Autonomous system
AS57407 CKSOFT
Unclassified RIPE
Summary
CK Software GmbH
business security integration
CKSOFT is operated by CK Software GmbH.
What it's used for
- The address space carries corporate infrastructure, evidenced by the netnames
DE-CKSOFT-20170814andCKSOFT-DE-LANand the reverse DNS recordcrfra2.cksoft.de. - The AS announces 1536 IPv4 addresses across 2 prefixes and 2 IPv6 prefixes, while maintaining 23 observed neighbours; this ratio indicates a business network with significant peering relationships rather than a transit provider.
- Traffic from this AS consists of web and API endpoints, internal office systems, and network security services provided by the company as a system integrator for open-source software.
Notable
- Registrants for both announced prefixes are listed as
CK Software GmbH, which aligns directly with the AS holder. - The address inventory is compact, consisting of two distinct IPv4 blocks and two IPv6 prefixes, consistent with a single corporate entity's internal estate.
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 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| KleyReX Internet Exchange | Frankfurt, Germany | 193.189.82.175 |
Transit providers
8 upstream, 0 downstream and 12 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 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 1.54K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 4 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS57407- Registry name
- CKSOFT
- Registrant
- CKSOFT-MNT
- Abuse contact
- abuse@cksoft.de
- Registered
- 2011-10-18
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 4 valid, 0 with no ROA
- ROAs
- 4 authorising AS57407
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 4 naming AS57407
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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: 442 networks and 1,781 prefixes, as published 2026-10-16. 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