It's possible to track a lost package without a tracking number, although it might be difficult. If you have an account with the courier company that delivered your item, they may be able to help you locate it. This is especially true for companies such as FedEx or UPS which offer comprehensive tracking services. You can also check with local post offices and customs offices in case the package has been delayed due to international shipping regulations. Additionally, there are third-party tracking services available online which allow you to search for your missing item using either the sender’s name or address information. Finally, if all else fails contact customer service at the shipper’s website directly and provide them with any relevant details about what was shipped so they can assist in locating your item.