rtcourse.com - dns.ninja

`rtcourse.com`

DNSSEC	⚠️ Not signed
A	54.85.200.131^{🇺🇸 Amazon54.84.0.0/15 EC2 IAD prefix}
		PTR	`ec2-54-85-200-131.compute-1.amazonaws.com`
A	54.164.9.107^{🇺🇸 Amazon54.164.0.0/15 EC2 IAD prefix}
NS	`ns67.domaincontrol.com` ⭐
		A	2603:5:2174::2c^{🇺🇸 GODADDY-DNS2603:5:2170::/44}
			PTR	`ns67.domaincontrol.com`
		A	97.74.103.44^{🇺🇸 GODADDY-DNS97.74.102.0/23}
			PTR	`ns67.domaincontrol.com`
NS	`ns68.domaincontrol.com`
		A	2603:5:2274::2c^{🇺🇸 GODADDY-DNS2603:5:2270::/44}
			PTR	`ns68.domaincontrol.com`
		A	173.201.71.44^{🇺🇸 GODADDY-DNS173.201.70.0/23}
			PTR	`ns68.domaincontrol.com`
MX	`mxa-001a9a01.gslb.pphosted.com` ⭐
		A	67.231.144.135^{🇺🇸 Proofpoint67.231.144.0/24 Inc.}
			PTR	`mx0a-001a9a01.pphosted.com`
MX	`mxb-001a9a01.gslb.pphosted.com` ⭐
		A	67.231.144.135^{🇺🇸 Proofpoint67.231.144.0/24 Inc.}
			PTR	`mx0a-001a9a01.pphosted.com`
TXT	`v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all`
SOA	`ns67.domaincontrol.com`dns@jomax.net 2025-03-27 #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=1782039925

Same first word

rtcourse.com

Similar names

DNS History

12 records (6 active, 6 former)

●NSns67.domaincontrol.com2015-06-17 → 2026-06-21 · 2 obs

● 2015-06-17 07:42:40
● 2026-06-21 11:34:40

●NSns68.domaincontrol.com2015-06-17 → 2026-06-21 · 2 obs

● 2015-06-17 07:42:40
● 2026-06-21 11:34:40

●MXmxa-001a9a01.gslb.pphosted.com2026-03-27 → 2026-06-21 · 3 obs

○ 2020-02-08 14:48:34
● 2026-03-27 09:35:38
● 2026-06-21 11:34:40

●MXmxb-001a9a01.gslb.pphosted.com2026-03-27 → 2026-06-21 · 3 obs

○ 2020-02-08 14:48:34
● 2026-03-27 09:35:38
● 2026-06-21 11:34:40

○MXserver4.inboundmx.com2015-06-17 → 2017-03-17 · 4 obs

● 2015-06-17 07:42:40
● 2017-03-17 06:29:50
○ 2020-02-08 14:48:34
○ 2026-06-21 11:34:40

○MXserver5.inboundmx.com2015-06-17 → 2017-03-17 · 4 obs

● 2015-06-17 07:42:40
● 2017-03-17 06:29:50
○ 2020-02-08 14:48:34
○ 2026-06-21 11:34:40

○MXspam10.smarsh.com2020-02-08 → 2020-02-08 · 4 obs

○ 2017-03-17 06:29:50
● 2020-02-08 14:48:34
○ 2026-03-27 09:35:38
○ 2026-06-21 11:34:40

○MXspam9.smarsh.com2020-02-08 → 2020-02-08 · 4 obs

○ 2017-03-17 06:29:50
● 2020-02-08 14:48:34
○ 2026-03-27 09:35:38
○ 2026-06-21 11:34:40

○A184.168.131.2412020-02-08 → 2020-02-08 · 4 obs

○ 2017-03-17 06:29:50
● 2020-02-08 14:48:34
○ 2026-03-27 09:35:38
○ 2026-06-21 11:34:40

○A184.73.175.132015-06-17 → 2017-03-17 · 4 obs

● 2015-06-17 07:42:40
● 2017-03-17 06:29:50
○ 2020-02-08 14:48:34
○ 2026-06-21 11:34:40

●A54.164.9.1072026-03-27 → 2026-06-21 · 3 obs

○ 2020-02-08 14:48:34
● 2026-03-27 09:35:38
● 2026-06-21 11:34:40

●A54.85.200.1312026-03-27 → 2026-06-21 · 3 obs

○ 2020-02-08 14:48:34
● 2026-03-27 09:35:38
● 2026-06-21 11:34:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
rtcourse.com	ns67.domaincontrol.com, ns68.domaincontrol.com	4 records

✅ Authoritative Response

Server:173.201.71.44

NS records: ns67.domaincontrol.com, ns68.domaincontrol.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rtcourse.com (unsigned zone)

⏱️ Timing

Total: 218ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`54.85.200.131, 54.164.9.107`
NS	2	`ns67.domaincontrol.com, ns68.domaincontrol.com`
MX	2	`mxa-001a9a01.gslb.pphosted.com (pri: 10), mxb-001a9a01.gslb.pphosted.com (pri: 10)`
TXT	1	`v=spf1 include:%{ir}.%{v}.%{d}.spf.has.p`
SOA	1	`ns67.domaincontrol.com dns.jomax.net`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns67.domaincontrol.com, ns67.domaincontrol.com, ns68.domaincontrol.com...)

Analysis

IP Addresses

rtcourse.com has two IP addresses: 54.85.200.131 and 54.164.9.107

Additional host names — zumafinancial.com, blueriverfinancialgroup.com, hoeywealthmanagement.com and two others — share IP numbers with rtcourse.com.

Name Servers

rtcourse.com uses two name servers for its delegation: ns67.domaincontrol.com and ns68.domaincontrol.com.

rtcourse.com shares its name server setup with other domains, including b4workout.com, girlsonlyweekends.com, brightondogphotography.co.uk and two others.

At least some of rtcourse.com's name servers are also used by other domains, among them joserios.com.

The two host names ns67.domaincontrol.com and ns68.domaincontrol.com each have a pair of IP addresses: ns67.domaincontrol.com has 97.74.103.44 and 2603:5:2174::2c, and ns68.domaincontrol.com has 173.201.71.44 and 2603:5:2274::2c.

Mail Servers

rtcourse.com has two mail servers: mxa-001a9a01.gslb.pphosted.com and mxb-001a9a01.gslb.pphosted.com.

rtcourse.com shares the same mail server setup as other domains, including amtaxadvisors.com, milestonewm.com, vsrfin.com and two others.

rtcourse.com shares mail servers — at least in part — with other domains, including lurieandco.com, joinjpturner.com, nastali.com and two others.

These mail servers are frequently seen alongside the mail servers hex.namehub.com.

mxa-001a9a01.gslb.pphosted.com resolves to 67.231.144.135; mxb-001a9a01.gslb.pphosted.com resolves to the same IP address, 67.231.144.135.

Both mxa-001a9a01.gslb.pphosted.com and mxb-001a9a01.gslb.pphosted.com resolve to 67.231.144.135 IP addresses each.