Contabo at a Glance
| Type | VPS and cloud server provider |
|---|---|
| Website | contabo.com |
| Network (ASN) | AS51167 CONTABO, AS40021 CONTABO-40021 |
| Announced IP space | 660 IPv4 prefixes (~688,640 addresses), 10 IPv6 prefixes |
| Customer nameservers | ns1.contabo.net, ns2.contabo.net, ns3.contabo.net |
Contabo Nameservers
To host a domain with Contabo, set these as the domain's nameservers at your registrar:
| Nameserver | IPv4 | Answered from network |
|---|---|---|
| ns1.contabo.net | 5.180.150.13 | AS51167 Contabo GmbH |
| ns2.contabo.net | 195.179.224.10 | AS51167 Contabo GmbH |
| ns3.contabo.net | 209.126.15.15 | AS40021 Contabo Inc. |
- Log in to the registrar where you bought the domain and open its DNS or nameserver settings.
- Choose custom nameservers and replace the current ones with the Contabo nameservers above.
- Save, then wait: nameserver changes take up to 24–48 hours to spread. Follow it live with the DNS propagation checker or the NS lookup.
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Contabo IP Ranges and ASN
Contabo announces its address space from 2 autonomous systems. Any website whose IP address falls in these ranges runs on Contabo's network. Counts are from the global routing table on September 25, 2026.
| ASN | Registered name | Registry | IPv4 prefixes | IPv4 addresses | IPv6 prefixes |
|---|---|---|---|---|---|
| AS51167 | CONTABO - Contabo GmbH, DE | ripencc · since 2010 | 568 | 543,232 | 5 |
| AS40021 | CONTABO-40021 - Contabo Inc., US | arin · since 2023 | 92 | 145,408 | 5 |
Largest Contabo IP blocks
169.58.0.0/17169.58.128.0/1713.140.128.0/18194.163.128.0/1838.242.192.0/1938.242.224.0/1975.119.128.0/1984.247.160.0/192a02:c202::/322a02:c204::/3213.140.32.0/20144.126.128.0/20147.93.128.0/20147.93.176.0/20157.173.192.0/20207.244.224.0/20207.244.240.0/20209.126.0.0/202605:a140::/322605:a141::/32Look up any address in these blocks with the IP lookup or the ASN lookup.
How to Check if a Website Is Hosted on Contabo
Enter the domain in the checker at the top of this page. It names Contabo when one or more of these signals match, and lists each one as evidence:
- The site's IP address is inside AS51167 or AS40021, the network Contabo announces.
- The domain uses Contabo nameservers (contabo.net). This shows where DNS is managed, which is usually but not always the host.
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Contabo FAQ
What are Contabo's nameservers?
Contabo customers point their domain to ns1.contabo.net, ns2.contabo.net, ns3.contabo.net. Changes take up to 24–48 hours to spread through DNS.
What is Contabo's ASN?
Contabo announces its IP addresses from AS51167 (CONTABO, registered with RIPENCC) and AS40021 (CONTABO-40021, registered with ARIN).
How many IP addresses does Contabo have?
As of September 25, 2026, Contabo's network announces 660 IPv4 prefixes covering about 688,640 IPv4 addresses, plus 10 IPv6 prefixes (source: RIPEstat routing data).
How can I tell if a website is hosted on Contabo?
Run the domain through the hosting checker on this page. It reports Contabo when the site's IP address is inside AS51167 or AS40021, the network Contabo announces, and it shows every matching signal as evidence.
Is Contabo a web host or a CDN?
Contabo is a vps and cloud server provider: it provides low-cost VPS, VDS and dedicated servers and object storage.
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Contabo is a trademark of its owner. DNS Robot is not affiliated with Contabo unless an offer above is marked sponsored.