istudymis.com - robtex.com

istudymis.com

DNSSEC⚠️ Not signed
A192.243.85.36🇺🇸 F5192.243.85.0/24 hosted
NSpdns85.ultradns.com ⭐
A2001:502:f3ff::79🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar
PTRpdns85.ultradns.com
A156.154.64.85🇺🇸 MAINT-ID-12008156.154.64.0/24 Neustar
PTRpdns85.ultradns.com
NSpdns85.ultradns.biz
A2610:a1:1015::79🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar
PTRpdns85.ultradns.biz
A156.154.66.85🇺🇸 MAINT-ID-12008156.154.66.0/24 Neustar
PTRpdns85.ultradns.biz
NSpdns85.ultradns.net
A2610:a1:1014::79🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar
PTRpdns85.ultradns.net
A156.154.65.85🇺🇸 MAINT-ID-12008156.154.65.0/24 Neustar
PTRpdns85.ultradns.net
NSpdns85.ultradns.org
A2001:502:4612::79🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar
PTRpdns85.ultradns.org
A156.154.67.85🇺🇸 MAINT-ID-12008156.154.67.0/24 Neustar
PTRpdns85.ultradns.org
MXcorp148mr3.mcgraw-hill.com ⭐
MXcorp148mr4.mcgraw-hill.com ⭐
MXnj12corpmr01.mcgraw-hill.com ⭐
MXnj12corpmr02.mcgraw-hill.com(30)
TXTv=spf1 mx -all
SOApdns85.ultradns.comhostmaster@mheducation.com 2014-06-30 #16

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1777075381

Same first word

istudymis.com
istudymis.ca

DNS History

11 records (9 active, 2 former)

20162017201820192020202120222023202420252026NSpdns85.ultradns.bizpdns85.ultradns.compdns85.ultradns.netpdns85.ultradns.orgMXcorp148mr3.mcgraw-hill.comcorp148mr4.mcgraw-hill.comnj12corpmr01.mcgraw-hill.comnj12corpmr02.mcgraw-hill.comA192.243.85.36192.243.83.30192.243.93.45
●NSpdns85.ultradns.biz2015-05-18 → 2026-04-25 · 2 obs
● 2015-05-18 03:17:10
● 2026-04-25 00:17:40
●NSpdns85.ultradns.com2015-05-18 → 2026-04-25 · 2 obs
● 2015-05-18 03:17:10
● 2026-04-25 00:17:40
●NSpdns85.ultradns.net2015-05-18 → 2026-04-25 · 2 obs
● 2015-05-18 03:17:10
● 2026-04-25 00:17:40
●NSpdns85.ultradns.org2015-05-18 → 2026-04-25 · 2 obs
● 2015-05-18 03:17:10
● 2026-04-25 00:17:40
●MXcorp148mr3.mcgraw-hill.com2015-05-18 → 2026-04-25 · 2 obs
● 2015-05-18 03:17:10
● 2026-04-25 00:17:40
●MXcorp148mr4.mcgraw-hill.com2015-05-18 → 2026-04-25 · 2 obs
● 2015-05-18 03:17:10
● 2026-04-25 00:17:40
●MXnj12corpmr01.mcgraw-hill.com2015-05-18 → 2026-04-25 · 2 obs
● 2015-05-18 03:17:10
● 2026-04-25 00:17:40
●MXnj12corpmr02.mcgraw-hill.com2015-05-18 → 2026-04-25 · 2 obs
● 2015-05-18 03:17:10
● 2026-04-25 00:17:40
○A192.243.83.302015-05-18 → 2018-01-07 · 4 obs
● 2015-05-18 03:17:10
● 2018-01-07 06:28:46
○ 2026-04-23 04:21:54
○ 2026-04-25 00:17:40
●A192.243.85.362026-04-23 → 2026-04-25 · 3 obs
○ 2018-01-07 06:28:46
● 2026-04-23 04:21:54
● 2026-04-25 00:17:40
○A192.243.93.452015-05-18 → 2018-01-07 · 4 obs
● 2015-05-18 03:17:10
● 2018-01-07 06:28:46
○ 2026-04-23 04:21:54
○ 2026-04-25 00:17:40

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comc.gtld-servers.net, l.gtld-servers.net, a.gtld-servers.net, d.gtld-servers.net...-
istudymis.compdns85.ultradns.net, pdns85.ultradns.com, pdns85.ultradns.biz, pdns85.ultradns.org2 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 istudymis.com (unsigned zone)

⏱️ Timing

Total: 265ms | Queries: -

📄 Records

TypeCountSample Data
A1192.243.85.36
NS4pdns85.ultradns.biz, pdns85.ultradns.com...
MX4corp148mr3.mcgraw-hill.com (pri: 20), corp148mr4.mcgraw-hill.com (pri: 20)...
TXT1v=spf1 mx -all
SOA1pdns85.ultradns.com hostmaster.mheducati

📌 Glue Records Collected

Total: 2

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

Analysis

IP Addresses

istudymis.com points to a single IP number: 192.243.85.36.

other host names for instance istudybusinessmath.com, connecteconomics.ca, istudymis.ca, istudycalculus.ca and istudystatistics.com share IP numbers with istudymis.com.

Name Servers

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

istudymis.com at least partially shares name servers with other domains, for instance revealmath.com, aleksfacultydevelopment.net, mcgrawhillmed.com, adolescent-literacy.com and mcgrawhill.com.ph.

Host names with two IP numbers:

Host name pdns85.ultradns.biz points to: 2610:a1:1015::79 and 156.154.66.85.

Host name pdns85.ultradns.com points to: 2001:502:f3ff::79 and 156.154.64.85.

Host name pdns85.ultradns.net points to: 2610:a1:1014::79 and 156.154.65.85.

Host name pdns85.ultradns.org points to: 2001:502:4612::79 and 156.154.67.85.

Mail Servers

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

istudymis.com shares mail servers with other domains at least partially, including istudyfinance.ca, istudyaccounting.ca, standardandpoors.com.sg, deftechintl.com and istudymanagement.com.

these mail servers are often used with corp148mr6.mcgraw-hill.com and corp55wmr5.mcgraw-hill.com.