SSL Certificate for gov.uk
Summary
gov.uk uses a certificate issued by GlobalSign RSA OV SSL CA 2018, valid until 2026-12-28 (74 days remaining).
Analysis
- gov.uk is valid until 2026-12-28 (74 days remaining).
- The certificate for gov.uk is issued by GlobalSign RSA OV SSL CA 2018.
- The certificate covers 13 hostnames, validating gov.uk and its associated names.
- The server negotiates TLSv1.3 with the cipher TLS_AES_128_GCM_SHA256.
- Port 443 is open and responded to a TLS handshake.
Certificate details
- Domain
- gov.uk
- Issuer
- GlobalSign RSA OV SSL CA 2018
- Subject
- www.gov.uk
- Valid From
- 2025-11-26
- Valid To
- 2026-12-28
- Serial
- 4247D6D08E7F58C125B85716
- Fingerprint (SHA-256)
- 7B:86:B9:31:7E:AE:2A:F2:53:D3:E3:4C:DA:95:17:B9:97:A5:A9:AD:BC:53:F1:65:CF:F5:54:76:E3:F6:1B:56
- SANs
DNS:www.gov.uk
DNS:*.businesslink.gov.uk
DNS:*.direct.gov.uk
DNS:*.publishing.service.gov.uk
DNS:*.cabinet-office.gov.uk
DNS:assets.digital.cabinet-office.gov.uk
DNS:service.gov.uk
DNS:data.gov.uk
DNS:dfid.gov.uk
DNS:cabinet-office.gov.uk
DNS:api.gov.uk
DNS:www.data.gov.uk
DNS:gov.uk
- TLS Version
- TLSv1.3
- Cipher
- TLS_AES_128_GCM_SHA256
- Port 443
- Port 443 is open and responded to a TLS handshake.
Frequently asked questions
When does the certificate for gov.uk expire?
The certificate for gov.uk expires on 2026-12-28 (74 days remaining).
Who issued the certificate for gov.uk?
The certificate for gov.uk was issued by GlobalSign RSA OV SSL CA 2018.
Is the SSL certificate for gov.uk still valid?
Yes — the certificate for gov.uk is valid until 2026-12-28 and has 74 days remaining.
What is an SSL certificate?
An SSL certificate is a digital certificate that authenticates a website's identity and enables an encrypted connection. A certificate authority (CA) verifies the identity and binds a public key to the domain name.
Why is an SSL certificate important?
SSL certificates encrypt data between the browser and the server, protecting logins, payments and personal data from interception. HTTPS requires a valid certificate, and search engines favor encrypted sites.
What is a TLS handshake?
The TLS handshake is the first step of a secure connection: the client and server agree on a protocol version, choose a cipher suite, and exchange keys — after which encrypted data flows.
How do I check a certificate?
Enter any domain name in the SSL checker tool to see who issued its certificate, its validity period, the TLS version and cipher, and whether port 443 responds.