AS51265 MASSRESPONSE-AS Mass Response Service GmbH

MASSRESPONSE-AS Mass Response Service GmbH · registered in Austria

IPv4 addresses52,99216 prefixes · 0.002% of announced IPv4

Rank in Austria#39largest network in AT by IPv4 space, of 619 · 0.51% of AT

Rank worldwide#3,826of 79,396 networks with IPv4

IPv68 x /32 (524,288 x /48)1 prefixes

CountryAustria646 ASNs registered there

Open AS51265 in ASN lookup Look up an IP in this network (41.66.64.1) All networks in Austria

IPv4 prefixes

All 16 prefixes, in address order.

41.66.64.0/18
62.240.128.0/19
83.216.32.0/20
83.216.48.0/21
83.216.56.0/21
176.126.39.0/24
178.157.4.0/22
185.44.52.0/22
185.69.244.0/22
193.9.252.0/23
197.211.128.0/19
197.211.160.0/20
197.211.176.0/21
197.211.184.0/22
197.211.188.0/23
197.211.190.0/23

IPv6 prefixes

All 1 prefix.

2a04:9540::/29

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IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources