Public IP address
The address websites see when you go online. At home and in offices it is usually assigned by your ISP and may change from time to time.
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What is my IP? and SSL check
See your public IP address instantly, or check a site's SSL certificate validity, expiry date and chain.
- Free
- IPv4 and IPv6
- SSL chain
- No sign-up
What to know about IP addresses and SSL
Both tools cover the checks people use most to understand the health of a connection or a site.
IPv4 / IPv6
IPv4 addresses are four number groups; IPv6 addresses are colon-separated hexadecimal groups. Many connections use both.
Reverse DNS
Shows the name an IP address maps to. Mail servers need a correct reverse DNS to pass spam filters.
SSL certificate
Encrypts the connection between the browser and the site and verifies who owns it. An expired certificate shows visitors a warning.
Certificate chain
A site's certificate links to a trusted root through intermediate certificates. A broken chain causes errors on some devices.
Renewal time
Certificates are short-lived. Plan renewal when under 30 days remain; hosting with auto-renewal removes the problem.
If you get an SSL error
- 011
Check the expiry date
The most common cause is an expired certificate. If the time left is zero, renew it.
- 022
Check the name match
The certificate must cover the visited name (including www). Uncovered names trigger a warning.
- 033
Verify the chain
If an intermediate certificate is missing, browsers treat the certificate as untrusted. Install the full chain on the server.
Frequently asked questions
Why does my IP address change?
Most ISPs give home connections a dynamic IP. It can change when the modem restarts or after a period. A static IP is usually a paid ISP service.
Does a VPN change my IP address?
Yes. This tool shows the address websites see; with a VPN on you see the VPN server's address and country.
What can others learn from my IP?
Your approximate location (city/country) and ISP can be inferred; your exact address or identity cannot be read directly from an IP.
Which port does the SSL check use?
It checks port 443, the standard HTTPS port. The domain must resolve to a public IP address.
Is SSL free with hosting plans?
Yes. Every hosting plan includes free SSL that renews automatically.
Hosting with free SSL
The SSL certificate is installed and renewed automatically; you just focus on your site.
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