What Is a Dedicated IP Address?
A dedicated IP address is a public IP address assigned exclusively to a single customer, account, or server - In contrast to a shared IP, which is used by multiple accounts simultaneously. Dedicated IPs are relevant in three main contexts: web hosting, email sending, and VPN services, and the reasons for using one differ significantly across each.
Dedicated IP vs Shared IP
| Property | Dedicated IP | Shared IP |
|---|---|---|
| Used by | One account / server only | Hundreds to thousands of customers simultaneously |
| Email reputation | Your sending behaviour alone determines the IP's reputation | One bad sender on the same IP can damage deliverability for all |
| Blacklist risk | Lower - You control all activity on the IP | Higher - You can be listed due to another tenant's behaviour |
| SSL certificates | Historically required for HTTPS (no longer true with SNI) | SNI allows HTTPS on shared IPs - Less relevant now |
| Cost | Higher - Allocated exclusively | Lower - Resource shared across many customers |
| VPN use case | Same IP each session - Useful for IP whitelisting | Random IP from pool each session - Better for anonymity |
Dedicated IPs in Email Sending
For high-volume email senders, a dedicated sending IP is strongly recommended. Shared IP pools used by email service providers (ESPs) can have reputation issues if other senders on the pool trigger spam filters. With a dedicated IP, your reputation is built exclusively by your sending behaviour - Bounce rates, spam complaint rates, and engagement metrics. However, a new dedicated IP must be "warmed up" gradually (increasing volume over weeks) to establish a positive reputation history with inbox providers.
When You Need a Dedicated IP
- You send more than 50,000 emails per month and need consistent, predictable inbox delivery rates. Run a blacklist check on your IP to verify its reputation before large campaigns.
- You run a business VPN where remote employees need a stable IP whitelisted by corporate firewalls or security systems.
- You host a service that requires IP-based access controls (databases, APIs, or admin panels locked to specific IPs).
- You process payment card data and your PCI-DSS compliance requires a dedicated IP environment.
- You need to access services that block shared hosting IPs (some streaming platforms, DRM-protected content, banking sites).