www.dukelearntoprogram.com - dns.ninja

www.dukelearntoprogram.com

CNAMEcgi.cs.duke.edu
CNAMEcgi-02.cs.duke.edu
DNSSEC⚠️ Not signed
A152.3.138.25🇺🇸 DUKE-INTERCHANGE152.3.0.0/16 Duke 152.3.0.0/16
PTRcgi-02.cs.duke.edu

dukelearntoprogram.com

DNSSEC🔒 Signed (DS record present)
A3.33.251.168🇺🇸 Amazon3.33.240.0/20
A15.197.225.128🇺🇸 Amazon15.197.224.0/20
NSns25.domaincontrol.com ⭐
NSns26.domaincontrol.com
MXsmtp.secureserver.net ⭐
MXmailstore1.secureserver.net(10)
SOAns25.domaincontrol.comdns@jomax.net 2026-06-04 #0

Same first word

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DNS History

4 records (1 active, 3 former)

2017201820192020202120222023202420252026A52.204.128.6054.86.244.217CNAMEcgi.cs.duke.edudukelearntoprogram.elasticbeanstalk.com
○A52.204.128.602016-12-28 → 2016-12-28 · 3 obs
● 2016-12-28 17:43:56
○ 2020-02-20 06:29:18
○ 2026-06-08 03:35:24
○A54.86.244.2172016-12-28 → 2016-12-28 · 3 obs
● 2016-12-28 17:43:56
○ 2020-02-20 06:29:18
○ 2026-06-08 03:35:24
●CNAMEcgi.cs.duke.edu2026-06-08 → 2026-06-08 · 2 obs
○ 2020-02-20 06:29:18
● 2026-06-08 03:35:24
○CNAMEdukelearntoprogram.elasticbeanstalk.com2016-12-28 → 2020-02-20 · 3 obs
● 2016-12-28 17:43:56
● 2020-02-20 06:29:18
○ 2026-06-08 03:35:24

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
come.gtld-servers.net, h.gtld-servers.net, k.gtld-servers.net, j.gtld-servers.net...-
dukelearntoprogram.comns25.domaincontrol.com, ns26.domaincontrol.com4 records

✅ Authoritative Response

Server:97.74.102.13

NS records: ns25.domaincontrol.com, ns26.domaincontrol.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 178ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1cgi.cs.duke.edu

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns25.domaincontrol.com, ns25.domaincontrol.com, ns26.domaincontrol.com...)

Analysis

IP Addresses

www.dukelearntoprogram.com directs to one IP number, which is 152.3.138.25.

There are other host names — cgi-02.cs.duke.edu among them — that share IP numbers with www.dukelearntoprogram.com.