cortevaagriscience.com.tw - robtex.com
cortevaagriscience.com.tw
| DNSSEC | ⚠️ Not signed | ||||||
| NS | pdns216.ultradns.com ⭐ | ||||||
| A | 2001:502:f3ff::fc🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar | ||||||
| PTR | pdns216.ultradns.com | ||||||
| A | 156.154.64.216🇺🇸 MAINT-ID-12008156.154.64.0/24 Neustar | ||||||
| PTR | pdns216.ultradns.com | ||||||
| NS | pdns216.ultradns.biz | ||||||
| A | 2610:a1:1015::fc🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar | ||||||
| PTR | pdns216.ultradns.biz | ||||||
| A | 156.154.66.216🇺🇸 MAINT-ID-12008156.154.66.0/24 Neustar | ||||||
| PTR | pdns216.ultradns.biz | ||||||
| NS | pdns216.ultradns.net | ||||||
| A | 2610:a1:1014::fc🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar | ||||||
| PTR | pdns216.ultradns.net | ||||||
| A | 156.154.65.216🇺🇸 MAINT-ID-12008156.154.65.0/24 Neustar | ||||||
| PTR | pdns216.ultradns.net | ||||||
| NS | pdns216.ultradns.org | ||||||
| A | 2001:502:4612::fc🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar | ||||||
| PTR | pdns216.ultradns.org | ||||||
| A | 156.154.67.216🇺🇸 MAINT-ID-12008156.154.67.0/24 Neustar | ||||||
| PTR | pdns216.ultradns.org | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | pdns216.ultradns.comhostmaster@corteva.com 2024-01-10 #13 | ||||||
com.tw
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.twnic.net.tw ⭐ | ||||||
| NS | anytld.apnic.net | ||||||
| NS | b.twnic.net.tw | ||||||
| NS | c.twnic.net.tw | ||||||
| NS | d.twnic.net.tw | ||||||
| NS | e.twnic.net.tw | ||||||
| NS | f.twnic.net.tw | ||||||
| NS | g.twnic.net.tw | ||||||
| NS | h.dns.tw | ||||||
| NS | h.twnic.net.tw | ||||||
| SOA | a.twnic.net.twsnw@twnic.net.tw serial=2006378740 | ||||||
Same first word
DNS History
4 records (4 active, 0 former)
●NSpdns216.ultradns.biz2026-07-03 → 2026-07-04 · 2 obs
● 2026-07-04 14:36:40
●NSpdns216.ultradns.com2026-07-03 → 2026-07-04 · 2 obs
● 2026-07-04 14:36:40
●NSpdns216.ultradns.net2026-07-03 → 2026-07-04 · 2 obs
● 2026-07-04 14:36:40
●NSpdns216.ultradns.org2026-07-03 → 2026-07-04 · 2 obs
● 2026-07-04 14:36:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| tw | g.dns.tw, anytld.apnic.net, e.dns.tw, a.dns.tw... | 16 records |
| com.tw | e.twnic.net.tw, f.twnic.net.tw, a.twnic.net.tw, d.twnic.net.tw... | 17 records |
| cortevaagriscience.com.tw | pdns216.ultradns.com, pdns216.ultradns.org, pdns216.ultradns.biz, pdns216.ultradns.net | - |
✅ Authoritative Response
Server:156.154.65.216
NS records: pdns216.ultradns.com, pdns216.ultradns.org, pdns216.ultradns.biz, pdns216.ultradns.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cortevaagriscience.com.tw (unsigned zone)
⏱️ Timing
Total: 1347ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | pdns216.ultradns.biz, pdns216.ultradns.com... |
| TXT | 1 | v=spf1 -all |
| SOA | 1 | pdns216.ultradns.com hostmaster.corteva. |
📌 Glue Records Collected
Total: 33
In-bailiwick: 14 (g.dns.tw, e.dns.tw, e.dns.tw...)
Out-of-bailiwick: 19 (anytld.apnic.net, anytld.apnic.net, h.twnic.net.tw...)
Analysis
Name Servers
cortevaagriscience.com.tw has four authoritative name servers: pdns216.ultradns.biz, pdns216.ultradns.com, pdns216.ultradns.net and pdns216.ultradns.org.
The name servers of cortevaagriscience.com.tw overlap at least partially with those of other domains — among them corteva.taipei, corteva.fund, corteva.red and two more.
Each of the four hosts pdns216.ultradns.biz, pdns216.ultradns.com, pdns216.ultradns.net and pdns216.ultradns.org has two IP addresses. pdns216.ultradns.biz points to 156.154.66.216 and 2610:a1:1015::fc. pdns216.ultradns.com points to 156.154.64.216 and 2001:502:f3ff::fc. pdns216.ultradns.net points to 156.154.65.216 and 2610:a1:1014::fc. pdns216.ultradns.org points to 156.154.67.216 and 2001:502:4612::fc.