oldcourse.com - dns.ninja
oldcourse.com
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1784714192 | ||||||
Same first word
oldcourse.co.uk |
oldcourse.info |
oldcourse.com |
Similar names
DNS History
10 records (9 active, 1 former)
●NSns25.domaincontrol.com2015-06-14 → 2026-07-22 · 2 obs
● 2026-07-22 10:12:38
●NSns26.domaincontrol.com2015-06-14 → 2026-07-22 · 2 obs
● 2026-07-22 10:12:38
●MXalt1.aspmx.l.google.com2015-06-14 → 2026-07-22 · 2 obs
● 2026-07-22 10:12:38
●MXalt2.aspmx.l.google.com2015-06-14 → 2026-07-22 · 2 obs
● 2026-07-22 10:12:38
●MXaspmx.l.google.com2015-06-14 → 2026-07-22 · 2 obs
● 2026-07-22 10:12:38
●MXaspmx2.googlemail.com2015-06-14 → 2026-07-22 · 2 obs
● 2026-07-22 10:12:38
●MXaspmx3.googlemail.com2015-06-14 → 2026-07-22 · 2 obs
● 2026-07-22 10:12:38
●A15.197.148.332026-06-11 → 2026-07-22 · 3 obs
● 2026-06-11 12:58:16
● 2026-07-22 10:12:38
●A3.33.130.1902026-06-11 → 2026-07-22 · 3 obs
● 2026-06-11 12:58:16
● 2026-07-22 10:12:38
○A50.63.202.372015-06-14 → 2018-07-10 · 4 obs
● 2018-07-10 07:30:24
○ 2026-06-11 12:58:16
○ 2026-07-22 10:12:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| oldcourse.com | ns25.domaincontrol.com, ns26.domaincontrol.com | 4 records |
✅ Authoritative Response
Server:97.74.102.13
NS records: ns25.domaincontrol.com, ns26.domaincontrol.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for oldcourse.com (unsigned zone)
⏱️ Timing
Total: 191ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 3.33.130.190, 15.197.148.33 |
| NS | 2 | ns25.domaincontrol.com, ns26.domaincontrol.com |
| MX | 5 | alt1.aspmx.l.google.com (pri: 20), alt2.aspmx.l.google.com (pri: 30)... |
| SOA | 1 | ns25.domaincontrol.com dns.jomax.net |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns25.domaincontrol.com, ns25.domaincontrol.com, ns26.domaincontrol.com...)
Analysis
IP Addresses
oldcourse.com has two IP addresses: 3.33.130.190 and 15.197.148.33
mikediamondmusic.com, cookscloud.com, ssgrafica.com and two other host names share IP numbers with oldcourse.com.
Name Servers
oldcourse.com has two authoritative name servers — ns25.domaincontrol.com and ns26.domaincontrol.com.
oldcourse.com uses the same name servers as several other domains — among them pfcn.org, eleful.net, allyouneedisrub.com and two more.
Both ns25.domaincontrol.com and ns26.domaincontrol.com have two IP addresses each. ns25.domaincontrol.com resolves to 97.74.102.13 and 2603:5:2161::d; ns26.domaincontrol.com resolves to 173.201.70.13 and 2603:5:2261::d.
Mail Servers
Five mail servers handle oldcourse.com: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.
oldcourse.com has at least partial mail server overlap with other domains such as nextautobody.com, ns500765.ns500693.ns500734.ns500734.ns500734.ns500588.ns500588.ns500683.ns500632.ns500588.ns500632.ns500588.ns500588.ns500588.dtrkdll.com, ns500671.ns500742.ns500731.ns500671.ns500754.ns500742.ns500671.ns500678.ns500688.ns500688.ns500704.ns500666.ns500291.ns500131.lustychickser.com and two more.
These mail servers commonly co-occur with mail servers alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 others.
Hostnames that resolve to two IP addresses:
aspmx2.googlemail.com resolves to 108.177.123.26 and 2800:3f0:4003:c0f::1b.
aspmx3.googlemail.com resolves to 172.253.116.26 and 2a00:1450:400b:c02::1b.
aspmx.l.google.com resolves to 172.253.115.27 and 2607:f8b0:4004:c09::1b.
alt1.aspmx.l.google.com resolves to 108.177.123.27 and 2800:3f0:4003:c0f::1b.
alt2.aspmx.l.google.com resolves to 172.253.116.26 and 2a00:1450:400b:c02::1a.
The host names aspmx2.googlemail.com and alt1.aspmx.l.google.com both resolve to 2800:3f0:4003:c0f::1b IP addresses.
The host names aspmx3.googlemail.com and alt2.aspmx.l.google.com both resolve to 172.253.116.26 IP addresses.