coursehost.com - dns.ninja
coursehost.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=1783414946 | ||||||
Subdomains
custom.coursehost.com |
kgbtraining.coursehost.com |
s84.coursehost.com |
yesbank.coursehost.com |
gvf.coursehost.com |
itto.coursehost.com |
s85.coursehost.com |
hometownhealthonline.coursehost.com |
mexicoport.coursehost.com |
www.coursehost.com |
Same first word
coursehost.com |
coursehost.co |
coursehost.net |
Similar names
DNS History
17 records (11 active, 6 former)
●NSns-1168.awsdns-18.org2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
●NSns-1566.awsdns-03.co.uk2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
●NSns-432.awsdns-54.com2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
●NSns-890.awsdns-47.net2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
●MXalt1.aspmx.l.google.com2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
●MXalt2.aspmx.l.google.com2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
●MXaspmx.l.google.com2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
●MXaspmx2.googlemail.com2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
●MXaspmx3.googlemail.com2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
●MXaspmx4.googlemail.com2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
●MXaspmx5.googlemail.com2015-06-20 → 2026-07-07 · 2 obs
● 2026-07-07 09:19:58
○A54.214.33.62016-01-10 → 2016-01-22 · 5 obs
● 2016-01-10 17:45:26
● 2016-01-22 21:37:48
○ 2016-08-12 02:06:14
○ 2026-07-07 09:19:58
○A54.214.34.882016-08-12 → 2016-08-12 · 4 obs
● 2016-08-12 02:06:14
○ 2026-02-20 09:14:38
○ 2026-07-07 09:19:58
○A54.214.47.692015-11-20 → 2015-11-20 · 4 obs
● 2015-11-20 01:57:50
○ 2016-01-10 17:45:26
○ 2026-07-07 09:19:58
○A54.214.9.1252015-10-12 → 2015-10-12 · 4 obs
● 2015-10-12 10:43:46
○ 2015-11-20 01:57:50
○ 2026-07-07 09:19:58
○A54.244.116.362015-06-20 → 2015-06-20 · 3 obs
○ 2026-02-20 09:14:38
○ 2026-07-07 09:19:58
○A54.244.224.2462015-06-20 → 2015-06-20 · 3 obs
○ 2015-10-12 10:43:46
○ 2026-07-07 09:19:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | j.gtld-servers.net, c.gtld-servers.net, b.gtld-servers.net, k.gtld-servers.net... | - |
| coursehost.com | ns-432.awsdns-54.com, ns-890.awsdns-47.net, ns-1566.awsdns-03.co.uk, ns-1168.awsdns-18.org | 2 records |
✅ Authoritative Response
Server:205.251.193.176
NS records: ns-432.awsdns-54.com, ns-890.awsdns-47.net, ns-1566.awsdns-03.co.uk, ns-1168.awsdns-18.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coursehost.com (unsigned zone)
⏱️ Timing
Total: 2076ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | ns-1168.awsdns-18.org, ns-1566.awsdns-03.co.uk... |
| MX | 7 | aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)... |
| SOA | 1 | ns-1168.awsdns-18.org awsdns-hostmaster. |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns-432.awsdns-54.com, ns-432.awsdns-54.com)
Analysis
Hierarchy
coursehost.com serves as parent to custom.coursehost.com, kgbtraining.coursehost.com, s84.coursehost.com, yesbank.coursehost.com, gvf.coursehost.com along with a few other host names.
Name Servers
Four name servers handle the delegation for coursehost.com: ns-432.awsdns-54.com, ns-890.awsdns-47.net, ns-1168.awsdns-18.org and ns-1566.awsdns-03.co.uk.
ns-432.awsdns-54.com, ns-890.awsdns-47.net, ns-1168.awsdns-18.org and ns-1566.awsdns-03.co.uk all point to exactly two IP numbers each: ns-432.awsdns-54.com → 205.251.193.176 and 2600:9000:5301:b000::1; ns-890.awsdns-47.net → 205.251.195.122 and 2600:9000:5303:7a00::1; ns-1168.awsdns-18.org → 205.251.196.144 and 2600:9000:5304:9000::1; ns-1566.awsdns-03.co.uk → 205.251.198.30 and 2600:9000:5306:1e00::1.
Mail Servers
Mail for coursehost.com is routed through 7 mail servers, including aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and 4 other.
At least some of the mail servers used by coursehost.com are shared with other domains: ns500699.ns500699.ns500734.ns500693.ns500699.ns500699.ns500588.ns500699.ns500683.ns500632.ns500612.ns500612.ns500612.ns500588.ns500588.dtrkdll.com, efeaydal.com, ns500758.ns500698.ns500758.ns500698.ns500758.ns500735.ns500735.ns500698.ns500735.ns500708.ns500576.ns500698.ns500576.ns500652.ns500652.ns500619.trackreceptor.com and two others among them.
These mail servers are often deployed together with alt2.aspmx.l.google.com, aspmx.l.google.com, alt1.aspmx.l.google.com and 3 other mail servers.
Host names pointing to two IP addresses:
aspmx2.googlemail.com resolves to two addresses: 108.177.123.26 and 2800:3f0:4003:c0f::1b.
aspmx3.googlemail.com resolves to two addresses: 172.253.116.26 and 2a00:1450:400b:c02::1a.
aspmx4.googlemail.com resolves to two addresses: 142.251.127.26 and 2a00:1450:4001:c21::1b.
aspmx5.googlemail.com resolves to two addresses: 172.253.157.26 and 2a00:1450:400c:c23::1a.
aspmx.l.google.com resolves to two addresses: 142.251.16.27 and 2607:f8b0:4004:c23::1b.
alt1.aspmx.l.google.com resolves to two addresses: 108.177.123.26 and 2800:3f0:4003:c0f::1b.
alt2.aspmx.l.google.com resolves to two addresses: 172.253.116.27 and 2a00:1450:400b:c02::1b.
aspmx2.googlemail.com along with alt1.aspmx.l.google.com each resolve to 2800:3f0:4003:c0f::1b IP addresses.
aspmx2.googlemail.com along with alt1.aspmx.l.google.com each resolve to 108.177.123.26 IP addresses.