firstcourse.org - dns.ninja
firstcourse.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 13.248.169.48🇺🇸 Amazon13.248.160.0/20 | ||||||
| PTR | a904c694c05102f30.awsglobalaccelerator.com | ||||||
| A | 76.223.54.146🇺🇸 Amazon76.223.48.0/20 | ||||||
| NS | ns3.afternic.com ⭐ | ||||||
| A | 97.74.98.65🇺🇸 GODADDY-DNS97.74.98.0/23 | ||||||
| PTR | ns3.afternic.com | ||||||
| NS | ns4.afternic.com | ||||||
| A | 173.201.66.65🇺🇸 GODADDY-DNS173.201.66.0/23 | ||||||
| PTR | ns4.namefind.com | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | ns3.afternic.comdns@jomax.net 2025-10-01 #0 | ||||||
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=1786707359 | ||||||
Same first word
firstcourse.in |
firstcourse.fr |
firstcourse.net |
firstcourse.org |
Similar names
DNS History
9 records (4 active, 5 former)
○NSns27.domaincontrol.com2015-06-11 → 2017-09-07 · 4 obs
● 2017-09-07 07:15:28
○ 2026-02-16 17:27:22
○ 2026-08-14 11:59:56
○NSns28.domaincontrol.com2015-06-11 → 2017-09-07 · 4 obs
● 2017-09-07 07:15:28
○ 2026-02-16 17:27:22
○ 2026-08-14 11:59:56
●NSns3.afternic.com2026-02-16 → 2026-08-14 · 3 obs
● 2026-02-16 17:27:22
● 2026-08-14 11:59:56
●NSns4.afternic.com2026-02-16 → 2026-08-14 · 3 obs
● 2026-02-16 17:27:22
● 2026-08-14 11:59:56
○MXmailstore1.secureserver.net2015-06-11 → 2026-02-16 · 4 obs
● 2026-02-16 17:27:22
○ 2026-03-11 04:00:14
○ 2026-08-14 11:59:56
○MXsmtp.secureserver.net2015-06-11 → 2026-02-16 · 4 obs
● 2026-02-16 17:27:22
○ 2026-03-11 04:00:14
○ 2026-08-14 11:59:56
●A13.248.169.482026-02-16 → 2026-08-14 · 3 obs
● 2026-02-16 17:27:22
● 2026-08-14 11:59:56
○A199.34.228.1002015-06-11 → 2017-09-07 · 4 obs
● 2017-09-07 07:15:28
○ 2026-02-16 17:27:22
○ 2026-08-14 11:59:56
●A76.223.54.1462026-02-16 → 2026-08-14 · 3 obs
● 2026-02-16 17:27:22
● 2026-08-14 11:59:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org | - |
| firstcourse.org | ns3.afternic.com, ns4.afternic.com | - |
✅ Authoritative Response
Server:97.74.98.65
NS records: ns3.afternic.com, ns4.afternic.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for firstcourse.org (unsigned zone)
⏱️ Timing
Total: 194ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 13.248.169.48, 76.223.54.146 |
| NS | 2 | ns3.afternic.com, ns4.afternic.com |
| MX | 1 | . (pri: 0) |
| TXT | 1 | v=spf1 -all |
| SOA | 1 | ns3.afternic.com dns.jomax.net |
Analysis
IP Addresses
firstcourse.org resolves to the IP addresses 13.248.169.48 and 76.223.54.146
host-10.144-234-182.cable.dynamic.kbtelecom.net, kqfoundation.org, magazine.plus and two other host names share IP numbers with firstcourse.org.
Name Servers
DNS delegation for firstcourse.org points to two name servers: ns3.afternic.com and ns4.afternic.com.
firstcourse.org uses the same name servers as several other domains — among them mx.hotelbz.com, aquatik.com, omnivc.com and two more.
firstcourse.org partially shares its NS delegation with several other domains, including allhale.com, batteryex.com, abc.photos and two others.
ns3.afternic.com resolves to 97.74.98.65. ns4.afternic.com resolves to 173.201.66.65. Both host names point to a single IP number.