mail.coursecert.com - robtex.com

mail.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

coursecert.com

DNSSEC⚠️ Not signed
NSns1.namebrightdns.com ⭐ ⚠️ Not in parent delegation
NSns2.namebrightdns.com ⚠️ Not in parent delegation
NSnsg1.namebrightdns.com ⚠️ Not in zone NS records
NSnsg2.namebrightdns.com ⚠️ Not in zone NS records
SOAns1.namebrightdns.comdns@namebright.com 2026-04-25 #1

PTR for

125.48.86.38.in-addr.arpa

Previously MX for

coursecert.com

Same first word

mail.gov.na
mail.co.nz
mail.sdscloud.pl
mail.az
mail.is
mail.gov.zw
mail.id
mail.tr
mail.tt
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mail.readymade.jp
mail.raindrop.jp
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mail.mydissent.net
mail.spdns.org
mail.lk
mail.fish
mail.pp.ua
mail.fun
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mail.mydns.bz
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mail.s3.amazonaws.com
mail.gov.ye
mail.com.kg
mail.nra
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mail.radio.fm
mail.od.ua
mail.ms
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mail.mydns.vc
mail.lutsk.ua
mail.kz
mail.im
mail.kaas.gg
mail.it.com
mail.gov.mg
mail.ss
mail.co
mail.tc
mail.gda.pl
mail.world
mail.pe
mail.sunnyday.jp
mail.group
mail.gov
mail.org.za
mail.mx
mail.cy
mail.gov.ae
mail.com.ba
mail.co.zw
mail.org
mail.pixolino.com
mail.ug
mail.ly
mail.gs
mail.bg
mail.wtf
mail.webhop.me
mail.al
mail.myfast.space
mail.vip
mail.red
mail.co.il
mail.pf
mail.com.mx
mail.uy
mail.gt
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mail.in.ua
mail.cx
mail.gm
mail.su
mail.toshiba
mail.hosting
mail.net.tr
mail.fm
mail.mil
mail.f5.si
mail.party
mail.tax
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mail.directory
mail.freemyip.com
mail.com.tw
mail.mh
mail.gov.mw
mail.gov.bn
mail.mmafan.biz
mail.ky
mail.synology-diskstation.de
mail.schoolbus.jp
mail.uz.ua
mail.cool

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DNS History

2 records (2 active, 0 former)

NSns1.namebrightdns.comns2.namebrightdns.com
●NSns1.namebrightdns.com2026-03-27 → 2026-04-25 · 2 obs
● 2026-03-27 06:10:18
● 2026-04-25 12:07:18
●NSns2.namebrightdns.com2026-03-27 → 2026-04-25 · 2 obs
● 2026-03-27 06:10:18
● 2026-04-25 12:07:18

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comf.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, k.gtld-servers.net...-
coursecert.comnsg1.namebrightdns.com, nsg2.namebrightdns.com16 records

✅ Authoritative Response

Server:54.157.217.233

NS records: nsg1.namebrightdns.com, nsg2.namebrightdns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursecert.com (unsigned zone)

⏱️ Timing

Total: 164ms | Queries: -

📄 Records

TypeCountSample Data
NS2ns1.namebrightdns.com, ns2.namebrightdns.com

📌 Glue Records Collected

Total: 16

Out-of-bailiwick: 16 (nsg1.namebrightdns.com, nsg1.namebrightdns.com, nsg1.namebrightdns.com...)

Analysis

Name Servers

Two name servers ns1.namebrightdns.com and ns2.namebrightdns.com handle delegation for mail.coursecert.com.

mail.coursecert.com uses the same name server setup as other domains, for example fileia.com, contraband.net, trmobil.com, karatemasters.com and wind131.buygoodsonline.com.

mail.coursecert.com partially shares name servers with other domains; examples include vrops.com, navicars.com, bizprivate.com, 2simon.com and gsmgaragedoors.com.

These name servers commonly accompany nsg1.namebrightdns.com, nsg2.namebrightdns.com, domain-for-sale.hugedomainsdns.com and forsale.hugedomainsdns.com.

Five IP numbers per host:

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.

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.