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 2018: ASN Name First-Fixed 11232 MIDCO-NET 2018-03-28 40801 LEWISU-ROMEOVILLE 2018-03-28 33651 CMCS 2018-03-29 7018 ATT-INTERNET4 2018-03-31 Further information for the inferred remediation is available at: https://spoofer.caida.org/remedy.php Source Address Validation issues inferred during Mar 2018: ASN Name First-Spoofed Last-Spoofed 577 BACOM 2016-03-09 2018-03-31 7029 WINDSTREAM 2016-06-21 2018-03-20 209 CENTURYLINK-US-LEGACY-QWEST 2016-08-16 2018-03-25 11232 MIDCO-NET 2016-09-22 2018-03-24 20412 CLARITY-TELECOM 2016-09-30 2018-03-31 6181 FUSE-NET 2016-10-10 2018-03-25 62482 AS-LRCOMM 2016-10-21 2018-03-07 15305 SYRINGANETWORKS 2016-10-21 2018-03-28 25787 ROWE-NETWORKS 2016-10-21 2018-03-30 174 COGENT-174 2016-10-21 2018-03-28 271 BCNET-AS 2016-10-24 2018-03-23 32440 LONI 2016-11-03 2018-03-29 33182 DIMENOC 2016-11-08 2018-03-28 12083 WOW-INTERNET 2016-11-09 2018-03-29 5056 AUREON-5056 2016-11-10 2018-03-30 1403 EBOX 2016-11-12 2018-03-30 20105 URICHMOND 2016-11-15 2018-03-28 3549 LVLT-3549 2016-11-16 2018-03-29 54858 AS-SBI 2016-12-25 2018-03-27 2152 CSUNET-NW 2017-02-02 2018-03-31 21832 KELLINCOM-1 2017-02-03 2018-03-27 6461 ZAYO-6461 2017-06-21 2018-03-27 26793 ICS-LLC 2017-08-16 2018-03-25 30432 UBTANET 2017-08-23 2018-03-18 63296 AMARILLO-WIRELESS 2017-09-01 2018-03-27 7233 YAHOO-US 2017-09-07 2018-03-31 33523 ROWANUNIVERSITY 2017-10-29 2018-03-27 11796 AIRSTREAMCOMM-NET 2017-11-30 2018-03-26 12222 AKAMAI 2018-02-14 2018-03-29 14828 HBCI-1999TA 2018-02-19 2018-03-18 55236 CBC 2018-03-03 2018-03-30 3257 GTT-BACKBONE 2018-03-06 2018-03-26 29384 Qatar-Foundation 2018-03-08 2018-03-29 23148 TERRENAP 2018-03-15 2018-03-29 22452 NOMINUMII-GLOBAL-NET 2018-03-16 2018-03-16 226 LOS-NETTOS-AS 2018-03-26 2018-03-26 36045 COKCMO-CONVENTION-FACILITIES 2018-03-27 2018-03-27 54417 STIMULUS-TECHNOLOGIES 2018-03-29 2018-03-29 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