substackchallenge.com - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`substackchallenge.com`

DNSSEC	⚠️ Not signed
NS	`curt.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b5e^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`curt.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c15e^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`curt.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:215e^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`curt.ns.cloudflare.com`
		A	108.162.193.94^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`curt.ns.cloudflare.com`
		A	172.64.33.94^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`curt.ns.cloudflare.com`
		A	173.245.59.94^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`curt.ns.cloudflare.com`
NS	`lucy.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a85^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lucy.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c085^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lucy.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2085^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lucy.ns.cloudflare.com`
		A	108.162.192.133^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lucy.ns.cloudflare.com`
		A	172.64.32.133^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lucy.ns.cloudflare.com`
		A	173.245.58.133^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lucy.ns.cloudflare.com`
SOA	`curt.ns.cloudflare.com`dns@cloudflare.com serial=2409634199

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1788515135

Same first word

substackchallenge.com

Previous names

Next names

DNS History

2 records (2 active, 0 former)

●NScurt.ns.cloudflare.com2026-08-17 → 2026-09-04 · 2 obs

● 2026-08-17 15:51:14
● 2026-09-04 09:59:38

●NSlucy.ns.cloudflare.com2026-08-17 → 2026-09-04 · 2 obs

● 2026-08-17 15:51:14
● 2026-09-04 09:59:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
substackchallenge.com	lucy.ns.cloudflare.com, curt.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.94

NS records: lucy.ns.cloudflare.com, curt.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for substackchallenge.com (unsigned zone)

⏱️ Timing

Total: 130ms | Queries: -

📄 Records

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

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (lucy.ns.cloudflare.com, lucy.ns.cloudflare.com, lucy.ns.cloudflare.com...)

Analysis

Name Servers

substackchallenge.com is delegated to two name servers: curt.ns.cloudflare.com and lucy.ns.cloudflare.com.

substackchallenge.com has the same name server delegation as a number of other domains, such as synctalentindia.com, bitzac.com, consultor.ar and two more.

At least some of substackchallenge.com's name servers are shared with other domains, for example kindred-scotland.org, hktvapp.workers.dev, redizajn.ba and two more.

Host names resolving to 6 IP numbers:

curt.ns.cloudflare.com resolves to 108.162.193.94, 172.64.33.94, 173.245.59.94 and 3 other IP addresses.

lucy.ns.cloudflare.com resolves to 108.162.192.133, 172.64.32.133, 173.245.58.133 and 3 other IP addresses.