https://amtrakoig.gov/sites/default/files/webform/foia_form/_sid_/United-Customer-Service-Number-united-Help-Desk-Contacts.pdf

https://forum.mova-tech.com/forum.php?mod=viewthread&tid=3724

https://images.finehomebuilding.com/app/uploads/2025/08/05175929/215030_1754431168_new-list-of-eva-air-customer-contact-numbers-in-usa-a-complete-step-by-step-guide.pdf

travel

https://community.cybozu.dev/t/topic/12110

https://forum.mova-tech.com/forum.php?mod=viewthread&tid=3726

https://discourse.libsdl.org/t/full-list-of-united-airlines-customer-contact-numbers-in-usa-2025-guide/61715

travel

https://community.cybozu.dev/t/topic/12108

https://forum.mova-tech.com/forum.php?mod=viewthread&tid=3612