Caterpillar employees and procurement team members could get in touch with Regional Buying Center team members by calling the helpline numbers below:
| Region | Country | Helpdesk Number | Working Hours |
| Americas | US | +1 3096365995 | 8 AM - 5 PM (CT) |
| Mexico | +52 8183193588 | 8 AM - 5 PM (CT) | |
| Brazil | +55 1921061500 | 8 AM - 5 PM (CT) | |
| APAC | China | +86 51681901000 | 8 AM - 5 PM |
| India | +91 44 7106 9013 | 9 AM - 6 PM | |
| Japan | +81 785563001 | 9 AM - 6 PM | |
| Thailand | +66 33011414 | 7:30 AM - 4:30 PM | |
| Indonesia | +62218239890 | 7:30 AM - 4:30 PM | |
| Singapore | +65 6829 3198 or + 65 7337 3198 | 8:30 AM - 5:30 PM | |
| Australia | +61 399539100 | 10 AM - 7 PM (ACST) | |
| EAME | Netherlands | +31 736399750 | 9 AM - 6 PM CET |
| Poland | +48 32 368 4040 | 9 AM - 6 PM CET | |
| Russia | +74952133381 | 9 AM - 6 PM CET | |
| South Africa | +27 11 961 5101 | 9 AM - 6 PM CET | |
| Spain | +34 952418850 | 9 AM - 6 PM CET | |
| UAE | +971 48106557 | 6:30 AM - 3:30 PM local time | |
| UK | +44 1455 825 100 | 9 AM - 6 PM CET | |
| Hungary | +36 28523740 | 9 AM - 6 PM CET | |
| Italy | +39 0541824540 | 9 AM - 6 PM CET | |
| Switzerland | +41228494677 | 9 AM - 6 PM CET | |
| Belgium | +3222544739 | 9 AM - 6 PM CET | |
| France | +33476237978 | 9 AM - 6 PM CET |