Perhaps not completely global, but there have been some extremely widespread outages (usually from DNS or BGP misconfiguration).

- 2019: Verizon/BGP routing issue

- 2021: Verizon/FIOS routing issue

- 2021: Fastly CDN outage

- 2021: Comcast: San Francisco backbone outage

- 2021: Akamai: Edge DNS outage

- 2022: Rogers telecom routing issue

- 2023: Cloudflare: DNSSec expired certificates triggered an outage

- 2025: Cloudflare: core proxy outage