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 Apr 2025: ASN Name Fixed-By 7922 COMCAST-7922 2025-04-02 32489 AMANAHA-NEW 2025-04-02 33490 COMCAST-33490 2025-04-09 212219 2025-04-19 10708 SELECTNET 2025-04-22 6360 UNIVHAWAII 2025-04-28 Further information for the inferred remediation is available at: https://spoofer.caida.org/remedy.php Source Address Validation issues inferred during Apr 2025: ASN Name First-Spoofed Last-Spoofed 5650 FRONTIER-FRTR 2016-02-22 2025-04-05 7029 WINDSTREAM 2016-06-21 2025-04-15 40676 AS40676 2016-08-29 2025-04-30 27364 ACS-INTERNET 2016-09-27 2025-04-23 63296 AWBROADBAND 2017-09-01 2025-04-26 21804 ACCESS-SK 2019-06-09 2025-04-28 32035 CCDT 2021-06-09 2025-04-28 12183 TALKIE-COMMUNICATIONS 2022-12-10 2025-04-30 395418 ARIN-CHA 2023-04-14 2025-04-29 400282 2023-04-27 2025-04-30 393577 SCCNET 2023-05-03 2025-04-24 61461 Airtek Solutions C.A. 2023-05-13 2025-04-07 20119 ARROW 2023-10-19 2025-04-25 394684 WISPERNET 2024-01-17 2025-04-24 3801 MISNET 2024-09-09 2025-04-25 138915 KAOPU-HK 2025-03-30 2025-04-20 273843 2025-04-02 2025-04-29 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