contbooks.com - robtex.com

contbooks.com

DNSSEC⚠️ Not signed
A192.243.83.86
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
TXTv=spf1 mx -all
SOApdns85.ultradns.comhostmaster@mheducation.com 2014-06-28 #15

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=1777141691

Same first word

contbooks.com

DNS History

11 records (5 active, 6 former)

2008201020122014201620182020202220242026NSpdns85.ultradns.bizpdns85.ultradns.compdns85.ultradns.netpdns85.ultradns.orgns1.eppg.comns1.mhedu.comns2.eppg.comns2.mhedu.comns3.mhedu.comA192.243.83.86205.142.55.167
○NSns1.eppg.com2007-10-31 → 2007-10-31 · 3 obs
● 2007-10-31 10:51:56
○ 2015-06-02 04:41:06
○ 2026-04-25 18:45:08
○NSns1.mhedu.com2007-10-31 → 2007-10-31 · 3 obs
● 2007-10-31 10:51:56
○ 2015-06-02 04:41:06
○ 2026-04-25 18:45:08
○NSns2.eppg.com2007-10-31 → 2007-10-31 · 3 obs
● 2007-10-31 10:51:56
○ 2015-06-02 04:41:06
○ 2026-04-25 18:45:08
○NSns2.mhedu.com2007-10-31 → 2007-10-31 · 3 obs
● 2007-10-31 10:51:56
○ 2015-06-02 04:41:06
○ 2026-04-25 18:45:08
○NSns3.mhedu.com2007-10-31 → 2007-10-31 · 3 obs
● 2007-10-31 10:51:56
○ 2015-06-02 04:41:06
○ 2026-04-25 18:45:08
●NSpdns85.ultradns.biz2015-06-02 → 2026-04-25 · 3 obs
○ 2007-10-31 10:51:56
● 2015-06-02 04:41:06
● 2026-04-25 18:45:08
●NSpdns85.ultradns.com2015-06-02 → 2026-04-25 · 3 obs
○ 2007-10-31 10:51:56
● 2015-06-02 04:41:06
● 2026-04-25 18:45:08
●NSpdns85.ultradns.net2015-06-02 → 2026-04-25 · 3 obs
○ 2007-10-31 10:51:56
● 2015-06-02 04:41:06
● 2026-04-25 18:45:08
●NSpdns85.ultradns.org2015-06-02 → 2026-04-25 · 3 obs
○ 2007-10-31 10:51:56
● 2015-06-02 04:41:06
● 2026-04-25 18:45:08
●A192.243.83.862015-06-02 → 2026-04-25 · 3 obs
○ 2007-10-31 10:51:56
● 2015-06-02 04:41:06
● 2026-04-25 18:45:08
○A205.142.55.1672007-10-31 → 2007-10-31 · 3 obs
● 2007-10-31 10:51:56
○ 2015-06-02 04:41:06
○ 2026-04-25 18:45:08

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comc.gtld-servers.net, e.gtld-servers.net, l.gtld-servers.net, i.gtld-servers.net...-
contbooks.compdns85.ultradns.net, pdns85.ultradns.com, pdns85.ultradns.biz, pdns85.ultradns.org2 records

✅ Authoritative Response

Server:156.154.65.85

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for contbooks.com (unsigned zone)

⏱️ Timing

Total: 592ms | Queries: -

📄 Records

TypeCountSample Data
A1192.243.83.86
NS4pdns85.ultradns.biz, pdns85.ultradns.com...
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

contbooks.com points to a single IP address: 192.243.83.86.

Other host names such as www.ntc-cb.com, ntc-contemporary.com, ntclw.com, ntc-cb.com and ntc-contemporaryed.com share IP numbers with contbooks.com.

Name Servers

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

At least part of the name servers for contbooks.com are shared with other domains, for instance mcgrawhilleducationblog.com, inquiryintochemistry.com, myopencourt.com, mcgraw-hill-ryerson.org and mhrln.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