Vercel IP geolocation updates deliver city-level data for nearly all requests and postal codes for 90% of traffic

Details

Vercel IP geolocation now resolves visitor locations with finer network granularity, providing city-level data for nearly all requests and postal-code data for 90% of traffic.
Data is refreshed more often to keep up with IP range reassignments and routing changes, requiring no code or configuration changes for existing projects.
Existing geolocation headers and the geolocation() helper in @vercel/functions return the same fields for Vercel Functions and Routing Middleware.
Traffic from VPNs, hosting providers, and leased IP ranges may now resolve to a different city or country than before.
Subnets announced from a hosting provider in a different country than their regional internet registry (RIR) record now resolve to the data center where the traffic actually terminates.
Developers using geolocation for access controls, localization, or compliance should verify access rules against an IP's active network location rather than its static registry allocation.

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