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 Oct 2018: ASN Name Fixed-By 14361 HOPONE-GLOBAL 2018-10-03 7233 YAHOO-US 2018-10-04 237 MERIT-AS-14 2018-10-05 4 ISI 2018-10-10 15176 AS-INOC 2018-10-17 3356 LEVEL3 2018-10-24 10326 WORCESTER-1 2018-10-29 Further information for the inferred remediation is available at: https://spoofer.caida.org/remedy.php Source Address Validation issues inferred during Oct 2018: ASN Name First-Spoofed Last-Spoofed 5650 FRONTIER-FRTR 2016-02-22 2018-10-04 577 BACOM 2016-03-09 2018-10-27 18978 ENZUINC-US 2016-04-15 2018-10-26 54825 PACKET 2016-04-15 2018-10-11 7922 COMCAST-7922 2016-06-04 2018-10-09 19230 NANOG 2016-06-13 2018-10-04 7029 WINDSTREAM 2016-06-21 2018-10-30 209 CENTURYLINK-US-LEGACY-QWEST 2016-08-16 2018-10-28 6128 CABLE-NET-1 2016-09-03 2018-10-31 20412 CLARITY-TELECOM 2016-09-30 2018-10-31 6181 FUSE-NET 2016-10-10 2018-10-30 15305 SYRINGANETWORKS 2016-10-21 2018-10-27 25787 ROWE-NETWORKS 2016-10-21 2018-10-26 174 COGENT-174 2016-10-21 2018-10-31 2828 XO-AS15 2016-10-25 2018-10-06 31857 PRIORITY-TERABIT 2016-10-25 2018-10-19 30341 SCTA-ASN 2016-10-31 2018-10-14 32440 LONI 2016-11-03 2018-10-29 33182 DimeNOC 2016-11-08 2018-10-25 12083 WOW-INTERNET 2016-11-09 2018-10-27 3549 LVLT-3549 2016-11-16 2018-10-03 21832 KELLINCOM-1 2017-02-03 2018-10-26 7122 MTS-ASN 2017-05-16 2018-10-25 6461 ZAYO-6461 2017-06-21 2018-10-31 63296 AMARILLO-WIRELESS 2017-09-01 2018-10-30 7233 YAHOO-US 2017-09-07 2018-10-31 33523 ROWANUNIVERSITY 2017-10-29 2018-10-31 2152 CSUNET-NW 2017-11-08 2018-10-10 546 PARSONS-PGS-1 2017-11-20 2018-10-10 12222 AKAMAI 2018-02-14 2018-10-27 29384 Qatar-Foundation 2018-03-08 2018-10-25 23148 TERRENAP 2018-03-15 2018-10-30 20009 WADSNET 2018-04-13 2018-10-19 4201 ORST 2018-04-19 2018-10-29 11827 WSU 2018-04-19 2018-10-31 393564 SPOKANE 2018-06-05 2018-10-03 35911 BNQ-1 2018-06-06 2018-10-21 225 VIRGINIA 2018-06-18 2018-10-30 53646 HARRIS-BROADBAND 2018-08-10 2018-10-02 40911 L2NC 2018-08-31 2018-10-15 2381 WISCNET1 2018-09-04 2018-10-31 54804 CSMIII-BUNKIELA 2018-09-15 2018-10-16 33452 RW 2018-09-19 2018-10-14 20448 VPNTRANET-LLC 2018-09-20 2018-10-12 11996 LOBOIS 2018-09-24 2018-10-16 10326 WORCESTER-1 2018-09-30 2018-10-05 10929 NETELLIGENT 2018-10-02 2018-10-03 36210 SFCF 2018-10-13 2018-10-13 36327 VINAKOM 2018-10-16 2018-10-16 14031 SCXY 2018-10-18 2018-10-26 19919 VSW 2018-10-23 2018-10-30 22462 NOLA-BROADBAND-INC 2018-10-30 2018-10-30 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