Spoofer Report for NANOG for Aug 2026

[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 Aug 2026:
ASN    Name                                           Fixed-By
32489  AMANAHA-NEW                                    2026-08-09
64289  MACARNE                                        2026-08-28

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

Source Address Validation issues inferred during Aug 2026:
ASN    Name                           First-Spoofed Last-Spoofed
10796  TWC-10796-MIDWEST                 2016-10-24   2026-08-18
27501  ISPNET                            2017-06-25   2026-08-06
14051  SUREWEST                          2017-10-26   2026-08-30
22883  CONDENAST                         2019-05-29   2026-08-25
21804  ACCESS-SK                         2019-06-09   2026-08-27
12183  TALKIE-COMMUNICATIONS             2022-12-10   2026-08-31
400282 UPX                               2023-04-27   2026-08-25
394684 AS-GOLD                           2024-01-17   2026-08-30
27425  ASN-IDK-27425                     2024-02-21   2026-08-26
393530 TLU                               2024-05-22   2026-08-27
54334  SWIFTNODE-LLC                     2025-03-13   2026-08-26
273843 AS273843                          2025-04-02   2026-08-25
212238 CDNEXT                            2026-02-18   2026-08-27
20162  UTDALLAS                          2026-03-03   2026-08-31
269749 AS269749                          2026-05-29   2026-08-19
214329 BGP-Network                       2026-08-14   2026-08-14

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
_______________________________________________
NANOG mailing list 
https://lists.nanog.org/archives/list/nanog () lists nanog org/message/RVOBZLCXEXYJAN6RR46KCFBXBM3PKQCB/