coursekit.dev - robtex.com

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

coursekit.dev

DNSSEC⚠️ Not signed
A75.2.60.5🇺🇸 Amazon75.2.60.0/24 Prod
PTRacd89244c803f7181.awsglobalaccelerator.com
A99.83.231.61🇺🇸 Amazon99.83.224.0/20
NSns1.dnsimple-edge.com ⭐
A2620:111:8004::53🇺🇸 AS327712620:111:8004::/48 DNSimple Corporation
A199.247.152.53🇺🇸 AS32771199.247.152.0/24 DNSimple Corporation
NSns2.dnsimple-edge.net
A2620:111:8005::53🇺🇸 AS327712620:111:8005::/48 Vultr Customer Route
A199.247.153.53🇺🇸 AS32771199.247.153.0/24 Vultr Customer Route
NSns3.dnsimple-edge.io
A2620:111:8006::53🇺🇸 AS327712620:111:8006::/48 DNSimple Corporation
A199.247.154.53🇺🇸 AS32771199.247.154.0/24 DNSimple Corporation
NSns4.dnsimple-edge.org
A2620:111:8007::53🇺🇸 AS327712620:111:8007::/48 Vultr Customer Route
A199.247.155.53🇺🇸 AS32771199.247.155.0/24 Vultr Customer Route
MXin1-smtp.messagingengine.com ⭐
A103.168.172.216🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRphl-mx-01.messagingengine.com
A103.168.172.217🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRphl-mx-02.messagingengine.com
A103.168.172.218🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRphl-mx-03.messagingengine.com
A103.168.172.219🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRphl-mx-04.messagingengine.com
A103.168.172.220🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRphl-mx-05.messagingengine.com
A103.168.172.221🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRphl-mx-06.messagingengine.com
A103.168.172.222🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRphl-mx-07.messagingengine.com
A103.168.172.223🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRphl-mx-08.messagingengine.com
MXin2-smtp.messagingengine.com(20)
A202.12.124.216TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRstl-mx-01.messagingengine.com
A202.12.124.217TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRstl-mx-02.messagingengine.com
A202.12.124.218TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRstl-mx-03.messagingengine.com
A202.12.124.219TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street
PTRstl-mx-04.messagingengine.com
TXTgoogle-site-verification=1IY-1RgJ7T4SsF6HdGMr1B0mkd-9TajTnW-mxqkIavw
TXTpaddle-verification=5985fb6a
TXTstripe-verification=464a3e81b140a853c34868422f3e66d864a6564c256a5c1f7d8c6bc9c...
TXTv=spf1 include:_spf.mailersend.net include:spf.messagingengine.com ?all
SOAns1.dnsimple-edge.comadmin@dnsimple.com serial=1636611773

dev

DNSSEC🔒 Signed (DS record present)
NSns-tld1.charlestonroadregistry.com ⭐
NSns-tld2.charlestonroadregistry.com
NSns-tld3.charlestonroadregistry.com
NSns-tld4.charlestonroadregistry.com
NSns-tld5.charlestonroadregistry.com
SOAns-tld1.charlestonroadregistry.comcloud-dns-hostmaster@google.com serial=1
🔒 HSTS Preload (+subdomains)

Same first word

coursekit.app
coursekit.ca
coursekit.com.au
coursekit.us
coursekit.sbs
coursekit.tools
coursekit.pages.dev
coursekit.dev
coursekit.net
coursekit.co
coursekit.com

Similar names

sourcekit.co.uk
sickroute.com
eurostick.eu
kitruscoe.com
eurostick.es
rocksuite.co.uk
kuriostec.com
kitcourse.com
sourcekit.com.au
cuiorkest.nl
eurostick.de
rocksuite.com
suirocket.xyz
eurostick.com
kucistore.store
sourcekit.com
eurostick.co.uk
coursetik.com
eurostick.it
cukistore.shop
eurostick.com.ua
eurostick.se
sourcekit.org
estockuri.ro
kitsource.com
erikcouts.com.uy
kitsource.info
eurostick.pl
ecorustik.com
ktisource.com
sourcekit.cc
cirkouest.fr
sourcekit.ai
courteski.com

Previous names

courchainephd.dev
courcy.dev
coureau.dev
couri.dev
courier.dev
couriermails.dev
couriers.dev
couriersus.dev
courierx.dev
courrier.dev
course-bricks.dev
course-explorer.dev
course-go.dev
course-planner.dev
course.dev
coursearc.dev
coursebricks.dev
coursecatalyst.dev
courseforge.dev
coursehub.dev

Next names

courselab.dev
courselauncher.dev
courselink.dev
coursely.dev
coursenow.dev
courseplanner.dev
courseplay.dev
courseplete.dev
courser.dev
coursestudio.dev
coursesync.dev
courseware.dev
coursey.dev
coursi.dev
coursify.dev
courson.dev
court-side.dev
courtbright.dev

