dotnetmastery.com - dns.ninja

`dotnetmastery.com`

DNSSEC	⚠️ Not signed
A	20.118.48.3^{🇺🇸 Microsoft20.64.0.0/10}
NS	`ns1.site4now.net` ⭐
		A	70.39.73.45^{🇺🇸 SHARKTECH-170.39.73.0/24 PNAP-CHG FDCS Route}
			PTR	`jbe4j12sz.rollforsurprise.com`
		A	204.188.197.84^{🇺🇸 SHARKTECH-1204.188.192.0/18 Sharktech Inc.}
		A	204.188.197.246^{🇺🇸 SHARKTECH-1204.188.192.0/18 Sharktech Inc.}
			PTR	`ns1.accessrgn.net`
NS	`ns2.site4now.net`
		A	45.58.159.232^{🇳🇱 SHARKTECH-145.58.159.0/24}
			PTR	`customer.sharktech.net`
		A	45.58.159.233^{🇳🇱 SHARKTECH-145.58.159.0/24}
			PTR	`customer.sharktech.net`
		A	208.98.36.41^{🇺🇸 SHARKTECH-1208.98.36.0/24}
NS	`ns3.site4now.net`
		A	45.58.159.230^{🇳🇱 SHARKTECH-145.58.159.0/24}
			PTR	`customer.sharktech.net`
		A	45.58.159.231^{🇳🇱 SHARKTECH-145.58.159.0/24}
			PTR	`customer.sharktech.net`
		A	208.98.36.42^{🇺🇸 SHARKTECH-1208.98.36.0/24}
MX	`mx01.mail.icloud.com` ⭐
		A	17.42.251.62^{🇺🇸 Apple17.42.0.0/16}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
			PTR	`mx3.mail.icloud.com`
		A	17.56.9.31^{🇺🇸 Apple17.56.9.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.152.5^{🇺🇸 Apple17.57.152.0/23}
			PTR	`ic4-privaterelay.appleid.com`
			PTR	`smtp1.ic4-privaterelay.appleid.com`
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.154.33^{🇺🇸 Apple17.57.154.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.155.25^{🇺🇸 Apple17.57.155.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.156.30^{🇺🇸 Apple17.57.156.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
MX	`mx02.mail.icloud.com` ⭐
		A	17.42.251.62^{🇺🇸 Apple17.42.0.0/16}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
			PTR	`mx3.mail.icloud.com`
		A	17.56.9.31^{🇺🇸 Apple17.56.9.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.152.5^{🇺🇸 Apple17.57.152.0/23}
			PTR	`ic4-privaterelay.appleid.com`
			PTR	`smtp1.ic4-privaterelay.appleid.com`
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.154.33^{🇺🇸 Apple17.57.154.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.155.25^{🇺🇸 Apple17.57.155.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.156.30^{🇺🇸 Apple17.57.156.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
TXT	`apple-domain=b9Scrt8x6G4dtoSy`
TXT	`v=spf1 include:icloud.com ~all`
TXT	`v=spf1 include:spf.mailjet.com ~all`
TXT	`MS=ms31933999`
SOA	`ns1.site4now.net`hostmaster@mywindowshosting.com 2025-10-30 #7

`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=1786435609

Same first word

dotnetmastery.com

DNS History

12 records (6 active, 6 former)

●NSns1.site4now.net2026-03-21 → 2026-08-11 · 3 obs

○ 2017-06-09 13:21:00
● 2026-03-21 15:23:38
● 2026-08-11 08:25:48

●NSns2.site4now.net2026-03-21 → 2026-08-11 · 3 obs

○ 2017-06-09 13:21:00
● 2026-03-21 15:23:38
● 2026-08-11 08:25:48

●NSns3.site4now.net2026-03-21 → 2026-08-11 · 3 obs

○ 2017-06-09 13:21:00
● 2026-03-21 15:23:38
● 2026-08-11 08:25:48

○NSns51.1and1.com2008-03-14 → 2017-06-09 · 4 obs

● 2008-03-14 02:04:10
● 2017-06-09 13:21:00
○ 2026-03-21 15:23:38
○ 2026-08-11 08:25:48

○NSns52.1and1.com2008-03-14 → 2017-06-09 · 4 obs

● 2008-03-14 02:04:10
● 2017-06-09 13:21:00
○ 2026-03-21 15:23:38
○ 2026-08-11 08:25:48

○MXmx00.1and1.com2008-03-14 → 2017-06-09 · 4 obs

● 2008-03-14 02:04:10
● 2017-06-09 13:21:00
○ 2026-03-21 15:23:38
○ 2026-08-11 08:25:48

