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 Sep 2019: ASN Name Fixed-By 13427 SOFTCOM-INTERNET-COMMUNICATION 2019-09-12 3807 UMTNET-ASN 2019-09-16 8047 GCI 2019-09-16 225 VIRGINIA 2019-09-18 16787 CHARTER-16787-DC 2019-09-23 22402 NEXTCO 2019-09-23 2828 XO-AS15 2019-09-26 Further information for the inferred remediation is available at: https://spoofer.caida.org/remedy.php Source Address Validation issues inferred during Sep 2019: ASN Name First-Spoofed Last-Spoofed 40065 CNSERVERS 2016-05-01 2019-09-04 209 CENTURYLINK-US-LEGACY-QWEST 2016-08-16 2019-09-25 6128 CABLE-NET-1 2016-09-03 2019-09-25 27364 ACS-INTERNET 2016-09-27 2019-09-19 20412 CLARITY-TELECOM 2016-09-30 2019-09-27 6181 FUSE-NET 2016-10-10 2019-09-29 15305 SYRINGANETWORKS 2016-10-21 2019-09-19 14971 PINETEL 2016-10-21 2019-09-19 25787 ROWE-NETWORKS 2016-10-21 2019-09-29 174 COGENT-174 2016-10-21 2019-09-26 32440 LONI 2016-11-03 2019-09-26 12083 WOW-INTERNET 2016-11-09 2019-09-30 39939 RISE-CO-AS39939 2016-11-11 2019-09-12 1403 EBOX 2016-11-12 2019-09-27 2828 XO-AS15 2016-11-21 2019-09-11 9009 M247 2017-01-10 2019-09-04 701 UUNET 2017-06-14 2019-09-30 63296 AMARILLO-WIRELESS 2017-09-01 2019-09-27 546 PARSONS-PGS-1 2017-11-20 2019-09-12 54540 INCERO-HVVC 2018-01-15 2019-09-16 12222 AKAMAI 2018-02-14 2019-09-30 4201 ORST 2018-04-19 2019-09-25 11827 WSU 2018-05-07 2019-09-26 19016 WCG 2018-05-19 2019-09-01 225 VIRGINIA 2018-06-18 2019-09-27 33452 RW 2018-09-19 2019-09-28 20448 VPNTRANET-LLC 2018-09-20 2019-09-10 63275 RADIOWIRE 2019-02-07 2019-09-23 15290 ALLST-15290 2019-04-09 2019-09-19 8047 GCI 2019-04-11 2019-09-24 10745 ARIN-ASH-CHA 2019-04-29 2019-09-30 38235 MEKONGNET-ADC 2019-05-09 2019-09-22 32 STANFORD 2019-08-21 2019-09-24 21709 IMPLEX-NET 2019-09-24 2019-09-24 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