`istudystatistics.com`

DNSSEC	⚠️ Not signed
A	192.243.85.36^{🇺🇸 F5192.243.85.0/24 hosted}
NS	`pdns85.ultradns.com` ⭐
		A	2001:502:f3ff::79^{🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar}
			PTR	`pdns85.ultradns.com`
		A	156.154.64.85^{🇺🇸 MAINT-ID-12008156.154.64.0/24 Neustar}
			PTR	`pdns85.ultradns.com`
NS	`pdns85.ultradns.biz`
		A	2610:a1:1015::79^{🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar}
			PTR	`pdns85.ultradns.biz`
		A	156.154.66.85^{🇺🇸 MAINT-ID-12008156.154.66.0/24 Neustar}
			PTR	`pdns85.ultradns.biz`
NS	`pdns85.ultradns.net`
		A	2610:a1:1014::79^{🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar}
			PTR	`pdns85.ultradns.net`
		A	156.154.65.85^{🇺🇸 MAINT-ID-12008156.154.65.0/24 Neustar}
			PTR	`pdns85.ultradns.net`
NS	`pdns85.ultradns.org`
		A	2001:502:4612::79^{🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar}
			PTR	`pdns85.ultradns.org`
		A	156.154.67.85^{🇺🇸 MAINT-ID-12008156.154.67.0/24 Neustar}
			PTR	`pdns85.ultradns.org`
MX	`corp148mr3.mcgraw-hill.com` ⭐
MX	`corp148mr4.mcgraw-hill.com` ⭐
MX	`nj12corpmr01.mcgraw-hill.com` ⭐
MX	`nj12corpmr02.mcgraw-hill.com`⁽³⁰⁾
TXT	`v=spf1 mx -all`
SOA	`pdns85.ultradns.com`hostmaster@mheducation.com 2014-06-30 #17

`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=1777064326

Same first word

istudystatistics.com

istudystatistics.ca

DNS History

12 records (9 active, 3 former)

●NSpdns85.ultradns.biz2015-07-11 → 2026-04-24 · 2 obs

● 2015-07-11 01:16:26
● 2026-04-24 21:13:54

●NSpdns85.ultradns.com2015-07-11 → 2026-04-24 · 2 obs

● 2015-07-11 01:16:26
● 2026-04-24 21:13:54

●NSpdns85.ultradns.net2015-07-11 → 2026-04-24 · 2 obs

● 2015-07-11 01:16:26
● 2026-04-24 21:13:54

●NSpdns85.ultradns.org2015-07-11 → 2026-04-24 · 2 obs

● 2015-07-11 01:16:26
● 2026-04-24 21:13:54

●MXcorp148mr3.mcgraw-hill.com2015-07-11 → 2026-04-24 · 2 obs

● 2015-07-11 01:16:26
● 2026-04-24 21:13:54

●MXcorp148mr4.mcgraw-hill.com2015-07-11 → 2026-04-24 · 2 obs

● 2015-07-11 01:16:26
● 2026-04-24 21:13:54

●MXnj12corpmr01.mcgraw-hill.com2015-07-11 → 2026-04-24 · 2 obs

● 2015-07-11 01:16:26
● 2026-04-24 21:13:54

●MXnj12corpmr02.mcgraw-hill.com2015-07-11 → 2026-04-24 · 2 obs

● 2015-07-11 01:16:26
● 2026-04-24 21:13:54

○A192.243.83.302015-07-11 → 2017-04-08 · 4 obs

● 2015-07-11 01:16:26
● 2017-04-08 08:29:58
○ 2020-04-01 23:13:26
○ 2026-04-24 21:13:54

●A192.243.85.362026-04-22 → 2026-04-24 · 3 obs

○ 2020-04-01 23:13:26
● 2026-04-22 18:16:10
● 2026-04-24 21:13:54

○A192.243.93.452015-07-11 → 2017-04-08 · 4 obs

● 2015-07-11 01:16:26
● 2017-04-08 08:29:58
○ 2020-04-01 23:13:26
○ 2026-04-24 21:13:54

○A192.243.94.1882020-04-01 → 2020-04-01 · 4 obs

○ 2017-04-08 08:29:58
● 2020-04-01 23:13:26
○ 2026-04-22 18:16:10
○ 2026-04-24 21:13:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
istudystatistics.com	pdns85.ultradns.net, pdns85.ultradns.com, pdns85.ultradns.biz, pdns85.ultradns.org	2 records

✅ Authoritative Response

Server:156.154.66.85

NS records: pdns85.ultradns.net, pdns85.ultradns.com, pdns85.ultradns.biz, pdns85.ultradns.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for istudystatistics.com (unsigned zone)

⏱️ Timing

Total: 2504ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.243.85.36`
NS	4	`pdns85.ultradns.biz, pdns85.ultradns.com...`
MX	4	`corp148mr3.mcgraw-hill.com (pri: 20), corp148mr4.mcgraw-hill.com (pri: 20)...`
TXT	1	`v=spf1 mx -all`
SOA	1	`pdns85.ultradns.com hostmaster.mheducati`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (pdns85.ultradns.com, pdns85.ultradns.com)

Analysis

IP Addresses

istudystatistics.com resolves to one IP number: 192.243.85.36.

other host names including istudyfrench.ca, istudypersonalhealth.ca, istudysocialpsychology.ca, istudyaccounting.com and istudybuscomm.com share IP numbers with istudystatistics.com.

Name Servers

istudystatistics.com is delegated to four name servers: pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net and pdns85.ultradns.org.

istudystatistics.com at least partially shares name servers with other domains, for instance mhinvestor.com, istudycriminology.ca, mhprepplus.com, istudychemistry.com and connectengineering.com.

Host names with two IP numbers:

pdns85.ultradns.biz points to 2610:a1:1015::79 and 156.154.66.85; pdns85.ultradns.com points to 2001:502:f3ff::79 and 156.154.64.85; pdns85.ultradns.net points to 2610:a1:1014::79 and 156.154.65.85; pdns85.ultradns.org points to 2001:502:4612::79 and 156.154.67.85.

Mail Servers

Four mail servers handle istudystatistics.com: corp148mr3.mcgraw-hill.com, corp148mr4.mcgraw-hill.com, nj12corpmr01.mcgraw-hill.com and nj12corpmr02.mcgraw-hill.com.

istudystatistics.com shares some mail servers with other domains, at least partially, for instance istudybuscomm.com, istudypoliticalscience.ca, standardandpoors.eu, istudycriminology.ca and istudychemistry.com.

These mail servers are commonly used alongside corp148mr6.mcgraw-hill.com and corp55wmr5.mcgraw-hill.com.

istudystatistics.com - robtex.com