istudyom.ca - robtex.com
istudyom.ca
| 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.comhostmaster@mheducation.com 2014-12-04 #17 | ||||||
ca
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | prd-czp-05.corp.cira.ca ⭐ | ||||||
| NS | any.ca-servers.ca | ||||||
| NS | c.ca-servers.ca | ||||||
| NS | d.ca-servers.ca | ||||||
| NS | j.ca-servers.ca | ||||||
| SOA | prd-czp-05.corp.cira.caadmin-dns@cira.ca serial=2604241400 | ||||||
Same first word
Similar names
DNS History
11 records (9 active, 2 former)
●NSpdns85.ultradns.biz2015-06-17 → 2026-04-24 · 2 obs
● 2026-04-24 14:55:34
●NSpdns85.ultradns.com2015-06-17 → 2026-04-24 · 2 obs
● 2026-04-24 14:55:34
●NSpdns85.ultradns.net2015-06-17 → 2026-04-24 · 2 obs
● 2026-04-24 14:55:34
●NSpdns85.ultradns.org2015-06-17 → 2026-04-24 · 2 obs
● 2026-04-24 14:55:34
●MXcorp148mr3.mcgraw-hill.com2015-06-17 → 2026-04-24 · 2 obs
● 2026-04-24 14:55:34
●MXcorp148mr4.mcgraw-hill.com2015-06-17 → 2026-04-24 · 2 obs
● 2026-04-24 14:55:34
●MXnj12corpmr01.mcgraw-hill.com2015-06-17 → 2026-04-24 · 2 obs
● 2026-04-24 14:55:34
●MXnj12corpmr02.mcgraw-hill.com2015-06-17 → 2026-04-24 · 2 obs
● 2026-04-24 14:55:34
○A192.243.83.302015-06-17 → 2017-08-10 · 4 obs
● 2017-08-10 11:04:52
○ 2026-04-22 15:40:48
○ 2026-04-24 14:55:34
●A192.243.85.362026-04-22 → 2026-04-24 · 3 obs
● 2026-04-22 15:40:48
● 2026-04-24 14:55:34
○A192.243.93.452015-06-17 → 2017-08-10 · 4 obs
● 2017-08-10 11:04:52
○ 2026-04-22 15:40:48
○ 2026-04-24 14:55:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ca | c.ca-servers.ca, d.ca-servers.ca, j.ca-servers.ca, any.ca-servers.ca | - |
| istudyom.ca | pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net, pdns85.ultradns.org | - |
✅ Authoritative Response
Server:156.154.65.85
NS records: pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net, pdns85.ultradns.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for istudyom.ca (unsigned zone)
⏱️ Timing
Total: 482ms | 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 |
Analysis
IP Addresses
istudyom.ca points to IP number 192.243.85.36.
For instance, other host names istudymis.com, istudybusinessmath.com, connecteconomics.ca, istudymis.ca and istudycalculus.ca share IP numbers with istudyom.ca.
Name Servers
istudyom.ca is delegated to four name servers: pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net and pdns85.ultradns.org.
istudyom.ca shares name servers with other domains at least partially, for example joyanes.es, mhegc.com, mhstudyzone.com, mheclouds.com and 56.175.199.in-addr.arpa.
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
istudyom.ca is handled by four mail servers: corp148mr3.mcgraw-hill.com, corp148mr4.mcgraw-hill.com, nj12corpmr01.mcgraw-hill.com and nj12corpmr02.mcgraw-hill.com.
istudyom.ca shares mail servers with other domains at least partially; for instance istudyanthropology.com, wrightgroup.com, joyanes.es, standardandpoors.ae and istudyob.com.
these mail servers are commonly used alongside corp148mr6.mcgraw-hill.com and corp55wmr5.mcgraw-hill.com.