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 Mar 2022: ASN Name Fixed-By 36289 VALORCHRISTIANHIGHSCHOOL-01 2022-03-11 Further information for the inferred remediation is available at: https://spoofer.caida.org/remedy.php Source Address Validation issues inferred during Mar 2022: ASN Name First-Spoofed Last-Spoofed 54825 PACKET 2016-04-15 2022-03-14 209 CENTURYLINK-US-LEGACY-QWEST 2016-08-16 2022-03-24 6128 CABLE-NET-1 2016-09-03 2022-03-14 20412 CLARITY-TELECOM 2016-09-30 2022-03-31 6181 FUSE-NET 2016-10-10 2022-03-25 1403 EBOX 2016-11-12 2022-03-17 22898 ATLINK 2016-12-16 2022-03-30 812 ROGERS-COMMUNICATIONS 2017-01-04 2022-03-15 701 UUNET 2017-06-14 2022-03-24 63296 AWBROADBAND 2017-09-01 2022-03-22 33452 RW 2018-09-19 2022-03-26 8047 GCI 2019-04-11 2022-03-10 5078 ONENET-AS-1 2020-04-06 2022-03-22 398836 NP-NETWORKS 2021-03-12 2022-03-25 56207 Converge 2021-03-26 2022-03-31 22191 WILKES-COMM 2021-06-25 2022-03-13 399318 2021-08-29 2022-03-15 63457 EMPIRE-CONNECT 2021-09-08 2022-03-31 212934 AS_POTVIN 2021-10-03 2022-03-22 22773 ASN-CXA-ALL-CCI-22773-RDC 2021-10-24 2022-03-31 394437 PSLIGHTWAVE 2021-12-02 2022-03-12 62887 WHITESKY-COMMUNICATIONS 2021-12-03 2022-03-17 54201 WEWORK-MANAGEMENT-LLC 2021-12-16 2022-03-23 7896 NU 2022-01-12 2022-03-11 31939 GM-ATL 2022-03-03 2022-03-03 36289 VALORCHRISTIANHIGHSCHOOL-01 2022-03-08 2022-03-10 399065 DEFASTLINK 2022-03-12 2022-03-27 19752 HYDROONETELECOM 2022-03-13 2022-03-13 398371 ORANGE-COUNTY-BROADBAND-AUTHOR 2022-03-13 2022-03-13 32035 CCDT 2022-03-14 2022-03-14 47027 SEASIDE-COMM 2022-03-22 2022-03-22 33696 NEXTARRAY-ASN-01 2022-03-30 2022-03-30 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