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 Jun 2023: ASN Name Fixed-By 202400 2023-06-03 54825 PACKET 2023-06-04 27500 ICANN-MEETINGS 2023-06-10 19230 NANOG 2023-06-12 Further information for the inferred remediation is available at: https://spoofer.caida.org/remedy.php Source Address Validation issues inferred during Jun 2023: ASN Name First-Spoofed Last-Spoofed 6939 HURRICANE 2016-02-22 2023-06-06 19230 NANOG 2016-06-13 2023-06-12 209 CENTURYLINK-US-LEGACY-QWEST 2016-08-16 2023-06-29 20412 CLARITY-TELECOM 2016-09-30 2023-06-30 25787 ROWE-NETWORKS 2016-10-21 2023-06-30 10796 TWC-10796-MIDWEST 2016-10-24 2023-06-29 271 BCNET 2016-10-24 2023-06-24 1403 EBOX 2016-11-12 2023-06-06 852 ASN852 2017-04-16 2023-06-26 7122 MTS-ASN 2017-05-16 2023-06-17 701 UUNET 2017-06-14 2023-06-03 398836 2021-03-12 2023-06-27 22773 ASN-CXA-ALL-CCI-22773-RDC 2021-10-24 2023-06-19 26231 SFIA-ASN 2021-10-27 2023-06-09 46997 2021-12-22 2023-06-28 7896 NU 2022-01-12 2023-06-13 394414 E2WS 2022-05-08 2023-06-28 59 WISC-MADISON 2022-06-14 2023-06-19 32645 PIVOT 2022-06-16 2023-06-15 397086 GLOBAL-FRAG-NETWORKS-HOUSTON 2022-06-16 2023-06-27 21555 LHTC 2023-01-01 2023-06-09 399852 2023-02-16 2023-06-22 964 GONET-ASN-17 2023-03-15 2023-06-30 41378 KirinoNET 2023-03-23 2023-06-30 3701 NERONET 2023-04-18 2023-06-28 13693 NTS-ONLINE 2023-05-05 2023-06-30 202400 2023-05-08 2023-06-01 61461 Airtek Solutions C.A. 2023-05-13 2023-06-16 46690 SNET-FCC 2023-05-20 2023-06-26 272022 2023-06-02 2023-06-02 200063 CAMINI-IMPEX 2023-06-16 2023-06-30 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