Autonomous System
AS57154 Stadtwerke Konstanz GmbH
ISPActiveGermanyRIPE
AS57154 (SWKN) is an ISP network operated by Stadtwerke Konstanz GmbH in Germany, registered with RIPE. It has 7 IPv4 prefixes with 16,640 addresses and 1 IPv6 prefix, which makes it the 7,685th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses16,640in 7 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#7,685of 82,200 active ASNs
Details
OrganizationStadtwerke Konstanz GmbH
AS nameSWKN
Websitestadtwerke-konstanz.de
Country Germany (DE)
Network typeISP
RegistryRIPE
Abuse contactabuse@tk-bodensee.net
Registered2011-08-05
Last updated2026-02-17
IPv4 prefixes
7 prefixes · 16,640 addresses| Network | Addresses | First – last address |
|---|---|---|
| 213.152.96.0/19 | 8,192 | 213.152.96.0 – 213.152.127.255 |
| 5.10.8.0/21 | 2,048 | 5.10.8.0 – 5.10.15.255 |
| 31.47.80.0/21 | 2,048 | 31.47.80.0 – 31.47.87.255 |
| 88.133.248.0/21 | 2,048 | 88.133.248.0 – 88.133.255.255 |
| 185.36.44.0/22 | 1,024 | 185.36.44.0 – 185.36.47.255 |
| 185.80.168.0/22 | 1,024 | 185.80.168.0 – 185.80.171.255 |
| 193.102.25.0/24 | 256 | 193.102.25.0 – 193.102.25.255 |
213.152.96.0/19 5.10.8.0/21 31.47.80.0/21 88.133.248.0/21 185.36.44.0/22 185.80.168.0/22 193.102.25.0/24
IPv6 prefixes
1 prefix- 2a03:80::/32
2a03:80::/32
Query AS57154 with the API
The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.
curl "https://api.ipapi.is/?q=AS57154&key=YOUR_API_KEY"Any address in its prefixes resolves to AS57154, with or without a key:
curl "https://api.ipapi.is/?q=213.152.96.1"Largest networks in Germany
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