courseling.com - robtex.com
courseling.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 127.0.0.1 | ||||||
| NS | ns1.openprovider.nl ⭐ | ||||||
| A | 2400:cb00:2049:1::a29f:1a0a🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street | ||||||
| A | 162.159.26.10Cloudflare162.159.26.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.openprovider.be | ||||||
| A | 2400:cb00:2049:1::a29f:1b60🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street | ||||||
| A | 162.159.27.96Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns3.openprovider.eu | ||||||
| A | 2400:cb00:2049:1::a29f:3059🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street | ||||||
| A | 162.159.48.89Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| MX | mail.courseling.com ⭐ | ||||||
| A | 127.0.0.1 | ||||||
| SOA | ns1.openprovider.nldns@openprovider.eu 2015-12-15 #1 | ||||||
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=1774606072 | ||||||
Subdomains
mail.courseling.com |
Same first word
courseling.com |
Similar names
DNS History
5 records (5 active, 0 former)
●NSns1.openprovider.nl2016-12-14 → 2026-03-27 · 2 obs
● 2026-03-27 10:30:50
●NSns2.openprovider.be2016-12-14 → 2026-03-27 · 2 obs
● 2026-03-27 10:30:50
●NSns3.openprovider.eu2016-12-14 → 2026-03-27 · 2 obs
● 2026-03-27 10:30:50
●MXmail.courseling.com2016-12-14 → 2026-03-27 · 2 obs
● 2026-03-27 10:30:50
●A127.0.0.12016-12-14 → 2026-03-27 · 2 obs
● 2026-03-27 10:30:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| courseling.com | ns1.openprovider.nl, ns3.openprovider.eu, ns2.openprovider.be | - |
✅ Authoritative Response
Server:162.159.48.89
NS records: ns1.openprovider.nl, ns3.openprovider.eu, ns2.openprovider.be
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for courseling.com (unsigned zone)
⏱️ Timing
Total: 639ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 127.0.0.1 |
| NS | 3 | ns2.openprovider.be, ns1.openprovider.nl... |
| MX | 1 | mail.courseling.com (pri: 10) |
| SOA | 1 | ns1.openprovider.nl dns.openprovider.eu |
Analysis
Hierarchy
courseling.com is the parent of mail.courseling.com.
IP Addresses
courseling.com resolves to one IP number: 127.0.0.1.
other host names including sibbo.com, foshan.k-se.com, 175.7.203.62.dynamic.wline.res.cust.swisscom.ch, mail.aoouoo.com and mail.xn--wohnmbel24-icb.de share IP numbers with courseling.com.
Name Servers
courseling.com is delegated to three name servers ns2.openprovider.be, ns3.openprovider.eu and ns1.openprovider.nl.
courseling.com at least partially shares name servers with other domains, for instance autoroutes-reglementpeage.com, personeelsadvies-info.nl, levenmagazine.nl, am-ts.nl and revokes.net.
Host names with two IP numbers:
ns2.openprovider.be points to: 2400:cb00:2049:1::a29f:1b60 and 162.159.27.96.
ns3.openprovider.eu points to: 2400:cb00:2049:1::a29f:3059 and 162.159.48.89.
ns1.openprovider.nl points to: 2400:cb00:2049:1::a29f:1a0a and 162.159.26.10.
Mail Servers
courseling.com is handled by a single mail server, mail.courseling.com.