coursebrowser.org - dns.ninja

`coursebrowser.org`

DNSSEC	⚠️ Not signed
NS	`olga.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a89^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`olga.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c089^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`olga.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2089^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`olga.ns.cloudflare.com`
		A	108.162.192.137^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`olga.ns.cloudflare.com`
		A	172.64.32.137^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`olga.ns.cloudflare.com`
		A	173.245.58.137^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`olga.ns.cloudflare.com`
NS	`trevor.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c9a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trevor.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c39a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`trevor.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:239a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`trevor.ns.cloudflare.com`
		A	108.162.195.154^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trevor.ns.cloudflare.com`
		A	162.159.44.154^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trevor.ns.cloudflare.com`
		A	172.64.35.154^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trevor.ns.cloudflare.com`
SOA	`olga.ns.cloudflare.com`dns@cloudflare.com serial=2406843282

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1785433416

Same first word

coursebrowser.com

coursebrowser.org

DNS History

2 records (2 active, 0 former)

●NSolga.ns.cloudflare.com2026-03-24 → 2026-07-30 · 2 obs

● 2026-03-24 15:24:36
● 2026-07-30 18:22:16

●NStrevor.ns.cloudflare.com2026-03-24 → 2026-07-30 · 2 obs

● 2026-03-24 15:24:36
● 2026-07-30 18:22:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org	-
coursebrowser.org	trevor.ns.cloudflare.com, olga.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.44.154

NS records: trevor.ns.cloudflare.com, olga.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursebrowser.org (unsigned zone)

⏱️ Timing

Total: 196ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`olga.ns.cloudflare.com, trevor.ns.cloudflare.com`
SOA	1	`olga.ns.cloudflare.com dns.cloudflare.co`

Analysis

Name Servers

The NS records for coursebrowser.org delegate to olga.ns.cloudflare.com and trevor.ns.cloudflare.com.

coursebrowser.org shares its name server setup with other domains, including redhouserh.com, erodvd.nl, judental.com and two others.

coursebrowser.org has at least partial name server overlap with other domains, such as lej.us, davidrouzer.com, www-(0x786e7878)-(0x6d696c66).rest and two others.

It is common to find these name servers paired with the name servers barbara.ns.cloudflare.com, linda.ns.cloudflare.com, kay.ns.cloudflare.com and carl.ns.cloudflare.com.

Host names with 6 IP numbers:

olga.ns.cloudflare.com maps to 108.162.192.137, 172.64.32.137, 173.245.58.137 and 3 additional IP addresses.

trevor.ns.cloudflare.com maps to 108.162.195.154, 162.159.44.154, 172.64.35.154 and 3 additional IP addresses.