United Delivery Service, commonly known as UDS, is a regional parcel carrier and last-mile delivery company in the United States. The company began in the Chicago metropolitan area more than 50 years ago and has expanded its delivery network across the Midwest, supporting residential deliveries, business-to-business shipments, e-commerce orders, and time-sensitive courier services.
UDS operates through a network of regional hubs and delivery facilities in locations across Illinois, Indiana, and Wisconsin. Its official website presents the company as an alternative to large national carriers for businesses that need flexible routing, competitive shipping costs, personalized customer service, and faster regional delivery options.
The company provides same-day delivery, next-day delivery, routed delivery, freight delivery, on-demand courier services, customized routing, and delivery solutions for industries such as retail, e-commerce, healthcare, groceries, automotive businesses, meal kits, office supplies, banking, cosmetics, and small businesses.
UDS also provides real-time shipment visibility, estimated delivery information, text-message updates, and visual proof of delivery showing where a package was left. Recipients can Track United Delivery Service packages on 4tracking to follow available package tracking updates, while the official UDS tracking page can be used as an additional option.
How United Delivery Service shipment Tracking works
How to Track a United Delivery Service shipment
The easiest way to Track a United Delivery Service shipment is to use 4tracking. Enter the UDS tracking number, barcode, delivery-notice number, or shipment reference to check the latest available package tracking updates. This can help you follow the shipment from electronic label creation through facility processing, transportation, final-mile delivery, and delivery confirmation.
United Delivery Service also provides an official Track a Package page as a secondary option. Its official tracking form accepts a tracking number, barcode, delivery-notice number, or order reference number. Customers who receive a missed-delivery notice can use the delivery-notice number printed on that notice to search for the shipment.
A normal UDS Tracking journey may include Shipment Notification, Received, Out for Delivery, Delayed, Will-Call, Returned, and Delivered. The available events depend on where the package is in the delivery process and which service the sender selected.
What United Delivery Service tracking statuses mean
Shipment Notification means a shipping label has been created, but the parcel has not yet arrived at a UDS facility. Received means UDS has physically received the package. Out for Delivery means the parcel has left the warehouse and is travelling on a delivery route.
Delayed means the shipment has experienced an interruption or needs more time. Will-Call means the package has been sent to a UDS location for pickup. Returned means it is being sent back to the merchant, while Delivered means UDS recorded the delivery as completed.
Why UDS package tracking may pause
United Delivery Service package tracking may remain unchanged while a parcel is moving between regional facilities, waiting for sorting, assigned to a delivery route, or awaiting its next physical scan. A short pause does not necessarily mean that the shipment has been lost.
Tracking may also show only Shipment Notification when the merchant has created the label but has not yet handed the parcel to UDS. In that case, the next package tracking update normally appears after United Delivery Service receives and scans the package at one of its facilities.
United Delivery Service tracking number forms
Tracking number and barcode
United Delivery Service allows recipients to search by a tracking number or barcode. UDS does not publish one universal public character pattern for all tracking numbers, so the length and format may vary according to the merchant, shipment service, label system, or business integration used to create the delivery.
Recipients should copy the complete tracking number exactly as it appears in the merchant’s shipping email, order page, dispatch notification, parcel label, or text message. Avoid removing digits, changing letters, or adding unnecessary spaces.
Delivery-notice number
If a driver leaves a missed-delivery notice, the recipient can use the delivery-notice number printed on the notice to Track the package. Enter the complete number shown on the notice when searching on 4tracking or through the official UDS tracking service.
Order reference number
The official United Delivery Service tracking form also supports an order reference number. This may be a merchant reference, order identifier, or another code connected to the shipment. Its exact format depends on the sender’s system.
What to do when you receive multiple numbers
If an online store gives you an order number and a separate UDS tracking number, keep both references. Use the carrier tracking number for package tracking and keep the store order number for customer-service requests, refunds, replacements, or merchant investigations.
United Delivery Service shipment delivery time
How long United Delivery Service delivery takes
United Delivery Service delivery time depends on the service selected by the sender, the pickup time, origin and destination, package type, regional coverage, route schedule, and local operating conditions. UDS offers same-day and next-day services, but availability and exact delivery commitments depend on the shipment and service area.
UDS promotes next-day regional delivery as one of the main benefits of using a regional parcel carrier. A shipment collected and accepted for an eligible next-day service is normally scheduled to arrive on the following delivery day, subject to the sender’s service agreement and any unexpected operating delay.
For parcels marked Out for Delivery, UDS states that residential deliveries are normally serviced Monday through Friday between 8 a.m. and 8 p.m., although deliveries may sometimes occur later. Business deliveries are generally completed during normal business hours, and some packages may occasionally be delivered during the weekend.
United Delivery Service delivery-time examples
For example, an eligible same-day shipment collected early on Monday may be delivered later on Monday within the supported service area. The actual arrival time depends on the pickup schedule, route distance, service request, traffic, and package-handling requirements.
An eligible next-day package accepted by UDS on Monday may be delivered on Tuesday. If Monday only shows Shipment Notification because the merchant has not handed over the parcel, the practical transit time starts after UDS physically receives it.