○MXmx01.1and1.com2008-03-14 → 2017-06-09 · 4 obs

● 2008-03-14 02:04:10
● 2017-06-09 13:21:00
○ 2026-03-21 15:23:38
○ 2026-08-11 08:25:48

●MXmx01.mail.icloud.com2026-03-21 → 2026-08-11 · 3 obs

○ 2017-06-09 13:21:00
● 2026-03-21 15:23:38
● 2026-08-11 08:25:48

●MXmx02.mail.icloud.com2026-03-21 → 2026-08-11 · 3 obs

○ 2017-06-09 13:21:00
● 2026-03-21 15:23:38
● 2026-08-11 08:25:48

●A20.118.48.32026-03-21 → 2026-08-11 · 3 obs

○ 2017-06-09 13:21:00
● 2026-03-21 15:23:38
● 2026-08-11 08:25:48

○A216.250.121.22016-09-27 → 2017-06-09 · 5 obs

○ 2016-04-13 22:24:28
● 2016-09-27 02:50:26
● 2017-06-09 13:21:00
○ 2026-03-21 15:23:38
○ 2026-08-11 08:25:48

○A74.208.29.702008-03-14 → 2016-04-13 · 4 obs

● 2008-03-14 02:04:10
● 2016-04-13 22:24:28
○ 2016-09-27 02:50:26
○ 2026-08-11 08:25:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
dotnetmastery.com	ns1.site4now.net, ns2.site4now.net, ns3.site4now.net	-

✅ Authoritative Response

Server:208.98.36.42

NS records: ns1.site4now.net, ns2.site4now.net, ns3.site4now.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for dotnetmastery.com (unsigned zone)

⏱️ Timing

Total: 531ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`20.118.48.3`
NS	3	`ns1.site4now.net, ns2.site4now.net...`
MX	2	`mx02.mail.icloud.com (pri: 10), mx01.mail.icloud.com (pri: 10)`
TXT	4	`apple-domain=b9Scrt8x6G4dtoSy, v=spf1 include:icloud.com ~all...`
SOA	1	`ns1.site4now.net hostmaster.mywindowshos`

Analysis

IP Addresses

dotnetmastery.com resolves to just one IP address, 20.118.48.3.

Two other host names, along with elimarsystems.com, fiberonascendant.com and encina.org, also share IP numbers with dotnetmastery.com.

Name Servers

dotnetmastery.com carries NS records delegating to ns1.site4now.net, ns2.site4now.net and ns3.site4now.net.

There is at least partial name server overlap between dotnetmastery.com and other domains — alfoadia.com.sa, siminat.com, shilla.club and two more among them.

ns1.site4now.net, ns2.site4now.net and ns3.site4now.net all point to three IP numbers each: ns1.site4now.net resolves to 70.39.73.45, 204.188.197.84 and 204.188.197.246; ns2.site4now.net resolves to 45.58.159.232, 45.58.159.233 and 208.98.36.41; ns3.site4now.net resolves to 45.58.159.230, 45.58.159.231 and 208.98.36.42.

Mail Servers

dotnetmastery.com is served by two mail servers, mx01.mail.icloud.com and mx02.mail.icloud.com.

Among the domains sharing a mail server setup with dotnetmastery.com are teamkennedy.net, hansras.com, kopalsky.com and two others.

dotnetmastery.com and other domains — firma12.com for instance — share at least some mail servers.

DNS names with 6 IP addresses:

mx01.mail.icloud.com resolves to 17.42.251.62, 17.56.9.31 and 17.57.152.5 among others, with 3 other IP addresses in total.

mx02.mail.icloud.com resolves to 17.42.251.62, 17.56.9.31 and 17.57.152.5 among others, with 3 other IP addresses in total.

mx01.mail.icloud.com along with mx02.mail.icloud.com each resolve to 17.42.251.62 IP addresses.

mx01.mail.icloud.com along with mx02.mail.icloud.com each resolve to 17.56.9.31 IP addresses.

mx01.mail.icloud.com along with mx02.mail.icloud.com each resolve to 17.57.152.5 IP addresses.

mx01.mail.icloud.com along with mx02.mail.icloud.com each resolve to 17.57.154.33 IP addresses.

mx01.mail.icloud.com along with mx02.mail.icloud.com each resolve to 17.57.155.25 IP addresses.

mx01.mail.icloud.com along with mx02.mail.icloud.com each resolve to 17.57.156.30 IP addresses.