Autonomous System
AS29056 Citycom Telekommunikation GmbH
ISPActiveAustriaRIPE
AS29056 (CITYCOM-AS) is an ISP network operated by Citycom Telekommunikation GmbH in Austria, registered with RIPE. It has 17 IPv4 prefixes with 33,280 addresses and 1 IPv6 prefix, which makes it the 5,212th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses33,280in 17 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#5,212of 82,200 active ASNs
Details
OrganizationCitycom Telekommunikation GmbH
AS nameCITYCOM-AS
Websitecitycom.at
Country Austria (AT)
Network typeISP
RegistryRIPE
Abuse contactabuse@grazkom.at
Registered2003-05-21
Last updated2026-08-11
IPv4 prefixes
17 prefixes · 33,280 addresses| Network | Addresses | First – last address |
|---|---|---|
| 85.237.0.0/19 | 8,192 | 85.237.0.0 – 85.237.31.255 |
| 37.143.176.0/20 | 4,096 | 37.143.176.0 – 37.143.191.255 |
| 91.143.96.0/20 | 4,096 | 91.143.96.0 – 91.143.111.255 |
| 109.73.144.0/20 | 4,096 | 109.73.144.0 – 109.73.159.255 |
| 217.29.144.0/20 | 4,096 | 217.29.144.0 – 217.29.159.255 |
| 185.15.236.0/22 | 1,024 | 185.15.236.0 – 185.15.239.255 |
| 185.220.252.0/22 | 1,024 | 185.220.252.0 – 185.220.255.255 |
| 185.222.128.0/22 | 1,024 | 185.222.128.0 – 185.222.131.255 |
| 185.225.144.0/22 | 1,024 | 185.225.144.0 – 185.225.147.255 |
| 185.228.128.0/22 | 1,024 | 185.228.128.0 – 185.228.131.255 |
| 185.233.144.0/22 | 1,024 | 185.233.144.0 – 185.233.147.255 |
| 185.236.72.0/22 | 1,024 | 185.236.72.0 – 185.236.75.255 |
| 195.88.238.0/23 | 512 | 195.88.238.0 – 195.88.239.255 |
| 77.75.23.0/24 | 256 | 77.75.23.0 – 77.75.23.255 |
| 91.208.56.0/24 | 256 | 91.208.56.0 – 91.208.56.255 |
| 193.46.248.0/24 | 256 | 193.46.248.0 – 193.46.248.255 |
| 194.110.78.0/24 | 256 | 194.110.78.0 – 194.110.78.255 |
85.237.0.0/19 37.143.176.0/20 91.143.96.0/20 109.73.144.0/20 217.29.144.0/20 185.15.236.0/22 185.220.252.0/22 185.222.128.0/22 185.225.144.0/22 185.228.128.0/22 185.233.144.0/22 185.236.72.0/22 195.88.238.0/23 77.75.23.0/24 91.208.56.0/24 193.46.248.0/24 194.110.78.0/24
IPv6 prefixes
1 prefix- 2a02:758::/32
2a02:758::/32
Query AS29056 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=AS29056&key=YOUR_API_KEY"Any address in its prefixes resolves to AS29056, with or without a key:
curl "https://api.ipapi.is/?q=85.237.0.1"Largest networks in Austria
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