🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`coursesync.dev`

DNSSEC	⚠️ Not signed
A	185.199.108.153^{🇺🇸 Fastly185.199.108.0/24 GitHub - 185.199.108.0/24}
		PTR	`cdn-185-199-108-153.github.com`
A	185.199.109.153^{🇺🇸 Fastly185.199.109.0/24 GitHub - 185.199.109.0/24}
A	185.199.110.153^{🇺🇸 Fastly185.199.110.0/24 GitHub - 185.199.110.0/24}
A	185.199.111.153^{🇺🇸 Fastly185.199.111.0/24 GitHub - 185.199.111.0/24}
NS	`jermaine.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c9d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jermaine.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c39d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jermaine.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:239d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jermaine.ns.cloudflare.com`
		A	108.162.195.157^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jermaine.ns.cloudflare.com`
		A	162.159.44.157^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jermaine.ns.cloudflare.com`
		A	172.64.35.157^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jermaine.ns.cloudflare.com`
NS	`stevie.ns.cloudflare.com`
		A	2606:4700:50::a29f:266a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stevie.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c26a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`stevie.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:226a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`stevie.ns.cloudflare.com`
		A	108.162.194.106^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stevie.ns.cloudflare.com`
		A	162.159.38.106^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stevie.ns.cloudflare.com`
		A	172.64.34.106^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stevie.ns.cloudflare.com`
MX	`route3.mx.cloudflare.net` ⭐
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
MX	`route2.mx.cloudflare.net`⁽⁶¹⁾
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
MX	`route1.mx.cloudflare.net`⁽⁷²⁾
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
TXT	`v=spf1 include:send.resend.com include:_spf.mx.cloudflare.net ~all`
SOA	`jermaine.ns.cloudflare.com`dns@cloudflare.com serial=2414262206

`dev`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=1

🔒 HSTS Preload (+subdomains)

Same first word

coursesync.ca

coursesync.biz

coursesync.pages.dev

coursesync.de

coursesync.com

coursesync.dev

Similar names

Previous names

Next names

DNS History

9 records (9 active, 0 former)

●NSjermaine.ns.cloudflare.com2026-08-31 → 2026-09-10 · 2 obs

● 2026-08-31 08:17:36
● 2026-09-10 12:00:36

●NSstevie.ns.cloudflare.com2026-08-31 → 2026-09-10 · 2 obs

● 2026-08-31 08:17:36
● 2026-09-10 12:00:36

●MXroute1.mx.cloudflare.net2026-08-31 → 2026-09-10 · 2 obs

● 2026-08-31 08:17:36
● 2026-09-10 12:00:36

●MXroute2.mx.cloudflare.net2026-08-31 → 2026-09-10 · 2 obs

● 2026-08-31 08:17:36
● 2026-09-10 12:00:36

●MXroute3.mx.cloudflare.net2026-08-31 → 2026-09-10 · 2 obs

● 2026-08-31 08:17:36
● 2026-09-10 12:00:36

●A185.199.108.1532026-08-31 → 2026-09-10 · 2 obs

● 2026-08-31 08:17:36
● 2026-09-10 12:00:36

●A185.199.109.1532026-08-31 → 2026-09-10 · 2 obs

● 2026-08-31 08:17:36
● 2026-09-10 12:00:36

●A185.199.110.1532026-08-31 → 2026-09-10 · 2 obs

● 2026-08-31 08:17:36
● 2026-09-10 12:00:36

●A185.199.111.1532026-08-31 → 2026-09-10 · 2 obs

● 2026-08-31 08:17:36
● 2026-09-10 12:00:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	-
coursesync.dev	jermaine.ns.cloudflare.com, stevie.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.38.106

NS records: jermaine.ns.cloudflare.com, stevie.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursesync.dev (unsigned zone)

⏱️ Timing

Total: 1756ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`185.199.110.153, 185.199.108.153...`
NS	2	`jermaine.ns.cloudflare.com, stevie.ns.cloudflare.com`
MX	3	`route3.mx.cloudflare.net (pri: 10), route2.mx.cloudflare.net (pri: 61)...`
TXT	1	`v=spf1 include:send.resend.com include:_`
SOA	1	`jermaine.ns.cloudflare.com dns.cloudflar`

Analysis

IP Addresses

coursesync.dev points to the four IP addresses 185.199.108.153, 185.199.109.153, 185.199.110.153 and 185.199.111.153.

silviasabino.co.uk, snow-republic.ch, linhqt.com and two other host names share IP numbers with coursesync.dev.

Name Servers

coursesync.dev uses two name servers for its delegation: jermaine.ns.cloudflare.com and stevie.ns.cloudflare.com.

coursesync.dev uses the same name servers as several other domains — among them valuetutors.uk, bubblesort-website.pages.dev, rr-101.com and two more.

The name servers of coursesync.dev overlap at least partially with those of other domains — among them siamceramics.com, jeffreyg.net, appcommercialsolutions.com and two more.

It is common to find these name servers alongside the name servers joyce.ns.cloudflare.com, dalary.ns.cloudflare.com, peter.ns.cloudflare.com and two others.

Hostnames that resolve to 6 IP addresses:

Hostname jermaine.ns.cloudflare.com directs to 108.162.195.157, 162.159.44.157 and 172.64.35.157 along with 3 other IP addresses.

Hostname stevie.ns.cloudflare.com directs to 108.162.194.106, 162.159.38.106 and 172.64.34.106 along with 3 other IP addresses.

Mail Servers

Mail for coursesync.dev is routed through three mail servers — route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

coursesync.dev has at least partial mail server overlap with other domains such as dearalana.com, coppercladlad.com, coxseo.com and two more.

Hostnames that resolve to 6 IP addresses:

Hostname route1.mx.cloudflare.net directs to 162.159.205.11, 162.159.205.12 and 162.159.205.13 along with 3 other IP addresses.

Hostname route2.mx.cloudflare.net directs to 162.159.205.17, 162.159.205.18 and 162.159.205.19 along with 3 other IP addresses.

Hostname route3.mx.cloudflare.net directs to 162.159.205.23, 162.159.205.24 and 162.159.205.25 along with 3 other IP addresses.

coursesync.dev - robtex.com

coursesync.dev

dev

Same first word

Similar names

Previous names

Next names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`coursesync.dev`

`dev`