`classroomchallenge.com`

DNSSEC	⚠️ Not signed
A	207.148.248.143^{🇺🇸 EIG-29873207.148.248.0/24}
		PTR	`ip-207-148-248-143.defastlink.net`
NS	`ns.buydomains.com` ⚠️ Not in zone NS records
		A	52.20.26.87^{🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix}
			PTR	`ec2-52-20-26-87.compute-1.amazonaws.com`
NS	`this-domain-for-sale.com` ⚠️ Not in zone NS records
		A	52.20.26.87^{🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix}
			PTR	`ec2-52-20-26-87.compute-1.amazonaws.com`

`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=1771291435

Subdomains

hostmaster.classroomchallenge.com

DNS History

10 records (3 active, 7 former)

●NSns.buydomains.com2026-03-23 → 2026-03-23 · 2 obs

○ 2015-06-13 07:27:12
● 2026-03-23 05:52:02

○NSns1.domaindiscover.com2007-11-12 → 2007-11-12 · 3 obs

● 2007-11-12 23:57:00
○ 2015-06-13 07:27:12
○ 2026-03-23 05:52:02

○NSns2.domaindiscover.com2007-11-12 → 2007-11-12 · 3 obs

● 2007-11-12 23:57:00
○ 2015-06-13 07:27:12
○ 2026-03-23 05:52:02

●NSthis-domain-for-sale.com2026-03-23 → 2026-03-23 · 2 obs

○ 2015-06-13 07:27:12
● 2026-03-23 05:52:02

○MXmx3.daemonmail.net2007-11-12 → 2007-11-12 · 3 obs

● 2007-11-12 23:57:00
○ 2015-06-13 07:27:12
○ 2026-03-23 05:52:02

○MXmx5.daemonmail.net2007-11-12 → 2007-11-12 · 3 obs

● 2007-11-12 23:57:00
○ 2015-06-13 07:27:12
○ 2026-03-23 05:52:02

●A207.148.248.1432015-11-09 → 2026-03-23 · 3 obs

○ 2015-06-13 07:27:12
● 2015-11-09 16:28:24
● 2026-03-23 05:52:02

○A216.104.161.1032007-11-12 → 2007-11-12 · 3 obs

● 2007-11-12 23:57:00
○ 2015-06-13 07:27:12
○ 2026-03-23 05:52:02

○A216.104.161.2032007-11-12 → 2007-11-12 · 3 obs

● 2007-11-12 23:57:00
○ 2015-06-13 07:27:12
○ 2026-03-23 05:52:02

○A66.151.181.492015-06-13 → 2015-06-13 · 4 obs

○ 2007-11-12 23:57:00
● 2015-06-13 07:27:12
○ 2015-11-09 16:28:24
○ 2026-03-23 05:52:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, f.gtld-servers.net, e.gtld-servers.net, l.gtld-servers.net...	-
classroomchallenge.com	ns.buydomains.com, this-domain-for-sale.com	2 records

✅ Authoritative Response

Server:52.20.26.87

NS records: ns.buydomains.com, this-domain-for-sale.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classroomchallenge.com (unsigned zone)

⏱️ Timing

Total: 65ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`207.148.248.143`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns.buydomains.com, this-domain-for-sale.com)

Analysis

Hierarchy

classroomchallenge.com is parent of hostmaster.classroomchallenge.com.

IP Addresses

classroomchallenge.com points to a single IP: 207.148.248.143.

Other host names, for instance xantric.com, cpabonus.com, advicemart.com, travellaboratory.com and www.mycuties.com share IP numbers with classroomchallenge.com.

Name Servers

classroomchallenge.com's delegation is to two name servers this-domain-for-sale.com and ns.buydomains.com.

classroomchallenge.com shares the same name server configuration as other domains, such as championtournaments.com, waterrecreation.com, barbwire.net, ivensphotography.com and onlinehandbook.com.

classroomchallenge.com shares name servers with other domains to at least some extent, for instance autodrills.com and snowballshootout.com.

Host names with one IP number: this-domain-for-sale.com and ns.buydomains.com point to 52.20.26.87.

classroomchallenge.com - robtex.com