Germany · open in early access
Is my site blocked on Vodafone in Germany?
Vodafone blocks sites named by the CUII in its DNS (the internet's address book), and its customers do not all see the same thing, because its former Kabel Deutschland cable network answers differently from the rest. Vodafone has also sold security filters, Secure Net on mobile and Secure Net+ on home lines. A wrong copyright block has to be raised with the CUII; for Vodafone's filters we found no published route for site owners.
Sources: CUII, members · Vodafone, help: security · Vodafone, Secure Net (mobile) terms, July 2022 · CUII, contact; pages without a date checked 11 November 2026
Check your page in Germany now
We open it through home and mobile connections of Telekom, Vodafone and O2, the way their customers would, and tell you provider by provider whether it opens. Free, about a minute, a few checks per hour.
Why do Vodafone customers see different errors for the same blocked site?
Because Vodafone runs two networks that answer differently: its own, and the former Kabel Deutschland cable network. PeeringDB lists that network as AS31334, Vodafone Kabel Deutschland, and notes that its customers are now reached through Vodafone's main network AS3209. In our own measurements in November 2026, most Vodafone lines sent a blocked name to a notice server, while the former Kabel Deutschland network answered that the domain does not exist. So one Vodafone customer may report a security warning (what https pages usually show after a detour to a notice server) and another "server not found" for the same domain. Neither looks like a block. Vodafone's answer has changed before: in 2024 the operator of cuiiliste.de found its DNS servers answering that blocked domains do not exist, as netzpolitik.org reported; Vodafone did not answer the site's questions.
Sources: PeeringDB, AS31334 and AS3209, checked 11 November 2026 · netzpolitik.org, 26 February 2025
Was Vodafone blocking sites before the CUII existed?
Yes, on its cable network. In June 2018 the Higher Regional Court in Munich upheld an injunction that the film distributor Constantin Film had won against Vodafone: Vodafone had to keep blocking its customers' access to the film "Fack Ju Göhte 3" on the streaming site kinox.to. Vodafone's spokesman said the order covered internet customers of its cable division. Vodafone had already set up a DNS redirect, which sent customers who typed in kinox.to to a block page of its own. The CUII, which now coordinates such blocks for all its members, was set up in 2021.
Sources: teltarif.de, 15 June 2018 · t-online, 15 June 2018 · heise online, 16 July 2025
Can Vodafone's own security filters block my site?
Only for customers who have them. On home lines, Vodafone says Secure Net+ blocks harmful websites automatically on every device connected to the home connection. It can no longer be booked, but existing customers keep it, and each customer sets the protection level in a portal or app.
On mobile, Vodafone's terms for Secure Net, dated July 2022 and still on its site, describe a filter in the mobile network that analyses web pages and warns before an unsafe site opens; the customer can then decide to continue. By the same terms it does not protect https connections, Wi-Fi that Vodafone does not provide, or connections through a VPN, and it costs 0.99 euros a month unless the tariff includes it. A filter that skips https mostly matters for pages still served over plain http. Vodafone's current help pages describe only Secure Net+, and we could not confirm whether the mobile service is still sold.
Sources: Vodafone, help: security, checked 11 November 2026 · Vodafone, Secure Net (mobile) terms, July 2022
Who can lift a wrong Vodafone block?
For a CUII block, only the CUII: Vodafone applies it as a member, and its support cannot lift it. Use the form on cuii.info, choose "Domaininhaber" (domain owner) as the sender type, and mention it if the domain was blocked before you owned it; the CUII says you will hear within a week that it arrived. For Secure Net and Secure Net+, neither Vodafone's security help page nor the Secure Net terms describe a way for site owners to report a wrongly blocked site, and we found no other published route.
Sources: CUII, contact · Vodafone, help: security; both checked 11 November 2026
How can I check a Vodafone block myself?
Ask the visitor whether they are on cable, DSL or mobile, and what the browser shows. Then search the sites listed on cuii.info, and look in OONI Explorer for tests on AS3209, which per PeeringDB now also carries the former Kabel Deutschland customers. OONI Explorer shows only what app users have happened to test. For the other big providers, see Telekom and O2, and the Germany overview.
Sources: PeeringDB, AS31334 · OONI, Explorer guide, updated 15 March 2023; checked 11 November 2026
What does linkspect measure on Vodafone?
We open your URL through Vodafone home broadband and mobile connections, the way its customers would, and say for each whether the page opened and, if not, what stopped it. On mobile we cannot ask Vodafone's DNS server directly, so a DNS block there is reported as "likely" at most. Vodafone's optional security filter is "not measured", because we have not found test connections with it switched on.
Facts checked on 11 November 2026.