Spoofer Report for NANOG for Dec 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 Dec 2025:
ASN    Name                                           Fixed-By
4901   CAAREN                                         2025-12-04
393397 LREC-LRT                                       2025-12-05

Further information for the inferred remediation is available at:
https://spoofer.caida.org/remedy.php

Source Address Validation issues inferred during Dec 2025:
ASN    Name                           First-Spoofed Last-Spoofed
7029   WINDSTREAM                        2016-06-21   2025-12-06
32329  MONKEYBRAINS                      2018-11-28   2025-12-04
22883  CONDENAST                         2019-05-29   2025-12-10
21804  ACCESS-SK                         2019-06-09   2025-12-28
36352  AS-COLOCROSSING                   2020-10-08   2025-12-25
55016  IMPER-AS-1                        2021-05-18   2025-12-27
22773  ASN-CXA-ALL-CCI-22773-RDC         2021-10-24   2025-12-18
12183  TALKIE-COMMUNICATIONS             2022-12-10   2025-12-26
400282                                   2023-04-27   2025-12-26
393577 SCCNET                            2023-05-03   2025-12-25
394684 AS-GOLD                           2024-01-17   2025-12-27
27425  ASN-IDK-27425                     2024-02-21   2025-12-22
53755  IOFLOOD                           2024-02-23   2025-12-26
393530 TLU                               2024-05-22   2025-12-30
19935  CRRS                              2024-05-29   2025-12-16
273143                                   2025-01-22   2025-12-27
54334  ROYA                              2025-03-13   2025-12-29
273843                                   2025-04-02   2025-12-25
204969 AS_CIRTEL                         2025-10-22   2025-12-07
22890  NCC-OMAHA                         2025-12-06   2025-12-06
399728 PFOUNDATION                       2025-12-10   2025-12-10
32425  SKB3-ARIN-BGP                     2025-12-12   2025-12-12

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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