Spoofer Report for NANOG for Sep 2026

[CAIDA Spoofer Project via NANOG <nanog () lists nanog org>]

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 2026:
ASN    Name                                           Fixed-By
54334  SWIFTNODE-LLC                                  2026-09-08
21804  ACCESS-SK                                      2026-09-10
55016  IMPER-AS-1                                     2026-09-11
14051  SUREWEST                                       2026-09-13
12183  TALKIE-COMMUNICATIONS                          2026-09-14

Further information for the inferred remediation is available at:
https://spoofer.caida.org/remedy.php

Source Address Validation issues inferred during Sep 2026:
ASN    Name                           First-Spoofed Last-Spoofed
11427  TWC-11427-TEXAS                   2016-10-21   2026-09-03
22883  CONDENAST                         2019-05-29   2026-09-28
13781  ENERGYNET                         2020-04-15   2026-09-28
393397 LREC-LRT                          2020-08-02   2026-09-07
400282 UPX                               2023-04-27   2026-09-29
393577 TRITAN-DEVELOPMENT                2023-05-03   2026-09-29
13693  NTS-ONLINE                        2023-05-05   2026-09-12
394684 AS-GOLD                           2024-01-17   2026-09-28
27425  ASN-IDK-27425                     2024-02-21   2026-09-27
393530 TLU                               2024-05-22   2026-09-03
398182 BIGLINK                           2024-06-17   2026-09-29
40959  HOSTMASTER                        2024-09-16   2026-09-24
212238 CDNEXT                            2026-02-18   2026-09-24
20162  UTDALLAS                          2026-03-03   2026-09-29
25085  ALUE-NET                          2026-09-15   2026-09-29

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
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