[NLNOG] Spoofer Report for NLNOG for Jul 2026

[CAIDA Spoofer Project]

In response to feedback from operational security communities,
CAIDA's source address validation measurement project
(https://spoofer.caida.org) is automatically generating monthly
reports of ASes originating prefixes in BGP for systems from which
we received packets with a spoofed source address.
We are publishing these reports to network and security operations
lists in order to ensure this information reaches operational
contacts in these ASes.

This report summarises tests conducted within nld.

Inferred improvements during Jul 2026:
 none inferred

Source Address Validation issues inferred during Jul 2026:
ASN    Name                           First-Spoofed Last-Spoofed
39647  REDHOSTING                        2019-12-02   2026-07-11
3920   IMS-RTFM                          2023-10-06   2026-07-04
39686  ASN-EUROFIBER                     2025-04-28   2026-07-14
35316  PRODACOM                          2025-12-17   2026-07-27
60781  LEASEWEB-NL-AMS-01                2026-02-08   2026-07-05
906                                      2026-03-14   2026-07-26
32519  DMITI-SERVICES                    2026-03-28   2026-07-11
6206   PARK-3                            2026-04-30   2026-07-31
204983 Cyberfusion                       2026-07-07   2026-07-07
47216  CVKS-MSK-IX                       2026-07-11   2026-07-19

Further information for these tests where we received spoofed
packets is available at:
https://spoofer.caida.org/recent_tests.php?country_include=nld&no_block=1

Please send any feedback or suggestions to spoofer-info at caida.org