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 23 IPv4 prefixes with 69,376 addresses and 1 IPv6 prefix, which makes it the 3,055th largest of 82,283 active autonomous systems by IPv4 space.

IPv4 addresses69,376in 23 prefixes
IPv6 prefixes1≈ 6.3 × 10²⁹ addresses
Size rank#3,055of 82,283 active ASNs
Abuser scoreLow0.09% of its addresses flagged · method

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

23 prefixes · 69,376 addresses
NetworkAddressesFirst – last address
41.66.64.0/1816,38441.66.64.0 – 41.66.127.255
197.211.128.0/1816,384197.211.128.0 – 197.211.191.255
62.240.128.0/198,19262.240.128.0 – 62.240.159.255
83.216.32.0/198,19283.216.32.0 – 83.216.63.255
83.216.32.0/204,09683.216.32.0 – 83.216.47.255
83.216.48.0/204,09683.216.48.0 – 83.216.63.255
62.240.144.0/212,04862.240.144.0 – 62.240.151.255
83.216.48.0/212,04883.216.48.0 – 83.216.55.255
62.240.140.0/221,02462.240.140.0 – 62.240.143.255
83.216.60.0/221,02483.216.60.0 – 83.216.63.255
178.157.4.0/221,024178.157.4.0 – 178.157.7.255
185.44.52.0/221,024185.44.52.0 – 185.44.55.255
185.69.244.0/221,024185.69.244.0 – 185.69.247.255
193.9.252.0/23512193.9.252.0 – 193.9.253.255
62.240.135.0/2425662.240.135.0 – 62.240.135.255
62.240.136.0/2425662.240.136.0 – 62.240.136.255
62.240.137.0/2425662.240.137.0 – 62.240.137.255
176.126.39.0/24256176.126.39.0 – 176.126.39.255
193.9.252.0/24256193.9.252.0 – 193.9.252.255
193.9.253.0/24256193.9.253.0 – 193.9.253.255
197.211.185.0/24256197.211.185.0 – 197.211.185.255
197.211.186.0/24256197.211.186.0 – 197.211.186.255
197.211.189.0/24256197.211.189.0 – 197.211.189.255

IPv6 prefixes

1 prefix
  • 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"

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