opencolleague.com - robtex.com
opencolleague.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=1774978767 | ||||||
Subdomains
mail.opencolleague.com |
Same first word
opencolleague.com |
DNS History
8 records (8 active, 0 former)
●NSns1.linode.com2016-12-13 → 2026-03-31 · 2 obs
● 2026-03-31 17:55:58
●NSns2.linode.com2016-12-13 → 2026-03-31 · 2 obs
● 2026-03-31 17:55:58
●NSns3.linode.com2016-12-13 → 2026-03-31 · 2 obs
● 2026-03-31 17:55:58
●NSns4.linode.com2016-12-13 → 2026-03-31 · 2 obs
● 2026-03-31 17:55:58
●NSns5.linode.com2016-12-13 → 2026-03-31 · 2 obs
● 2026-03-31 17:55:58
●MXmail.opencolleague.com2016-12-13 → 2026-03-31 · 2 obs
● 2026-03-31 17:55:58
●A139.162.180.962016-12-13 → 2026-03-31 · 2 obs
● 2026-03-31 17:55:58
●A2a01:7e01::f03c:91ff:fee2:98972016-12-13 → 2026-03-31 · 2 obs
● 2026-03-31 17:55:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | e.gtld-servers.net, l.gtld-servers.net, g.gtld-servers.net, j.gtld-servers.net... | - |
| opencolleague.com | ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com... | 10 records |
✅ Authoritative Response
Server:92.123.95.2
NS records: ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com, ns5.linode.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for opencolleague.com (unsigned zone)
⏱️ Timing
Total: 345ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 139.162.180.96 |
| AAAA | 1 | 2a01:7e01::f03c:91ff:fee2:9897 |
| NS | 5 | ns4.linode.com, ns2.linode.com... |
| MX | 1 | mail.opencolleague.com (pri: 10) |
| SOA | 1 | ns1.linode.com vincent\.t\.metzger.gmail |
📌 Glue Records Collected
Total: 10
Out-of-bailiwick: 10 (ns1.linode.com, ns1.linode.com, ns2.linode.com...)
Analysis
Hierarchy
opencolleague.com is the parent of mail.opencolleague.com.
IP Addresses
opencolleague.com resolves to two IP numbers: 2a01:7e01::f03c:91ff:fee2:9897 and 139.162.180.96.
Other host names, for instance, mail.opencolleague.com and li1497-96.members.linode.com share IP numbers with opencolleague.com.
Name Servers
opencolleague.com delegates to five name servers: ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com and ns5.linode.com.
opencolleague.com shares some name servers with other domains, for example weildworks.com, showstorm.org, wan-lee.com, epice.jp and chrisnekarda.com.
Host names with two IPs:
Host ns1.linode.com has IPs 2600:14c0:6::2 and 92.123.94.2.
Host ns2.linode.com has IPs 2600:14c0:6::3 and 92.123.94.3.
Host ns3.linode.com has IPs 2600:14c0:7::3 and 92.123.95.3.
Host ns4.linode.com has IPs 2600:14c0:7::4 and 92.123.95.4.
Host ns5.linode.com has IPs 2600:14c0:7::2 and 92.123.95.2.
Mail Servers
opencolleague.com is handled by a single mail server, mail.opencolleague.com.
mail.opencolleague.com resolves to two IPs: 2a01:7e01::f03c:91ff:fee2:9897 and 139.162.180.96.