What we can show about IONOS's hosting, each piece with its source and the date we checked it. IONOS is part of United Internet.
Evidence checked 16 October 2026. Green Web Foundation directory checked 17 October 2026.
Listed in the Green Web Foundation's directory of verified green providers, checked 17 October 2026.
GWF lists it as “IONOS SE” (provider 564).
GWF does not publish when a provider was last verified. Providers verified before October 2026 are reassessed under its new criteria, which no longer accept offsets, at their next reverification.
IONOS's own data centres and rented space in other companies' data centres; its pages do not say which hosting runs where.
| Country | Grid average | Year |
|---|---|---|
| Germany | 334 gCO2e/kWh | 2025 |
| France | 41 gCO2e/kWh | 2025 |
| United Kingdom | 218 gCO2e/kWh | 2025 |
| Spain | 153 gCO2e/kWh | 2025 |
| United States | 384 gCO2e/kWh | 2025 |
https://cloud.ionos.co.uk/data-centres UndatedOur facilities are located in the United Kingdom, other European countries and in the United States.
Grid figures: Ember, Yearly electricity data (2026), CC BY 4.0.
IONOS has sourced 100% renewable electricity for our own data centers for many years.
averages of the national grid mix where relevant
When the checker launches, this section will show its measurement of IONOS's own website: a fact about that one website, not about how its customers' sites are hosted.
Listing data from the Green Web Foundation's Green Web Dataset, made available under the Open Database License (ODbL).