coursecert.com - robtex.com

coursecert.com

DNSSEC⚠️ Not signed
NSns1.namebrightdns.com ⭐ ⚠️ Not in parent delegation
A2600:1f18:683a:ae1a:111c:4291:9c72:702d🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A2600:1f18:683a:ae1a:8b2d:453e:ca75:106e🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A2600:1f18:683a:ae1a:e0e8:f080:7325:d0f3🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A3.89.244.178🇺🇸 Amazon3.80.0.0/12 EC2 IAD prefix
PTRec2-3-89-244-178.compute-1.amazonaws.com
A54.234.54.230🇺🇸 Amazon54.234.0.0/15 EC2 IAD prefix
PTRec2-54-234-54-230.compute-1.amazonaws.com
NSns2.namebrightdns.com ⚠️ Not in parent delegation
A2600:1f18:683a:ae1b:4646:c223:a1f9:22a3🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A2600:1f18:683a:ae1b:a710:9077:363f:bb20🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A34.207.140.82🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix
PTRec2-34-207-140-82.compute-1.amazonaws.com
A54.196.237.195🇺🇸 Amazon54.196.0.0/15 EC2 IAD 54.196.0.0/15
PTRec2-54-196-237-195.compute-1.amazonaws.com
A54.210.157.130🇺🇸 Amazon54.210.0.0/16 EC2 IAD VPC Address Range
PTRec2-54-210-157-130.compute-1.amazonaws.com
NSnsg1.namebrightdns.com ⚠️ Not in zone NS records
A2600:1f18:683a:ae1a:7d0c:28f5:ebc9:1ac8🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A2600:1f18:683a:ae1a:94d8:6b55:f3b0:2b6e🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A2600:1f18:683a:ae1b:dc6d:2ff5:8ede:179e🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A2600:1f18:683a:ae1b:ee21:228d:fab6:9af5🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A54.90.178.80🇺🇸 Amazon54.90.0.0/15 EC2 IAD prefix
PTRec2-54-90-178-80.compute-1.amazonaws.com
A54.157.217.233🇺🇸 Amazon54.156.0.0/14 EC2 IAD prefix
PTRec2-54-157-217-233.compute-1.amazonaws.com
A54.197.162.93🇺🇸 Amazon54.196.0.0/15 EC2 IAD 54.196.0.0/15
PTRec2-54-197-162-93.compute-1.amazonaws.com
A98.92.6.123🇺🇸 Amazon98.88.0.0/13 EC2 IAD prefix
PTRec2-98-92-6-123.compute-1.amazonaws.com
NSnsg2.namebrightdns.com ⚠️ Not in zone NS records
A2600:1f18:683a:ae1a:1778:6ee0:530:c411🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A2600:1f18:683a:ae1a:7db3:b04b:3783:ac2🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A2600:1f18:683a:ae1b:7758:b87:5dc2:23a9🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A2600:1f18:683a:ae1b:ef75:e8e2:9a50:1e79🇺🇸 Amazon2600:1f18:6000::/35 AMAZON EC2 IAD prefix
A3.90.68.229🇺🇸 Amazon3.80.0.0/12 EC2 IAD prefix
PTRec2-3-90-68-229.compute-1.amazonaws.com
A35.171.187.120🇺🇸 Amazon35.168.0.0/13 EC2 IAD prefix
PTRec2-35-171-187-120.compute-1.amazonaws.com
A54.145.2.185🇺🇸 Amazon54.144.0.0/14 EC2 IAD NAT prefix
PTRec2-54-145-2-185.compute-1.amazonaws.com
A100.31.153.57🇺🇸 Amazon100.24.0.0/13 EC2 IAD prefix
PTRec2-100-31-153-57.compute-1.amazonaws.com
SOAns1.namebrightdns.comdns@namebright.com 2026-04-25 #1

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1777123241

Subdomains

mail.coursecert.com

Same first word

coursecert.com

Similar names

ctresource.com.sg

DNS History

8 records (4 active, 4 former)

