Autonomous System
AS51265 Mass Response Service GmbH
HostingActiveAustriaRIPE
AS51265 (MASSRESPONSE-AS) is a hosting network operated by Mass Response Service GmbH in Austria, registered with RIPE. It has 22 IPv4 prefixes with 68,352 addresses and 1 IPv6 prefix, which makes it the 3,110th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses68,352in 22 prefixes
IPv6 prefixes1≈ 6.3 × 10²⁹ addresses
Size rank#3,110of 82,200 active ASNs
Details
OrganizationMass Response Service GmbH · hosting provider profile
AS nameMASSRESPONSE-AS
Websitemassresponse.com
Country Austria (AT)
Network typeHosting
RegistryRIPE
Abuse contactabuse@massresponse.com
Registered2010-07-06
Last updated2026-06-22
IPv4 prefixes
22 prefixes · 68,352 addresses| Network | Addresses | First – last address |
|---|---|---|
| 41.66.64.0/18 | 16,384 | 41.66.64.0 – 41.66.127.255 |
| 197.211.128.0/18 | 16,384 | 197.211.128.0 – 197.211.191.255 |
| 62.240.128.0/19 | 8,192 | 62.240.128.0 – 62.240.159.255 |
| 83.216.32.0/19 | 8,192 | 83.216.32.0 – 83.216.63.255 |
| 83.216.32.0/20 | 4,096 | 83.216.32.0 – 83.216.47.255 |
| 83.216.48.0/20 | 4,096 | 83.216.48.0 – 83.216.63.255 |
| 62.240.144.0/21 | 2,048 | 62.240.144.0 – 62.240.151.255 |
| 83.216.48.0/21 | 2,048 | 83.216.48.0 – 83.216.55.255 |
| 83.216.60.0/22 | 1,024 | 83.216.60.0 – 83.216.63.255 |
| 178.157.4.0/22 | 1,024 | 178.157.4.0 – 178.157.7.255 |
| 185.44.52.0/22 | 1,024 | 185.44.52.0 – 185.44.55.255 |
| 185.69.244.0/22 | 1,024 | 185.69.244.0 – 185.69.247.255 |
| 193.9.252.0/23 | 512 | 193.9.252.0 – 193.9.253.255 |
| 62.240.135.0/24 | 256 | 62.240.135.0 – 62.240.135.255 |
| 62.240.136.0/24 | 256 | 62.240.136.0 – 62.240.136.255 |
| 62.240.137.0/24 | 256 | 62.240.137.0 – 62.240.137.255 |
| 176.126.39.0/24 | 256 | 176.126.39.0 – 176.126.39.255 |
| 193.9.252.0/24 | 256 | 193.9.252.0 – 193.9.252.255 |
| 193.9.253.0/24 | 256 | 193.9.253.0 – 193.9.253.255 |
| 197.211.185.0/24 | 256 | 197.211.185.0 – 197.211.185.255 |
| 197.211.186.0/24 | 256 | 197.211.186.0 – 197.211.186.255 |
| 197.211.189.0/24 | 256 | 197.211.189.0 – 197.211.189.255 |
41.66.64.0/18 197.211.128.0/18 62.240.128.0/19 83.216.32.0/19 83.216.32.0/20 83.216.48.0/20 62.240.144.0/21 83.216.48.0/21 83.216.60.0/22 178.157.4.0/22 185.44.52.0/22 185.69.244.0/22 193.9.252.0/23 62.240.135.0/24 62.240.136.0/24 62.240.137.0/24 176.126.39.0/24 193.9.252.0/24 193.9.253.0/24 197.211.185.0/24 197.211.186.0/24 197.211.189.0/24
IPv6 prefixes
1 prefix- 2a04:9540::/29
2a04:9540::/29
Query AS51265 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=AS51265&key=YOUR_API_KEY"Any address in its prefixes resolves to AS51265, with or without a key:
curl "https://api.ipapi.is/?q=41.66.64.1"Largest networks in Austria
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