cert.org - dns.ninja
cert.org
org
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation | ||||||
| NS | a2.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | b0.org.afilias-nst.org | ||||||
| NS | b2.org.afilias-nst.org | ||||||
| NS | c0.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | d0.org.afilias-nst.org | ||||||
| SOA | a0.org.afilias-nst.infohostmaster@donuts.email serial=1786771407 | ||||||
rank #509 in the tld
WOT: SAFE (92/100)
📈 Tranco rank: #17,545
Previously NS for
Subdomains
kb.cert.org |
www.cert.org |
securecoding.cert.org |
forms.cert.org |
routeviews-mirror.cert.org |
Same first word
Similar names
DNS History
15 records (7 active, 8 former)
●NSns-1403.awsdns-47.org2026-03-04 → 2026-08-15 · 3 obs
● 2026-03-04 06:21:32
● 2026-08-15 05:41:26
●NSns-1794.awsdns-32.co.uk2026-03-04 → 2026-08-15 · 3 obs
● 2026-03-04 06:21:32
● 2026-08-15 05:41:26
●NSns-28.awsdns-03.com2026-03-04 → 2026-08-15 · 3 obs
● 2026-03-04 06:21:32
● 2026-08-15 05:41:26
●NSns-916.awsdns-50.net2026-03-04 → 2026-08-15 · 3 obs
● 2026-03-04 06:21:32
● 2026-08-15 05:41:26
○NSns-grid-master.sei.cmu.edu2018-01-08 → 2020-05-12 · 5 obs
● 2018-01-08 23:40:48
● 2020-05-12 21:21:22
○ 2026-03-04 06:21:32
○ 2026-08-15 05:41:26
○NSns1.cert.org2015-08-18 → 2017-12-04 · 4 obs
● 2017-12-04 18:57:18
○ 2018-01-08 23:40:48
○ 2026-08-15 05:41:26
○NSns1.sei.cmu.edu2018-01-08 → 2020-05-12 · 5 obs
● 2018-01-08 23:40:48
● 2020-05-12 21:21:22
○ 2026-03-04 06:21:32
○ 2026-08-15 05:41:26
○NSns2.cert.org2015-08-18 → 2017-12-04 · 4 obs
● 2017-12-04 18:57:18
○ 2018-01-08 23:40:48
○ 2026-08-15 05:41:26
○NSns2.sei.cmu.edu2018-01-08 → 2020-05-12 · 5 obs
● 2018-01-08 23:40:48
● 2020-05-12 21:21:22
○ 2026-03-04 06:21:32
○ 2026-08-15 05:41:26
○MXbrick.red.cert.org2015-08-18 → 2020-05-12 · 4 obs
● 2020-05-12 21:21:22
○ 2026-03-04 06:21:32
○ 2026-08-15 05:41:26
○MXnorthridge.red.cert.org2015-08-18 → 2020-05-12 · 4 obs
● 2020-05-12 21:21:22
○ 2026-03-04 06:21:32
○ 2026-08-15 05:41:26
●MXtilton.sei.cmu.edu2026-03-04 → 2026-08-15 · 3 obs
● 2026-03-04 06:21:32
● 2026-08-15 05:41:26
●MXtingley.sei.cmu.edu2026-03-04 → 2026-08-15 · 3 obs
● 2026-03-04 06:21:32
● 2026-08-15 05:41:26
○A128.237.30.132015-08-18 → 2020-05-12 · 4 obs
● 2020-05-12 21:21:22
○ 2026-03-04 06:21:32
○ 2026-08-15 05:41:26
●A147.72.252.2422026-03-04 → 2026-08-15 · 3 obs
● 2026-03-04 06:21:32
● 2026-08-15 05:41:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org | - |
| cert.org | ns-916.awsdns-50.net, ns-28.awsdns-03.com, ns-1794.awsdns-32.co.uk, ns-1403.awsdns-47.org | 2 records |
✅ Authoritative Response
Server:205.251.197.123
NS records: ns-916.awsdns-50.net, ns-28.awsdns-03.com, ns-1794.awsdns-32.co.uk, ns-1403.awsdns-47.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cert.org (unsigned zone)
⏱️ Timing
Total: 390ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 147.72.252.242 |
| NS | 4 | ns-1403.awsdns-47.org, ns-1794.awsdns-32.co.uk... |
| MX | 2 | tilton.sei.cmu.edu (pri: 10), tingley.sei.cmu.edu (pri: 10) |
| TXT | 5 | DBCAA5143AC8DA050F83A2DCA34D2135, GjlKiHz4O+yqufLrRIiCkmyaNeKDsFtlP0EdfJ5H... |
| SOA | 1 | ns-1403.awsdns-47.org awsdns-hostmaster. |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns-1403.awsdns-47.org, ns-1403.awsdns-47.org)
Analysis
Hierarchy
The domain cert.org serves as parent to kb.cert.org, www.cert.org, securecoding.cert.org, forms.cert.org and routeviews-mirror.cert.org.
IP Addresses
cert.org resolves to one IP address: 147.72.252.242.
www.cert.org, for instance, is one of the other host names sharing IP numbers with cert.org.
Name Servers
The authoritative name servers for cert.org are ns-28.awsdns-03.com, ns-916.awsdns-50.net, ns-1403.awsdns-47.org and ns-1794.awsdns-32.co.uk.
At least some of cert.org's name servers are shared with other domains, for example uk.streamvia.com, d3sxey1psjc2z6.cloudfront.net, theautry.org and two more.
Four hostnames, each resolving to a pair of IP addresses: ns-28.awsdns-03.com directs to 205.251.192.28 and 2600:9000:5300:1c00::1; ns-916.awsdns-50.net directs to 205.251.195.148 and 2600:9000:5303:9400::1; ns-1403.awsdns-47.org directs to 205.251.197.123 and 2600:9000:5305:7b00::1; ns-1794.awsdns-32.co.uk directs to 205.251.199.2 and 2600:9000:5307:200::1.
Mail Servers
Mail for cert.org is handled by two mail servers — tilton.sei.cmu.edu and tingley.sei.cmu.edu.
The mail server configuration of cert.org is identical to that of other domains — sei.cmu.edu being one example.
Each of tilton.sei.cmu.edu and tingley.sei.cmu.edu has one IP address: tilton.sei.cmu.edu uses 147.72.252.13 and tingley.sei.cmu.edu uses 147.72.252.12.