mcgrawhill.tw - robtex.com

mcgrawhill.tw

DNSSEC⚠️ Not signed
NSpdns85.ultradns.biz ⚠️ Not in zone NS records
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.com ⚠️ Not in zone NS records
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.net ⚠️ Not in zone NS records
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 ⚠️ Not in zone NS records
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

tw

DNSSEC🔒 Signed (DS record present)
NSa.dns.tw ⭐
NSanytld.apnic.net ⚠️ Not in parent delegation
NSb.dns.tw
NSc.dns.tw
NSd.dns.tw
NSe.dns.tw
NSf.dns.tw
NSg.dns.tw
NSh.dns.tw
SOAa.dns.twsnw@twnic.net.tw serial=2011004766

Same first word

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mcgrawhill.io
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mcgrawhill.co.at
mcgrawhill.me
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mcgrawhill.pr
mcgrawhill.net

DNS History

4 records (4 active, 0 former)

NSpdns85.ultradns.bizpdns85.ultradns.compdns85.ultradns.netpdns85.ultradns.org
●NSpdns85.ultradns.biz2026-04-23 → 2026-04-25 · 2 obs
● 2026-04-23 11:13:20
● 2026-04-25 00:03:30
●NSpdns85.ultradns.com2026-04-23 → 2026-04-25 · 2 obs
● 2026-04-23 11:13:20
● 2026-04-25 00:03:30
●NSpdns85.ultradns.net2026-04-23 → 2026-04-25 · 2 obs
● 2026-04-23 11:13:20
● 2026-04-25 00:03:30
●NSpdns85.ultradns.org2026-04-23 → 2026-04-25 · 2 obs
● 2026-04-23 11:13:20
● 2026-04-25 00:03:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
twe.dns.tw, f.dns.tw, a.dns.tw, d.dns.tw...-
mcgrawhill.twpdns85.ultradns.net, pdns85.ultradns.com, pdns85.ultradns.biz, pdns85.ultradns.org-

✅ Authoritative Response

Server:2001:502:4612::79

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mcgrawhill.tw (unsigned zone)

⏱️ Timing

Total: 3050ms | Queries: -

📄 Records

TypeCountSample Data

Analysis

Name Servers

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

mcgrawhill.tw at least partially shares name servers with other domains such as mathematicsintervention.com, mhbenziger.com, connectgeology.com, mhprofessionaldevelopment.com and connectgeneralchemistry.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