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ISPs Throttle Users Connecting via Carrier-Grade NAT, Says Cloudflare

First seen 24 Nov 2025, 01:23 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

Cloudflare's recent research indicates that users connecting through carrier-grade NAT (CG-NAT) are more likely to experience throttled or blocked internet connections. This situation arises from the historical allocation of IPv4 addresses, where some nations secured larger shares, leaving many users vulnerable to connectivity issues. The findings highlight the ongoing challenges posed by the depletion of IPv4 addresses and the reliance on NAT technologies.

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