Autonomous system
AS51265 MASSRESPONSE-AS2 Mass Response Service GmbH
Residential RIPE Cable/DSL/ISP
Summary
Spusu
mobile residential isp austria
MASSRESPONSE-AS is operated by Mass Response Service GmbH, the parent company of the Spusu telecommunications brand.
What it's used for
- The address space carries mobile and fixed dynamic subscriber traffic, evidenced by reverse DNS entries such as
mobiledyn-41-66-80-0.mrsn.atandfixeddyn-83-216-36-0.mrsn.at. - The AS announces 52,992 IPv4 addresses across 16 prefixes and 1 IPv6 prefix, while maintaining 82 observed routing neighbours.
- As a consumer telecommunications provider, the traffic consists of subscriber eyeballs for mobile data and fixed-line internet access in Austria and Italy.
Notable
- Registrants for the majority of prefixes are listed as "Mass Response Service GmbH" or "Mass Response abuse handling", aligning with the AS holder.
- The 41.66.64.0/18 block is registered to "BCS Group (BCSNet)" under the netname
ORG-BA1-AFRINIC, distinct from the primary Mass Response registrants. - The inventory includes a mix of large blocks like 41.66.64.0/18 and smaller subdivisions, with some prefixes showing "unknown" registrant data in the RDAP sample.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 5 exchanges in 4 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| LINX LON1 | London, United Kingdom | 195.66.225.126 |
| Peering.cz | Prague, Czech Republic | 185.0.20.89 |
| Vienna Internet Exchange | Vienna, Austria | 193.203.0.223 |
| Milan Neutral Access Point | Milan, Italy | 185.1.114.135 |
| ERA-IX Vienna | Vienna, Austria | 91.213.211.143 |
Transit providers
20 upstream, 1 downstream and 28 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 16 prefixes · 52.99K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| AT | Austria | 17 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS51265- Registry name
- MASSRESPONSE-AS
- Registrant
- MASSRESPONSE-MNT
- Abuse contact
- abuse@massresponse.com
- Registered
- 2010-07-06
- Last changed
- 2026-06-22
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Mass Response / spusu
- Also known as
- spusu
- Network type
- Cable/DSL/ISP
- Scope
- Europe
- Traffic ratio
- Mostly Inbound
- Peering policy
- Open
- IRR as-set
AS-MRS- Present at
- 5 exchanges
- Facilities
- 11 facilities
- Website
- http://www.massresponse.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 30 valid, 0 with no ROA
- ROAs
- 21 authorising AS51265
- ASPA
- no ASPA record
- IRR
- 100% registered · 30 of 30 announcements
- Route objects
- 45 naming AS51265
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere