`proexercises.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

Same first word

proexercises.com

DNS History

8 records (3 active, 5 former)

●NSns.buydomains.com2018-06-26 → 2026-03-23 · 3 obs

○ 2017-02-09 12:20:16
● 2018-06-26 08:26:22
● 2026-03-23 19:20:42

○NSns11.domaincontrol.com2015-11-29 → 2017-02-09 · 4 obs

● 2015-11-29 05:16:08
● 2017-02-09 12:20:16
○ 2018-06-26 08:26:22
○ 2026-03-23 19:20:42

○NSns12.domaincontrol.com2015-11-29 → 2017-02-09 · 4 obs

● 2015-11-29 05:16:08
● 2017-02-09 12:20:16
○ 2018-06-26 08:26:22
○ 2026-03-23 19:20:42

●NSthis-domain-for-sale.com2026-02-27 → 2026-03-23 · 3 obs

○ 2018-06-26 08:26:22
● 2026-02-27 17:48:56
● 2026-03-23 19:20:42

○MXmailstore1.secureserver.net2015-11-29 → 2017-02-09 · 4 obs

● 2015-11-29 05:16:08
● 2017-02-09 12:20:16
○ 2018-06-26 08:26:22
○ 2026-03-23 19:20:42

○MXsmtp.secureserver.net2015-11-29 → 2017-02-09 · 4 obs

● 2015-11-29 05:16:08
● 2017-02-09 12:20:16
○ 2018-06-26 08:26:22
○ 2026-03-23 19:20:42

●A207.148.248.1432018-06-26 → 2026-03-23 · 3 obs

○ 2017-02-09 12:20:16
● 2018-06-26 08:26:22
● 2026-03-23 19:20:42

○A50.63.202.362015-11-29 → 2017-02-09 · 4 obs

● 2015-11-29 05:16:08
● 2017-02-09 12:20:16
○ 2018-06-26 08:26:22
○ 2026-03-23 19:20:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
proexercises.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 proexercises.com (unsigned zone)

⏱️ Timing

Total: 140ms | 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

IP Addresses

proexercises.com resolves to a single IP address: 207.148.248.143.

Other host names including www.everydaysituations.com, jemracing.com, smul.net, bridalqueen.com and sandbites.com share IP numbers with proexercises.com.

Name Servers

proexercises.com's delegation uses two name servers, this-domain-for-sale.com and ns.buydomains.com.

proexercises.com shares the same name server setup as other domains, for example fitfax.com, telcomit.com, slidingbaskets.com, homedistinct.com and romanski.net.

proexercises.com at least partially shares name servers with other domains; for instance reservetaxi.com.

Host names with a single IP:

- this-domain-for-sale.com points to 52.20.26.87

- ns.buydomains.com points to 52.20.26.87

Host names that point to 52.20.26.87: this-domain-for-sale.com and ns.buydomains.com

proexercises.com - robtex.com