coursesync.dev - dns.ninja

🛡️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 13:54:24

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

● 2026-08-31 08:17:36
● 2026-09-10 13:54:24

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

● 2026-08-31 08:17:36
● 2026-09-10 13:54:24

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

● 2026-08-31 08:17:36
● 2026-09-10 13:54:24

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

● 2026-08-31 08:17:36
● 2026-09-10 13:54:24

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

● 2026-08-31 08:17:36
● 2026-09-10 13:54:24

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

● 2026-08-31 08:17:36
● 2026-09-10 13:54:24

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

● 2026-08-31 08:17:36
● 2026-09-10 13:54:24

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

● 2026-08-31 08:17:36
● 2026-09-10 13:54:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	10 records
coursesync.dev	stevie.ns.cloudflare.com, jermaine.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.34.106

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursesync.dev (unsigned zone)

⏱️ Timing

Total: 917ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`185.199.109.153, 185.199.111.153...`
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`

📌 Glue Records Collected

Total: 10

Out-of-bailiwick: 10 (ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com...)

Analysis

IP Addresses

coursesync.dev directs to four IP numbers, which are 185.199.108.153, 185.199.109.153, 185.199.110.153 and 185.199.111.153.

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

Name Servers

The NS records for coursesync.dev delegate to jermaine.ns.cloudflare.com and stevie.ns.cloudflare.com.

coursesync.dev shares its NS records with other domains, for example valuetutors.uk, bubblesort-website.pages.dev, rr-101.com and two others.

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.

These name servers commonly co-occur with the name servers joyce.ns.cloudflare.com, chance.ns.cloudflare.com, dalary.ns.cloudflare.com and peter.ns.cloudflare.com.

DNS names with 6 IP addresses:

jermaine.ns.cloudflare.com maps to 108.162.195.157, 162.159.44.157, 172.64.35.157 and 3 additional IP addresses.

stevie.ns.cloudflare.com maps to 108.162.194.106, 162.159.38.106, 172.64.34.106 and 3 additional 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.

There is at least a partial MX overlap between coursesync.dev and other domains, including dearalana.com, coppercladlad.com, coxseo.com and two others.

DNS names with 6 IP addresses:

route1.mx.cloudflare.net maps to 162.159.205.11, 162.159.205.12, 162.159.205.13 and 3 additional IP addresses.

route2.mx.cloudflare.net maps to 162.159.205.17, 162.159.205.18, 162.159.205.19 and 3 additional IP addresses.

route3.mx.cloudflare.net maps to 162.159.205.23, 162.159.205.24, 162.159.205.25 and 3 additional IP addresses.