DNS History

8 records (8 active, 0 former)

NSns1.dnsimple-edge.comns2.dnsimple-edge.netns3.dnsimple-edge.ions4.dnsimple-edge.orgMXin1-smtp.messagingengine.comin2-smtp.messagingengine.comA75.2.60.599.83.231.61
●NSns1.dnsimple-edge.com2026-08-29 → 2026-09-15 · 2 obs
● 2026-08-29 20:39:42
● 2026-09-15 21:29:46
●NSns2.dnsimple-edge.net2026-08-29 → 2026-09-15 · 2 obs
● 2026-08-29 20:39:42
● 2026-09-15 21:29:46
●NSns3.dnsimple-edge.io2026-08-29 → 2026-09-15 · 2 obs
● 2026-08-29 20:39:42
● 2026-09-15 21:29:46
●NSns4.dnsimple-edge.org2026-08-29 → 2026-09-15 · 2 obs
● 2026-08-29 20:39:42
● 2026-09-15 21:29:46
●MXin1-smtp.messagingengine.com2026-08-29 → 2026-09-15 · 2 obs
● 2026-08-29 20:39:42
● 2026-09-15 21:29:46
●MXin2-smtp.messagingengine.com2026-08-29 → 2026-09-15 · 2 obs
● 2026-08-29 20:39:42
● 2026-09-15 21:29:46
●A75.2.60.52026-08-29 → 2026-09-15 · 2 obs
● 2026-08-29 20:39:42
● 2026-09-15 21:29:46
●A99.83.231.612026-08-29 → 2026-09-15 · 2 obs
● 2026-08-29 20:39:42
● 2026-09-15 21:29:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
devns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...-
coursekit.devns3.dnsimple-edge.io, ns4.dnsimple-edge.org, ns2.dnsimple-edge.net, ns1.dnsimple-edge.com-

✅ Authoritative Response

Server:199.247.154.53

NS records: ns3.dnsimple-edge.io, ns4.dnsimple-edge.org, ns2.dnsimple-edge.net, ns1.dnsimple-edge.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursekit.dev (unsigned zone)

⏱️ Timing

Total: 1455ms | Queries: -

📄 Records

TypeCountSample Data
A275.2.60.5, 99.83.231.61
NS4ns1.dnsimple-edge.com, ns2.dnsimple-edge.net...
MX2in1-smtp.messagingengine.com (pri: 10), in2-smtp.messagingengine.com (pri: 20)
TXT4google-site-verification=1IY-1RgJ7T4SsF6, paddle-verification=5985fb6a...
SOA1ns1.dnsimple-edge.com admin.dnsimple.com

Analysis

IP Addresses

coursekit.dev has two IP addresses: 75.2.60.5 and 99.83.231.61

edartbook.co.il, qqttai.com, best-va.com and two other host names share IP numbers with coursekit.dev.

Name Servers

The authoritative name servers for coursekit.dev are ns1.dnsimple-edge.com, ns3.dnsimple-edge.io, ns2.dnsimple-edge.net and ns4.dnsimple-edge.org.

The name servers of coursekit.dev overlap at least partially with those of other domains — among them familysave.com.au, smoothbits.de, unusualqa.com and two more.

These name servers commonly appear alongside the name servers ns1.dnsimple.com and ns3.dnsimple.com.

Each of the four hosts ns1.dnsimple-edge.com, ns3.dnsimple-edge.io, ns2.dnsimple-edge.net and ns4.dnsimple-edge.org has two IP addresses. ns1.dnsimple-edge.com points to 199.247.152.53 and 2620:111:8004::53. ns3.dnsimple-edge.io points to 199.247.154.53 and 2620:111:8006::53. ns2.dnsimple-edge.net points to 199.247.153.53 and 2620:111:8005::53. ns4.dnsimple-edge.org points to 199.247.155.53 and 2620:111:8007::53.

Mail Servers

Mail for coursekit.dev is handled by two mail servers — in1-smtp.messagingengine.com and in2-smtp.messagingengine.com.

coursekit.dev uses an identical mail server configuration to several other domains — among them discomarder.live, dodgetech.com, civictech.ie and two more.

The mail servers for coursekit.dev overlap at least partially with those of other domains, including plantationhouse-srilanka.com and splendidproductions.co.uk.

Hostnames that resolve to 8 IP addresses:

in1-smtp.messagingengine.com resolves to 103.168.172.216, 103.168.172.217, 103.168.172.218 and 5 other IP addresses.

Hosts that point to four IP numbers:

in2-smtp.messagingengine.com resolves to 202.12.124.216, 202.12.124.217, 202.12.124.218 and 202.12.124.219.