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netcup IP Ranges

netcup provides cloud compute and hosting. Its network operates under AS197540 and announces 239 IPv4 prefixes, so addresses in this space belong to hosted servers rather than home connections.

Hosting
Provider
netcup
Primary ASN
AS197540
Category
Hosting
Headquarters
Karlsruhe, Germany
Announced IPv4 prefixes
239
Registry
-

By: Katia Belokon · Verified July 2026

IP Geolocation LookupWHOIS LookupVPN Leak Test

Known IP ranges

These prefixes are currently announced to the global routing table by AS197540 (netcup-AS netcup GmbH). Prefix sets change over time - use WHOIS Lookup for the authoritative record on any specific address.

37.120.160.0/19
152.53.128.0/20
188.68.32.0/20
202.61.224.0/20
37.120.160.0/20
5.45.96.0/20
46.38.224.0/20
37.221.192.0/21
188.68.48.0/21
46.38.240.0/21
2a0f:5b00::/32
2a03:4000::/32
2a0f:5b01::/32 (IPv6)

What does a netcup IP mean in a privacy test?

A netcup address as your exit means your traffic leaves through a hosted server - typically a VPN or proxy running on their infrastructure. Streaming and banking sites often treat data-center address space differently from residential IPs.

Related tools

IP Geolocation LookupLook up any netcup IP for location and ASN data.WHOIS LookupView the registered CIDR block for any address.VPN Leak TestCheck if your VPN is leaking your real IP, DNS or WebRTC data.AS197540 network detailsRegistry data for this autonomous system.DNS Leak TestSee which resolver answers your DNS queries.What Is an ASN?How autonomous systems identify networks.

Frequently asked questions

What IP ranges does netcup use?

netcup announces 239 IPv4 prefixes and 16 IPv6 prefixes under AS197540. Larger blocks include 37.120.160.0/19, 152.53.128.0/20, 188.68.32.0/20. The full current list is published by its regional registry, and prefixes change as the network grows.

Why does a netcup IP appear in my privacy test?

A netcup address as your exit means your traffic leaves through a hosted server - typically a VPN or proxy running on their infrastructure. Streaming and banking sites often treat data-center address space differently from residential IPs.

How large is the netcup network?

AS197540 announces 239 IPv4 prefixes and 16 IPv6 prefixes. Registry data for the network is held by its RIR.

How do I look up a netcup IP address?

Enter the address in the MyIPScan IP Geolocation Lookup. Addresses in this network return AS197540 (netcup-AS netcup GmbH). WHOIS Lookup shows the registered CIDR block for any specific address.

What ASN does netcup use?

netcup operates AS197540, registered with its RIR and held by netcup-AS netcup GmbH. In a privacy test this ASN is what identifies traffic as belonging to their network.