What is 2a00:1450:4001:830::200e?
2a00:1450:4001::/48 is an IPv6 prefix used by Google LLC for its services in Europe (specifically Germany). Google's 2a00:1450::/32 block is used across its European data centers. IPv6 addresses in this range are associated with Google Search, Gmail, YouTube, and other Google properties served from Frankfurt.
Privacy note
If this IPv6 address appears in an IPv6 leak test, it may indicate that your browser is routing IPv6 traffic directly to Google services outside the VPN tunnel — which is a normal result if Google is your DNS or if you're visiting Google properties.