coursecheck.com - robtex.com
coursecheck.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=1778415661 | ||||||
Same first word
coursecheck.org |
coursecheck.com |
Similar names
DNS History
11 records (8 active, 3 former)
●NSclarissa.ns.cloudflare.com2026-04-03 → 2026-05-10 · 3 obs
● 2026-04-03 10:30:04
● 2026-05-10 12:44:22
○NSns0.securepod.com2015-06-11 → 2017-05-17 · 5 obs
● 2015-06-11 06:51:30
● 2017-05-17 07:48:08
○ 2026-04-03 10:30:04
○ 2026-05-10 12:44:22
○NSns1.securepod.com2015-06-11 → 2017-05-17 · 5 obs
● 2015-06-11 06:51:30
● 2017-05-17 07:48:08
○ 2026-04-03 10:30:04
○ 2026-05-10 12:44:22
●NStoby.ns.cloudflare.com2026-04-03 → 2026-05-10 · 3 obs
● 2026-04-03 10:30:04
● 2026-05-10 12:44:22
●MXalt1.aspmx.l.google.com2015-06-11 → 2026-05-10 · 3 obs
● 2015-06-11 06:51:30
● 2026-05-10 12:44:22
●MXalt2.aspmx.l.google.com2015-06-11 → 2026-05-10 · 3 obs
● 2015-06-11 06:51:30
● 2026-05-10 12:44:22
●MXaspmx.l.google.com2015-06-11 → 2026-05-10 · 3 obs
● 2015-06-11 06:51:30
● 2026-05-10 12:44:22
●MXaspmx2.googlemail.com2015-06-11 → 2026-05-10 · 3 obs
● 2015-06-11 06:51:30
● 2026-05-10 12:44:22
●MXaspmx3.googlemail.com2015-06-11 → 2026-05-10 · 3 obs
● 2015-06-11 06:51:30
● 2026-05-10 12:44:22
●A20.90.134.292026-04-03 → 2026-05-10 · 3 obs
● 2026-04-03 10:30:04
● 2026-05-10 12:44:22
○A217.172.130.2412015-06-11 → 2017-05-17 · 5 obs
● 2015-06-11 06:51:30
● 2017-05-17 07:48:08
○ 2026-04-03 10:30:04
○ 2026-05-10 12:44:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, k.gtld-servers.net... | - |
| coursecheck.com | toby.ns.cloudflare.com, clarissa.ns.cloudflare.com | 12 records |
✅ Authoritative Response
Server:108.162.193.239
NS records: toby.ns.cloudflare.com, clarissa.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coursecheck.com (unsigned zone)
⏱️ Timing
Total: 565ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 20.90.134.29 |
| NS | 2 | clarissa.ns.cloudflare.com, toby.ns.cloudflare.com |
| MX | 5 | aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)... |
| TXT | 2 | google-site-verification=U87nVm5dywavnyO, v=spf1 mx ip4:217.172.130.241/32 include |
| SOA | 1 | clarissa.ns.cloudflare.com dns.cloudflar |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (toby.ns.cloudflare.com, toby.ns.cloudflare.com, toby.ns.cloudflare.com...)
Analysis
IP Addresses
coursecheck.com points to IP number: 20.90.134.29.
Other host names such as stchris.co.uk, redspottedhanky.com, www.jncc.gov.uk, charityxmastreecollection.com and waws-prod-ln1-135-09e3.uksouth.cloudapp.azure.com share IPs with coursecheck.com.
Name Servers
coursecheck.com is delegated to two name servers: clarissa.ns.cloudflare.com and toby.ns.cloudflare.com.
coursecheck.com shares the same name server setup as cc-inc.org, sdcinter.com, householdprof.com, kirklandteeth.com and wflongmd.com.
coursecheck.com at least partially shares name servers with other domains, for instance acciaccappture.business, twylo.net, 71uwgamd.com.de, unitra99holdings.click and lolajack100.com.
These name servers are commonly used with ollie.ns.cloudflare.com and jay.ns.cloudflare.com.
Host names with six IP numbers:
clarissa.ns.cloudflare.com points to 2606:4700:50::a29f:267b, 2803:f800:50::6ca2:c27b, 2a06:98c1:50::ac40:227b, 108.162.194.123, 162.159.38.123 and 172.64.34.123.
toby.ns.cloudflare.com points to 2606:4700:58::adf5:3bef, 2803:f800:50::6ca2:c1ef, 2a06:98c1:50::ac40:21ef, 108.162.193.239, 172.64.33.239 and 173.245.59.239.
Mail Servers
Five mail servers handle coursecheck.com: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.
coursecheck.com shares at least partially some mail servers with other domains, including ns500759.ns500758.ns500759.ns500759.ns500759.ns500735.ns500698.ns500735.ns500576.ns500708.ns500576.trackreceptor.com, leisureislegetaways.com, indusholidays.in, ns500698.ns500759.ns500759.ns500735.ns500735.ns500698.ns500736.ns500698.ns500698.ns500735.ns500708.ns500698.ns500708.ns500708.ns500652.trackreceptor.com and ns500758.ns500759.ns500758.ns500758.ns500758.ns500735.ns500735.ns500736.ns500698.ns500736.ns500736.ns500708.ns500708.ns500698.ns500708.ns500708.ns500652.trackreceptor.com.
these mail servers are often used together with mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx4.googlemail.com and aspmx5.googlemail.com.
Host names with two IP numbers
aspmx2.googlemail.com points to: 2800:3f0:4003:c0f::1b and 108.177.123.27
aspmx3.googlemail.com points to: 2607:f8b0:4023:3003::1a and 172.253.145.26
aspmx.l.google.com points to: 2607:f8b0:4004:c23::1b and 192.178.155.27
alt1.aspmx.l.google.com points to: 2800:3f0:4003:c0f::1b and 108.177.123.26
alt2.aspmx.l.google.com points to: 2607:f8b0:4023:3003::1a and 172.253.145.27
Host names that point to 2800:3f0:4003:c0f::1b: aspmx2.googlemail.com and alt1.aspmx.l.google.com
Host names that point to 2607:f8b0:4023:3003::1a: aspmx3.googlemail.com and alt2.aspmx.l.google.com