`istudentedition.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`
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=1777068001

Same first word

istudentedition.com

istudentedition.ca

DNS History

8 records (5 active, 3 former)

●NSpdns85.ultradns.biz2015-06-23 → 2026-04-24 · 2 obs

● 2015-06-23 18:53:48
● 2026-04-24 22:20:42

●NSpdns85.ultradns.com2015-06-23 → 2026-04-24 · 2 obs

● 2015-06-23 18:53:48
● 2026-04-24 22:20:42

●NSpdns85.ultradns.net2015-06-23 → 2026-04-24 · 2 obs

● 2015-06-23 18:53:48
● 2026-04-24 22:20:42

●NSpdns85.ultradns.org2015-06-23 → 2026-04-24 · 2 obs

● 2015-06-23 18:53:48
● 2026-04-24 22:20:42

○A192.243.83.302015-06-23 → 2017-02-12 · 4 obs

● 2015-06-23 18:53:48
● 2017-02-12 22:41:48
○ 2019-03-10 23:50:36
○ 2026-04-24 22:20:42

●A192.243.85.362026-04-23 → 2026-04-24 · 3 obs

○ 2019-03-10 23:50:36
● 2026-04-23 19:53:58
● 2026-04-24 22:20:42

○A192.243.93.452015-06-23 → 2017-02-12 · 4 obs

● 2015-06-23 18:53:48
● 2017-02-12 22:41:48
○ 2019-03-10 23:50:36
○ 2026-04-24 22:20:42

○A192.243.94.1882019-03-10 → 2019-03-10 · 4 obs

○ 2017-02-12 22:41:48
● 2019-03-10 23:50:36
○ 2026-04-23 19:53:58
○ 2026-04-24 22:20:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	d.gtld-servers.net, l.gtld-servers.net, e.gtld-servers.net, j.gtld-servers.net...	-
istudentedition.com	pdns85.ultradns.net, pdns85.ultradns.com, pdns85.ultradns.biz, pdns85.ultradns.org	2 records

✅ Authoritative Response

Server:156.154.67.85

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for istudentedition.com (unsigned zone)

⏱️ Timing

Total: 654ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.243.85.36`
NS	4	`pdns85.ultradns.biz, pdns85.ultradns.com...`
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

istudentedition.com points to IP number 192.243.85.36.

For instance, other host names istudyhealthpsychology.ca, mcgrawhill.ca, istudysociology.com, istudymarketing.ca and mcgraw-hillryerson.com share IP numbers with istudentedition.com.

Name Servers

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

istudentedition.com shares name servers with other domains at least partially, for example genchemzone.com, mhelabday.com, reveal-math.com, mhpharmacytech.com and 1everydaymath30.info.

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

istudentedition.com - robtex.com