cdextlibrary.org - robtex.com
cdextlibrary.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 128.210.7.100🇺🇸 ASN17128.210.0.0/16 Purdue University | ||||||
| PTR | alumni.pnw.edu | ||||||
| PTR | wp.www.purdue.edu | ||||||
| NS | ns3.purdue.edu ⭐ | ||||||
| A | 2001:18e8:800:200::a🇺🇸 ASN172001:18e8:800::/44 Purdue University | ||||||
| PTR | ns3.purdue.edu | ||||||
| A | 128.210.224.226🇺🇸 ASN17128.210.0.0/16 Purdue University | ||||||
| PTR | ns3.purdue.edu | ||||||
| NS | ns4.purdue.edu | ||||||
| A | 2001:18e8:800:201::a🇺🇸 ASN172001:18e8:800::/44 Purdue University | ||||||
| PTR | ns4.purdue.edu | ||||||
| A | 128.210.224.234🇺🇸 ASN17128.210.0.0/16 Purdue University | ||||||
| PTR | ns4.purdue.edu | ||||||
| NS | ns5.purdue.edu | ||||||
| A | 20.241.160.48🇺🇸 Microsoft20.192.0.0/10 | ||||||
| TXT | Contacts=Shelly Surber,surber@purdue.edu;Michael Wilcox,wilcox16@purdue.edu | ||||||
| TXT | 8A5F1F81F4DB5AEE8CC88AC8F62BDCE3 | ||||||
| SOA | ns3.purdue.eduhostmaster@purdue.edu serial=799542920 | ||||||
org
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation | ||||||
| NS | a2.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | b0.org.afilias-nst.org | ||||||
| NS | b2.org.afilias-nst.org | ||||||
| NS | c0.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | d0.org.afilias-nst.org | ||||||
| SOA | a0.org.afilias-nst.infohostmaster@donuts.email serial=1785322822 | ||||||
Same first word
cdextlibrary.org |
DNS History
4 records (4 active, 0 former)
●NSns3.purdue.edu2026-02-17 → 2026-07-29 · 2 obs
● 2026-07-29 11:29:24
●NSns4.purdue.edu2026-02-17 → 2026-07-29 · 2 obs
● 2026-07-29 11:29:24
●NSns5.purdue.edu2026-02-17 → 2026-07-29 · 2 obs
● 2026-07-29 11:29:24
●A128.210.7.1002026-02-17 → 2026-07-29 · 2 obs
● 2026-07-29 11:29:24
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org | - |
| cdextlibrary.org | ns3.purdue.edu, ns5.purdue.edu, ns4.purdue.edu | - |
✅ Authoritative Response
Server:128.210.224.234
NS records: ns3.purdue.edu, ns5.purdue.edu, ns4.purdue.edu
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cdextlibrary.org (unsigned zone)
⏱️ Timing
Total: 670ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 128.210.7.100 |
| NS | 3 | ns4.purdue.edu, ns3.purdue.edu... |
| TXT | 2 | Contacts=Shelly Surber,surber@purdue.edu, 8A5F1F81F4DB5AEE8CC88AC8F62BDCE3 |
| SOA | 1 | ns3.purdue.edu hostmaster.purdue.edu |
Analysis
IP Addresses
cdextlibrary.org points to a single IP number: 128.210.7.100.
Additional host names — iwrrc.org, shakespearestheaterscape.org, indiana-arborist.org and two others — share IP numbers with cdextlibrary.org.
Name Servers
cdextlibrary.org is delegated to three name servers: ns3.purdue.edu, ns4.purdue.edu and ns5.purdue.edu.
There is at least partial name server overlap between cdextlibrary.org and other domains — csds.purdue.edu, e-enterprise.purdue.edu, bidc.purdue.edu and two more among them.
These name servers are frequently paired with the name servers pendragon.cs.purdue.edu, harbor.ecn.purdue.edu, ns1.rice.edu and two others.
Host names with two IP numbers:
ns3.purdue.edu points to 128.210.224.226 and 2001:18e8:800:200::a.
ns4.purdue.edu points to 128.210.224.234 and 2001:18e8:800:201::a.
Host names pointing to a single IP address:
ns5.purdue.edu points to 20.241.160.48.