses

sharkcourses.com points to IP number: 146.103.45.1.

Other host names such as saveourship.org.uk, mulus138.co, mail.raisd.co, www.fashionburner.com and _dc-mx.da6c7de7b544.nonton.click share IPs with sharkcourses.com.

Name Servers

sharkcourses.com is delegated to four name servers: ns1.ultahost.com, ns2.ultahost.com, ns3.ultahost.com and ns4.ultahost.com.

sharkcourses.com at least partially shares name servers with other domains, for instance pikashow.ltd, tainiomania.org, calverantis.com, soccerstreams100.sbs and mimetek.com.

Two IPs per host:

ns2.ultahost.com points to 2001:41d0:701:1100::7e5 and 51.38.114.43

ns3.ultahost.com points to 2a01:4f8:c0c:79ee::1 and 94.130.75.18

ns4.ultahost.com points to 2001:19f0:6402:4de:5400:2ff:fe93:34e8 and 149.28.254.81

One IP per host:

ns1.ultahost.com points to 167.71.73.238

Mail Servers

Two mail servers handle sharkcourses.com: sharkcourses.com and mail.sharkcourses.com.

Host names with a single IP: sharkcourses.com points to 146.103.45.1.

sharkcourses.com - robtex.com