Spoofer Report for NANOG for Sep 2025

[CAIDA Spoofer Project via NANOG <nanog () lists nanog org>]

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 usa, can.

Inferred improvements during Sep 2025:
 none inferred

Source Address Validation issues inferred during Sep 2025:
ASN    Name                           First-Spoofed Last-Spoofed
27364  ACS-INTERNET                      2016-09-27   2025-09-18
22883  CONDENAST                         2019-05-29   2025-09-29
21804  ACCESS-SK                         2019-06-09   2025-09-28
22773  ASN-CXA-ALL-CCI-22773-RDC         2021-10-24   2025-09-28
12183  TALKIE-COMMUNICATIONS             2022-12-10   2025-09-29
400282                                   2023-04-27   2025-09-24
393577 SCCNET                            2023-05-03   2025-09-30
61461  Airtek Solutions C.A.             2023-05-13   2025-09-24
20119  ARROW                             2023-10-19   2025-09-27
394684 WISPERNET                         2024-01-17   2025-09-26
393530 TLU                               2024-05-22   2025-09-28
27523  DMB-ASN                           2024-11-15   2025-09-25
54334  ROYA                              2025-03-13   2025-09-29
270158                                   2025-03-24   2025-09-16
273843                                   2025-04-02   2025-09-30

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

Please send any feedback or suggestions to spoofer-info () caida org
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