Threat intelligence
Subdomain inventory drift
Discovered subdomains weekly compared to the approved allow-list.
Healthy
9 subdomains, all approved
Checked 7/26/2026, 5:05:26 AM · Source: Continuous integration
Enumerated 9 subdomain(s) across theartofcto.com, artofcto.com via crt.sh certificate-transparency logs; 9 on the approved allow-list. Wildcard entries are filtered before diffing. New subdomains must be added to .subdomain-allowlist.json once verified, or investigated for takeover risk.
What this check means
An attacker who hijacks a forgotten subdomain can phish customers under a domain that looks legitimate. Weekly discovery scans identify every subdomain that resolves; any new subdomain not on our approved allow-list is investigated.
Recent runs
| When | Result | Source | |
|---|---|---|---|
| 7/26/2026, 5:05:26 AM | 9 subdomains, all approved | Continuous integration | |
| 7/23/2026, 6:16:29 AM | crt.sh unavailable | Continuous integration | |
| 7/21/2026, 12:06:48 PM | 3 unapproved subdomains detected | Continuous integration | |
| 7/19/2026, 5:01:07 AM | crt.sh unavailable | Continuous integration | |
| 7/12/2026, 5:03:13 AM | 1 subdomains, all approved | Continuous integration | |
| 7/5/2026, 5:16:36 AM | 3 unapproved subdomains detected | Continuous integration | |
| 6/28/2026, 5:26:41 AM | 3 unapproved subdomains detected | Continuous integration | |
| 6/23/2026, 4:01:18 AM | crt.sh unavailable | Continuous integration | |
| 6/21/2026, 5:32:32 AM | 1 subdomains, all approved | Continuous integration | |
| 6/14/2026, 5:32:23 AM | crt.sh unavailable | Continuous integration | |
| 6/7/2026, 5:28:32 AM | crt.sh unavailable | Continuous integration | |
| 6/4/2026, 2:38:39 PM | 3 unapproved subdomains detected | Continuous integration | |
| 5/31/2026, 5:28:13 AM | crt.sh unavailable | Continuous integration | |
| 5/24/2026, 5:16:34 AM | crt.sh unavailable | Continuous integration | |
| 5/17/2026, 5:14:10 AM | 6 subdomains, all approved | Continuous integration | |
| 5/10/2026, 5:09:37 AM | 6 subdomains, all approved | Continuous integration | |
| 5/3/2026, 10:05:04 PM | crt.sh unavailable | Continuous integration | |
| 5/3/2026, 9:46:47 PM | crt.sh unavailable | Continuous integration | |
| 5/3/2026, 9:40:37 PM | crt.sh unavailable | Continuous integration | |
| 5/3/2026, 5:05:35 AM | 5 subdomains, all approved | Continuous integration | |
| 5/2/2026, 2:14:22 PM | 6 subdomains, all approved | Continuous integration |
Need additional detail (sanitised report, supporting evidence)? security@theartofcto.com