SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
it-school.net
SSL/TLS Certificate
SSL/TLS Certificate for it-school.net
Untrusted chain- Issued by (CA)
- Sectigo Limited
- Subject
- www.myid.com.hk
- Valid from
- Dec 3, 2025
- Valid until
- Jan 3, 2027 (122 days remaining)
- Public key
- RSA 2048-bit
- Serial
- B640371DC63B57065D00F571E8A0D1DB
- SHA-256 fingerprint
- 3C:6E:21:43:92:5C:7F:C3:9E:46:EF:21:2E:A4:D8:D6:D0:D8:4E:74:D4:0E:B5:19:C3:BD:EC:5B:A8:33:AE:6E
- Chain
- —
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Sep 1, 2026.
Never get surprised by it-school.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch it-school.net continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
Free for your first domain: uptime, DNS, and certificate together. No credit card.