2017201820192020202120222023202420252026NSns1.namebrightdns.comns2.namebrightdns.comnsg1.namebrightdns.comnsg2.namebrightdns.comns1.coursecert.comns2.coursecert.comMXmail.coursecert.comA38.86.48.125
○NSns1.coursecert.com2016-03-06 → 2016-03-06 · 3 obs
● 2016-03-06 04:03:58
○ 2017-02-19 13:53:24
○ 2026-04-25 13:40:56
●NSns1.namebrightdns.com2026-03-19 → 2026-04-25 · 3 obs
○ 2017-02-19 13:53:24
● 2026-03-19 10:50:24
● 2026-04-25 13:40:56
○NSns2.coursecert.com2016-03-06 → 2016-03-06 · 3 obs
● 2016-03-06 04:03:58
○ 2017-02-19 13:53:24
○ 2026-04-25 13:40:56
●NSns2.namebrightdns.com2026-03-19 → 2026-04-25 · 3 obs
○ 2017-02-19 13:53:24
● 2026-03-19 10:50:24
● 2026-04-25 13:40:56
●NSnsg1.namebrightdns.com2026-03-19 → 2026-04-25 · 3 obs
○ 2017-02-19 13:53:24
● 2026-03-19 10:50:24
● 2026-04-25 13:40:56
●NSnsg2.namebrightdns.com2026-03-19 → 2026-04-25 · 3 obs
○ 2017-02-19 13:53:24
● 2026-03-19 10:50:24
● 2026-04-25 13:40:56
○MXmail.coursecert.com2016-03-06 → 2016-03-06 · 3 obs
● 2016-03-06 04:03:58
○ 2017-02-19 13:53:24
○ 2026-04-25 13:40:56
○A38.86.48.1252016-03-06 → 2016-03-06 · 3 obs
● 2016-03-06 04:03:58
○ 2017-02-19 13:53:24
○ 2026-04-25 13:40:56

🔍 DNS Trace

Analysis

Hierarchy

coursecert.com is parent of mail.coursecert.com.

Name Servers

coursecert.com is delegated to four name servers: ns1.namebrightdns.com, ns2.namebrightdns.com, nsg1.namebrightdns.com and nsg2.namebrightdns.com.

coursecert.com at least partially shares its name servers with other domains, for instance diacd.com, 36.58.dfwtx.partnershipbroadband.com, winort.com, conusx.com and rollingeagle.com.

These name servers are commonly used alongside domain-for-sale.hugedomainsdns.com and forsale.hugedomainsdns.com.

Host names with eight IP numbers:

Host name nsg1.namebrightdns.com points to 2600:1f18:683a:ae1a:7d0c:28f5:ebc9:1ac8, 2600:1f18:683a:ae1a:94d8:6b55:f3b0:2b6e, 2600:1f18:683a:ae1b:dc6d:2ff5:8ede:179e, 2600:1f18:683a:ae1b:ee21:228d:fab6:9af5, 54.90.178.80, 54.157.217.233, 54.197.162.93 and 98.92.6.123; Host name nsg2.namebrightdns.com points to 2600:1f18:683a:ae1a:1778:6ee0:530:c411, 2600:1f18:683a:ae1a:7db3:b04b:3783:ac2, 2600:1f18:683a:ae1b:7758:b87:5dc2:23a9, 2600:1f18:683a:ae1b:ef75:e8e2:9a50:1e79, 3.90.68.229, 35.171.187.120, 54.145.2.185 and 100.31.153.57.

Host names with five IP numbers:

Host name ns1.namebrightdns.com points to 2600:1f18:683a:ae1a:111c:4291:9c72:702d, 2600:1f18:683a:ae1a:8b2d:453e:ca75:106e, 2600:1f18:683a:ae1a:e0e8:f080:7325:d0f3, 3.89.244.178 and 54.234.54.230; Host name ns2.namebrightdns.com points to 2600:1f18:683a:ae1b:4646:c223:a1f9:22a3, 2600:1f18:683a:ae1b:a710:9077:363f:bb20, 34.207.140.82, 54.196.237.195 and 54.210.157.130.