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 May 2026: ASN Name Fixed-By 53755 IOFLOOD 2026-05-07 44620 2026-05-30 Further information for the inferred remediation is available at: https://spoofer.caida.org/remedy.php Source Address Validation issues inferred during May 2026: ASN Name First-Spoofed Last-Spoofed 3356 LEVEL3 2016-03-06 2026-05-10 25660 CTC 2017-01-11 2026-05-09 14051 SUREWEST 2017-10-26 2026-05-25 22883 CONDENAST 2019-05-29 2026-05-11 21804 ACCESS-SK 2019-06-09 2026-05-28 52643 N&G Tecnologia LTDA 2019-09-24 2026-05-14 13781 ENERGYNET 2020-04-15 2026-05-11 393397 LREC-LRT 2020-08-02 2026-05-09 55016 IMPER-AS-1 2021-05-18 2026-05-17 22773 ASN-CXA-ALL-CCI-22773-RDC 2021-10-24 2026-05-23 26231 SFIA-ASN 2021-10-27 2026-05-18 12183 TALKIE-COMMUNICATIONS 2022-12-10 2026-05-31 400282 2023-04-27 2026-05-26 393577 SCCNET 2023-05-03 2026-05-30 394684 AS-GOLD 2024-01-17 2026-05-31 27425 ASN-IDK-27425 2024-02-21 2026-05-30 393530 TLU 2024-05-22 2026-05-27 265561 LANTOINTERNET SA DE CV 2024-09-06 2026-05-14 273143 2025-01-22 2026-05-19 54334 ROYA 2025-03-13 2026-05-29 273843 2025-04-02 2026-05-30 204969 AS_CIRTEL 2025-10-22 2026-05-28 212238 CDNEXT 2026-02-18 2026-05-28 20162 UTDALLAS 2026-03-03 2026-05-11 13427 SOFTCOM 2026-04-18 2026-05-02 197904 CAB-CALL-COMMUNICATIONS 2026-05-18 2026-05-18 199566 INIC 2026-05-20 2026-05-20 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 [email protected] _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/LMFUUNZ2QG2UDMGCACUD4MG6OTWDEFSO/
