The scammers stole the name from TNT Express.
From the fake courier website:
TNT Service Line International Logistics Delivery Service opened in the late 2000's with a small customer database, operating as a fully licensed customs clearing company round the world.
Contact details:
+447520631789
Number billable as mobile number
Country or destination United Kingdom
Original network provider* Tismi BV
+15807896271
Number billable as
geographic numberCountry or destination United States
City or exchange location Blackwell, OK
Original network provider* Level 3 Communications, Llc - Ok
+19173100718
Number billable as
geographic numberCountry or destination United States
City or exchange location New York City, NY
Original network provider* Bandwidth.com Clec, Llc - Ny
From the domain name registration:
Domain Name: TNTSERVICELINE.COM
Updated Date: 2021-06-09
Creation Date: 2021-04-09 Registrar Registration Expiration Date: 2022-04-09
Registrar: PDR Ltd. d/b/a PublicDomainRegistry.com
Registry Registrant ID: Not Available From Registry
Registrant Name: Domain Admin
Registrant Organization: Privacy Protect, LLC (PrivacyProtect.org)
This is what the fake courier website looks like: