courseoptions.com - robtex.com
courseoptions.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=1785897904 | ||||||
Same first word
courseoptions.com |
Similar names
DNS History
8 records (6 active, 2 former)
●NSns-1295.awsdns-33.org2026-07-07 → 2026-08-05 · 2 obs
● 2026-08-05 02:51:42
●NSns-1783.awsdns-30.co.uk2026-07-07 → 2026-08-05 · 2 obs
● 2026-08-05 02:51:42
●NSns-54.awsdns-06.com2026-07-07 → 2026-08-05 · 2 obs
● 2026-08-05 02:51:42
●NSns-989.awsdns-59.net2026-07-07 → 2026-08-05 · 2 obs
● 2026-08-05 02:51:42
●MXsmtp.secureserver.net2026-07-07 → 2026-08-05 · 2 obs
● 2026-08-05 02:51:42
●A13.200.227.232026-07-07 → 2026-08-05 · 3 obs
● 2026-07-07 10:05:48
● 2026-08-05 02:51:42
○A207.148.248.1432015-11-17 → 2017-12-02 · 5 obs
● 2015-11-17 11:05:36
● 2017-12-02 18:53:00
○ 2026-07-07 10:05:48
○ 2026-08-05 02:51:42
○A66.151.181.492015-06-10 → 2015-06-10 · 4 obs
● 2015-06-10 17:04:50
○ 2015-11-17 11:05:36
○ 2026-08-05 02:51:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | i.gtld-servers.net, k.gtld-servers.net, e.gtld-servers.net, b.gtld-servers.net... | - |
| courseoptions.com | ns-54.awsdns-06.com, ns-989.awsdns-59.net, ns-1783.awsdns-30.co.uk, ns-1295.awsdns-33.org | 2 records |
✅ Authoritative Response
Server:205.251.197.15
NS records: ns-54.awsdns-06.com, ns-989.awsdns-59.net, ns-1783.awsdns-30.co.uk, ns-1295.awsdns-33.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for courseoptions.com (unsigned zone)
⏱️ Timing
Total: 350ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 13.200.227.23 |
| NS | 4 | ns-1295.awsdns-33.org, ns-1783.awsdns-30.co.uk... |
| MX | 1 | smtp.secureserver.net (pri: 10) |
| TXT | 2 | google-site-verification=jmWWxfgUXdcSv-D, v=spf1 include:secureserver.net -all |
| SOA | 1 | ns-54.awsdns-06.com awsdns-hostmaster.am |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns-54.awsdns-06.com, ns-54.awsdns-06.com)
Analysis
IP Addresses
courseoptions.com resolves to one IP address: 13.200.227.23.
Name Servers
The authoritative name servers for courseoptions.com are ns-54.awsdns-06.com, ns-989.awsdns-59.net, ns-1295.awsdns-33.org and ns-1783.awsdns-30.co.uk.
The name servers of courseoptions.com overlap at least partially with those of other domains — among them neverboredinc.com, d99978kffv38a.cloudfront.net, eickler.com and two more.
Each of the four hosts ns-54.awsdns-06.com, ns-989.awsdns-59.net, ns-1295.awsdns-33.org and ns-1783.awsdns-30.co.uk has two IP addresses. ns-54.awsdns-06.com points to 205.251.192.54 and 2600:9000:5300:3600::1. ns-989.awsdns-59.net points to 205.251.195.221 and 2600:9000:5303:dd00::1. ns-1295.awsdns-33.org points to 205.251.197.15 and 2600:9000:5305:f00::1. ns-1783.awsdns-30.co.uk points to 205.251.198.247 and 2600:9000:5306:f700::1.
Mail Servers
Mail for courseoptions.com is handled by a single mail server, smtp.secureserver.net.
courseoptions.com uses an identical mail server configuration to several other domains — among them datatuning.net, mandgworld.org, egproc.org and two more.
courseoptions.com has at least partial mail server overlap with other domains such as vrguides.com, philmarshall.co.uk, kennethbonner.com and two more.
This set of mail servers commonly appears together with the mail servers mailstore1.secureserver.net.
smtp.secureserver.net points to three IP addresses: 216.69.141.71, 216.69.141.84 and 216.69.141.113.