SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for cityu-edu-hk.com

Valid
Issued by (CA)
Let's Encrypt
Subject
creatorelevationco.com
Valid from
Oct 16, 2026
Valid until
Jan 14, 2027 (74 days remaining)
Public key
EC 256-bit
Serial
05391641F90168DCAD87D86CF102D4325CBB
SHA-256 fingerprint
23:4C:D8:6E:E8:BD:3C:62:85:C4:98:56:DF:A1:17:39:54:CF:48:57:CE:EC:A4:5F:12:8D:EF:1D:E9:4A:42:F3
Chain
YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (90)
*.bosniaok.info, *.brickellkitchen.info, *.brigh-tnetstudio.click, *.bscnursinghub.com, *.bxtx1688.com, *.c8b8k8.cc, *.caifusoft01.com, *.cash-strike.net, *.cdmtchina.com, *.chalet-rentalchde.com, *.china5gok.com, *.chinaaiu.com, *.chinabenye.com, *.chinabydd.com, *.chinaceda.org, *.chinadianmao.com, *.chinaedunew.com, *.chinai1.com, *.chinamedica.org, *.chinamedvale.com, *.chinaminze.com, *.chinaobrien.org, *.chinasio2.com, *.chinaslzy.com, *.chinathb.com, *.chinatzjc.com, *.chinaviharas.com, *.chinawanted.com, *.chinaxgjs.com, *.chzhschool.com, *.cityu-edu-hk.com, *.cloudbnsoft.com, *.connectedsmarttechenergy.com, *.corex2analytics.digital, *.creatorelevationco.com, *.crystalcleartravels.biz, *.csgsedu.com, *.ctjpn.vip, *.cupsbet.com, *.curlsinchina.com, *.dataapex.click, *.deformidad.com, *.denktra.com, *.tacoedup.com, *.tafihocyj.pro, bosniaok.info, brickellkitchen.info, brigh-tnetstudio.click, bscnursinghub.com, bxtx1688.com, c8b8k8.cc, caifusoft01.com, cash-strike.net, cdmtchina.com, chalet-rentalchde.com, china5gok.com, chinaaiu.com, chinabenye.com, chinabydd.com, chinaceda.org, chinadianmao.com, chinaedunew.com, chinai1.com, chinamedica.org, chinamedvale.com, chinaminze.com, chinaobrien.org, chinasio2.com, chinaslzy.com, chinathb.com, chinatzjc.com, chinaviharas.com, chinawanted.com, chinaxgjs.com, chzhschool.com, cityu-edu-hk.com, cloudbnsoft.com, connectedsmarttechenergy.com, corex2analytics.digital, creatorelevationco.com, crystalcleartravels.biz, csgsedu.com, ctjpn.vip, cupsbet.com, curlsinchina.com, dataapex.click, deformidad.com, denktra.com, tacoedup.com, tafihocyj.pro

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

We've observed 2 previous certificates for this host. This certificate has been served since Oct 25, 2026.

Never get surprised by cityu-edu-hk.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch cityu-edu-hk.com continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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, CNAME, TXT 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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.