certus.com - dns.ninja
certus.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=1784857317 | ||||||
📈 Tranco rank: #49,264
Subdomains
login.certus.com |
knowledgebase.certus.com |
adoptclaude.certus.com |
content.certus.com |
api.certus.com |
resources.certus.com |
cdn.certus.com |
redirect.certus.com |
fusion.certus.com |
retired.certus.com |
Same first word
Similar names
DNS History
13 records (7 active, 6 former)
○NSbuy.internettraffic.com2015-07-17 → 2016-07-12 · 4 obs
● 2016-07-12 20:24:42
○ 2016-11-27 05:21:42
○ 2026-07-24 01:57:36
●NSns1-01.azure-dns.com2026-02-15 → 2026-07-24 · 3 obs
● 2026-02-15 03:27:00
● 2026-07-24 01:57:36
○NSns1.uniregistrymarket.link2016-11-27 → 2016-12-16 · 5 obs
● 2016-11-27 05:21:42
● 2016-12-16 12:13:40
○ 2026-02-15 03:27:00
○ 2026-07-24 01:57:36
●NSns2-01.azure-dns.net2026-02-15 → 2026-07-24 · 3 obs
● 2026-02-15 03:27:00
● 2026-07-24 01:57:36
○NSns2.uniregistrymarket.link2016-11-27 → 2016-12-16 · 5 obs
● 2016-11-27 05:21:42
● 2016-12-16 12:13:40
○ 2026-02-15 03:27:00
○ 2026-07-24 01:57:36
●NSns3-01.azure-dns.org2026-02-15 → 2026-07-24 · 3 obs
● 2026-02-15 03:27:00
● 2026-07-24 01:57:36
●NSns4-01.azure-dns.info2026-02-15 → 2026-07-24 · 3 obs
● 2026-02-15 03:27:00
● 2026-07-24 01:57:36
○NSsell.internettraffic.com2015-07-17 → 2016-07-12 · 4 obs
● 2016-07-12 20:24:42
○ 2016-11-27 05:21:42
○ 2026-07-24 01:57:36
●MXcertus-com.mail.protection.outlook.com2026-02-15 → 2026-07-24 · 2 obs
● 2026-07-24 01:57:36
●A2a12:5240:1:c5::12026-02-15 → 2026-07-24 · 3 obs
● 2026-02-15 03:27:00
● 2026-07-24 01:57:36
○A69.172.201.1532016-07-12 → 2016-12-16 · 5 obs
● 2016-07-12 20:24:42
● 2016-12-16 12:13:40
○ 2026-02-15 03:27:00
○ 2026-07-24 01:57:36
○A69.172.201.2082015-07-17 → 2016-03-06 · 4 obs
● 2016-03-06 21:23:26
○ 2016-07-12 20:24:42
○ 2026-07-24 01:57:36
●A89.106.200.1972026-02-15 → 2026-07-24 · 3 obs
● 2026-02-15 03:27:00
● 2026-07-24 01:57:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net... | - |
| certus.com | ns1-01.azure-dns.com, ns2-01.azure-dns.net, ns3-01.azure-dns.org, ns4-01.azure-dns.info | 2 records |
✅ Authoritative Response
Server:13.107.236.1
NS records: ns1-01.azure-dns.com, ns2-01.azure-dns.net, ns3-01.azure-dns.org, ns4-01.azure-dns.info
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for certus.com (unsigned zone)
⏱️ Timing
Total: 586ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 89.106.200.197 |
| AAAA | 1 | 2a12:5240:1:c5::1 |
| NS | 4 | ns1-01.azure-dns.com, ns2-01.azure-dns.net... |
| MX | 1 | certus-com.mail.protection.outlook.com ( |
| TXT | 15 | v=spf1 ip4:147.124.160.0/19 ip4:198.105., atlassian-domain-verification=rUS5u5Y6P2... |
| SOA | 1 | ns1-01.azure-dns.com azuredns-hostmaster |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1-01.azure-dns.com, ns1-01.azure-dns.com)
Analysis
Hierarchy
Among the subdomains of certus.com are login.certus.com, knowledgebase.certus.com, adoptclaude.certus.com, content.certus.com, api.certus.com and a few other host names.
IP Addresses
certus.com points to the IP addresses 89.106.200.197 and 2a12:5240:1:c5::1
Two other host names, along with architectstraininginstitute.com, engineeringcredits.com and oshacampusonline.com, also share IP numbers with certus.com.
Name Servers
The NS records for certus.com point to four name servers: ns1-01.azure-dns.com, ns4-01.azure-dns.info, ns2-01.azure-dns.net and ns3-01.azure-dns.org.
There is at least partial name server overlap between certus.com and other domains — swecocmu.com, letsmt.org, farmacialabuena.com and two more among them.
All four hostnames — ns1-01.azure-dns.com, ns4-01.azure-dns.info, ns2-01.azure-dns.net and ns3-01.azure-dns.org — resolve to two IP numbers apiece: ns1-01.azure-dns.com to 13.107.236.1 and 2603:1061:0:700::1; ns4-01.azure-dns.info to 208.84.5.1 and 2620:1ec:bda:700::1; ns2-01.azure-dns.net to 150.171.21.1 and 2620:1ec:8ec:700::1; ns3-01.azure-dns.org to 204.14.183.1 and 2a01:111:4000:700::1.
Mail Servers
The sole mail server for certus.com is certus-com.mail.protection.outlook.com.
With 8 IP addresses total, certus-com.mail.protection.outlook.com resolves to 52.101.9.0, 52.101.41.58, 52.101.42.16 and 5 others.