Hosting provider
1&1 Internet IP ranges
1&1 Internet: 13 datacenter IP ranges, 368,640 IPv4 addresses (0.17% of listed datacenter space). Largest blocks, ASNs, countries and what 1&1 Internet traffic means.
At a glance
- Name
- 1&1 Internet
- Type
- Datacenter / hosting
- Share of datacenter space
- 0.17%
- Website
- www.1and1.com
- Country
- United States, Germany
- Largest range
- 74.208.0.0/16
Networks announcing these ranges
Where the ranges are located
Sample cities: Kansas City, Frankfurt am Main, Berlin, Karlsruhe, Sulphur Springs
Largest IP ranges
| CIDR | First address | Last address | Addresses |
|---|---|---|---|
| 74.208.0.0/16 | 74.208.0.0 | 74.208.255.255 | 65,536 |
| 82.165.0.0/16 | 82.165.0.0 | 82.165.255.255 | 65,536 |
| 87.106.0.0/16 | 87.106.0.0 | 87.106.255.255 | 65,536 |
| 212.227.0.0/16 | 212.227.0.0 | 212.227.255.255 | 65,536 |
| 217.160.0.0/16 | 217.160.0.0 | 217.160.255.255 | 65,536 |
| 195.20.224.0/19 | 195.20.224.0 | 195.20.255.255 | 8,192 |
| 213.165.64.0/19 | 213.165.64.0 | 213.165.95.255 | 8,192 |
| 50.21.176.0/20 | 50.21.176.0 | 50.21.191.255 | 4,096 |
| 108.175.0.0/20 | 108.175.0.0 | 108.175.15.255 | 4,096 |
| 198.71.48.0/20 | 198.71.48.0 | 198.71.63.255 | 4,096 |
| 198.251.64.0/20 | 198.251.64.0 | 198.251.79.255 | 4,096 |
| 216.250.112.0/20 | 216.250.112.0 | 216.250.127.255 | 4,096 |
| 217.72.192.0/20 | 217.72.192.0 | 217.72.207.255 | 4,096 |
What traffic from 1&1 Internet means for a website
Every address in these 13 ranges belongs to 1&1 Internet infrastructure — virtual machines, containers, load balancers or edge nodes — rather than to an end-user's broadband or mobile line. A request from one of them is therefore a server talking to your server: a crawler, a monitoring probe, an API client, a scraper or a VPN/proxy exit hosted on 1&1 Internet.
That is why fraud and abuse systems treat datacenter origins differently from residential ones: a sign-up, a vote or an ad click from a 1&1 Internet address is unlikely to be an ordinary person at home. The sensible response is not a blanket block (legitimate bots and corporate VPNs live here too) but a lower trust score, stricter rate limits or a challenge.
To test a single address, run it through the proxy checker: it reports the datacenter match, the announcing network and whether the address also appears on Tor or blocklists. Proxy & VPN detector →
How this page is built
Ranges come from the open datacenter list (client9/ipcat) refreshed by our cron jobs; the announcing networks are looked up in iptoasn routing data and locations in DB-IP Lite (CC BY 4.0) using one address per sampled range. Counts are recomputed daily.