mcgrawhill.pr - robtex.com

mcgrawhill.pr

DNSSEC⚠️ Not signed
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 -all
SOApdns85.ultradns.comhostmaster@mheducation.com 2019-10-10 #9

pr

DNSSEC🔒 Signed (DS record present)
NSa.lactld.org ⭐
NSa0.pr.afilias-nst.info
NSa2.pr.afilias-nst.info
NSb0.pr.afilias-nst.org
NSb2.pr.afilias-nst.org
NSc0.pr.afilias-nst.info
NSd0.pr.afilias-nst.org
NSpr-dns.denic.de
SOAa.lactld.orghostmaster@donuts.email serial=1777077663

Same first word

mcgrawhill.education
mcgrawhill.com.ph
mcgrawhill.be
mcgrawhill.com.pr
mcgrawhill.ag
mcgrawhill.co.il
mcgrawhill.dk
mcgrawhill.gen.in
mcgrawhill.com.pe
mcgrawhill.eu
mcgrawhill.tv
mcgrawhill.cn
mcgrawhill.co.at
mcgrawhill.me
mcgrawhill.co.uk
mcgrawhill.com
mcgrawhill.pr
mcgrawhill.net
mcgrawhill.us
mcgrawhill.ie
mcgrawhill.mobi
mcgrawhill.it
mcgrawhill.mx
mcgrawhill.fr
mcgrawhill.tw
mcgrawhill.sucks
mcgrawhill.org
mcgrawhill.cx
mcgrawhill.com.ru
mcgrawhill.io
mcgrawhill.ae
mcgrawhill.ca
mcgrawhill.ph
mcgrawhill.biz
mcgrawhill.app
mcgrawhill.cc

DNS History

4 records (4 active, 0 former)

NSpdns85.ultradns.bizpdns85.ultradns.compdns85.ultradns.netpdns85.ultradns.org
●NSpdns85.ultradns.biz2026-04-22 → 2026-04-25 · 2 obs
● 2026-04-22 09:54:04
● 2026-04-25 00:48:14
●NSpdns85.ultradns.com2026-04-22 → 2026-04-25 · 2 obs
● 2026-04-22 09:54:04
● 2026-04-25 00:48:14
●NSpdns85.ultradns.net2026-04-22 → 2026-04-25 · 2 obs
● 2026-04-22 09:54:04
● 2026-04-25 00:48:14
●NSpdns85.ultradns.org2026-04-22 → 2026-04-25 · 2 obs
● 2026-04-22 09:54:04
● 2026-04-25 00:48:14

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
prb2.pr.afilias-nst.org, c0.pr.afilias-nst.info, a.lactld.org, d0.pr.afilias-nst.org...16 records
mcgrawhill.prpdns85.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 mcgrawhill.pr (unsigned zone)

⏱️ Timing

Total: 989ms | Queries: -

📄 Records

TypeCountSample Data
NS4pdns85.ultradns.biz, pdns85.ultradns.com...
TXT1v=spf1 -all
SOA1pdns85.ultradns.com hostmaster.mheducati

📌 Glue Records Collected

Total: 16

Out-of-bailiwick: 16 (pr-dns.denic.de, d0.pr.afilias-nst.org, c0.pr.afilias-nst.info...)

Analysis

Name Servers

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

mcgrawhill.pr shares some name servers with other domains, for example mmhpr.net, ntcpg.com, mymcgrawhill.com, successincellmolec.com and mhrconnect.ca.

Host names with two IP numbers

Two IPs per host:

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