`knowledgetutors.com`

DNSSEC	⚠️ Not signed
A	207.148.248.143^{🇺🇸 EIG-29873207.148.248.0/24}
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=1774382122

Same first word

knowledgetutors.com

DNS History

8 records (3 active, 5 former)

●NSns.buydomains.com2026-02-27 → 2026-03-24 · 3 obs

○ 2018-01-01 11:37:42
● 2026-02-27 07:41:20
● 2026-03-24 19:59:44

○NSpdns07.domaincontrol.com2016-02-06 → 2016-11-25 · 4 obs

● 2016-02-06 16:44:00
● 2016-11-25 01:34:18
○ 2018-01-01 11:37:42
○ 2026-03-24 19:59:44

○NSpdns08.domaincontrol.com2016-02-06 → 2016-11-25 · 4 obs

● 2016-02-06 16:44:00
● 2016-11-25 01:34:18
○ 2018-01-01 11:37:42
○ 2026-03-24 19:59:44

●NSthis-domain-for-sale.com2026-02-27 → 2026-03-24 · 3 obs

○ 2018-01-01 11:37:42
● 2026-02-27 07:41:20
● 2026-03-24 19:59:44

○MXmailstore1.secureserver.net2016-02-06 → 2016-11-25 · 4 obs

● 2016-02-06 16:44:00
● 2016-11-25 01:34:18
○ 2018-01-01 11:37:42
○ 2026-03-24 19:59:44

○MXsmtp.secureserver.net2016-02-06 → 2016-11-25 · 4 obs

● 2016-02-06 16:44:00
● 2016-11-25 01:34:18
○ 2018-01-01 11:37:42
○ 2026-03-24 19:59:44

●A207.148.248.1432026-02-27 → 2026-03-24 · 3 obs

○ 2018-01-01 11:37:42
● 2026-02-27 07:41:20
● 2026-03-24 19:59:44

○A23.229.143.402016-02-06 → 2016-11-25 · 4 obs

● 2016-02-06 16:44:00
● 2016-11-25 01:34:18
○ 2018-01-01 11:37:42
○ 2026-03-24 19:59:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net...	-
knowledgetutors.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 knowledgetutors.com (unsigned zone)

⏱️ Timing

Total: 79ms | 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

knowledgetutors.com points to a single IP: 207.148.248.143.

Other host names, for instance matchprofile.com, rhythmsyndicate.com, sharpphotographers.com, kaprial.com and formmails.com share IP numbers with knowledgetutors.com.

Name Servers

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

knowledgetutors.com shares the same name server configuration as other domains, such as retroaccess.com, jmmco.com, staffshopper.com, nortongreen.com and bookshipments.com.

knowledgetutors.com shares name servers with other domains at least partially, for example roptim.com.

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

knowledgetutors.com - robtex.com