A parcel marked Out for Delivery on Tuesday may arrive at a residential address between 8 a.m. and 8 p.m., and occasionally later. A business shipment is normally delivered during the recipient company’s regular operating hours.
Freight, scheduled-route, customized, or special delivery solutions may follow different transit times because they are planned around cargo size, route requirements, business schedules, and service agreements. For the most accurate estimate, Track the shipment on 4tracking and follow the latest UDS Tracking events.
What can delay a UDS shipment?
Delivery may be affected by severe weather, traffic, high parcel volumes, route changes, an incorrect or incomplete address, restricted building access, recipient unavailability, package damage, or operational disruption. A delay may also occur when the merchant prepares the label but does not make the package available for collection on time.
United Delivery Service services
Same-day delivery
UDS offers same-day delivery for eligible time-sensitive packages within supported service areas. Same-day service can be useful for urgent retail orders, healthcare items, business documents, replacement parts, floral products, groceries, and other shipments that cannot wait until the following day.
Next-day delivery
Next-day delivery is one of United Delivery Service’s core regional parcel services. It is designed to move packages quickly between locations in the company’s Midwest network and can provide regional businesses with faster ground-delivery performance.
Routed delivery
Routed delivery is designed for businesses that have recurring delivery needs. UDS can organize scheduled routes for regular deliveries between warehouses, retail locations, offices, healthcare facilities, businesses, and customers.
On-demand and rush courier service
United Delivery Service provides on-demand and rush courier solutions for urgent shipments. For rush deliveries, drivers may travel directly to the destination without making unnecessary stops, helping reduce the time required to complete the delivery.
Freight delivery
UDS also provides freight-delivery capabilities through facilities equipped with loading docks, secure loading areas, and material-handling equipment. Freight services may be suitable for larger shipments that cannot move through a normal small-parcel network.
Retail and e-commerce delivery
United Delivery Service works with retailers and online merchants that need regional last-mile delivery. Its technology supports package Tracking, estimated arrival information, delivery notifications, and proof of delivery that can improve visibility for both sellers and recipients.
Healthcare and prescription delivery
UDS provides time-sensitive delivery solutions for prescription drugs, medical supplies, surgical supplies, hospitals, pharmacies, and residential recipients. Its healthcare services include chain-of-custody procedures, real-time tracking visibility, signature capture, same-day delivery, next-day delivery, and scheduled routes.
Text updates and visual proof of delivery
United Delivery Service can provide text-message updates that notify recipients when a package has been delivered. Its Visual Proof of Delivery feature may show where the driver left the parcel, helping recipients locate deliveries placed near a side door, porch, garage, or another secure location.
Will-Call pickup
Some next-day shipments may be placed in Will-Call, allowing the recipient to collect the package from a UDS facility. Follow the Tracking instructions or contact the merchant or UDS support before travelling to the location.
How to contact United Delivery Service if there is a shipment issue
Official United Delivery Service support options
If you have a problem with a shipment, first Track the package on 4tracking and review the most recent event. This can help determine whether the parcel is waiting for merchant handover, received at a facility, out for delivery, delayed, placed in Will-Call, returned, or marked as delivered.
UDS directs recipients with tracking problems to the customer-support option available through its official Track a Package page. Business customers and companies interested in using UDS services can contact sales@uniteddeliveryservice.com. The UDS headquarters is located at 1 S 376 Summit Avenue, Suite 1F, Oakbrook Terrace, Illinois 60181.
When requesting assistance, prepare the tracking number, order reference, delivery-notice number if applicable, merchant name, recipient name, full delivery address, latest Tracking status, and a clear explanation of the problem.
Contact the merchant or sender first
If the package contains an online-store purchase, it is usually best to contact the merchant, seller, sender, or retailer first. The merchant created the shipment, selected the delivery service, and has access to the business account and shipping records connected to the order.
UDS states that delivery days and times are set by the merchant and cannot be changed directly by UDS. Cancellation requests must also be sent to the merchant. If a recent tracking number returns Barcode Not Found, the official FAQ recommends contacting the shipping merchant to verify the number.
The seller can confirm that the package was handed to UDS, verify the address and tracking details, open an investigation, and help arrange a replacement or refund when an order is missing, damaged, returned, or incorrectly marked as delivered.
Frequently asked questions about United Delivery Service shipment tracking issues
Why is my United Delivery Service tracking number not found?
The merchant may have created the shipping label without handing the package to UDS, the tracking number may have been entered incorrectly, or the shipment record may be older than the period available online. Confirm the number with the merchant and check it again later on 4tracking.
How long is UDS tracking information available?
United Delivery Service states that tracking information is available online for 30 days. If the tracking number is older than 30 days, its events may no longer appear in the public tracking system.
Can I Track United Delivery Service packages on 4tracking?
Yes. Enter the UDS tracking number, barcode, delivery-notice number, or available shipment reference on 4tracking to check package tracking events and delivery updates.
What does Shipment Notification mean?
Shipment Notification means the merchant or sender created a shipping label, but the package has not yet arrived at a United Delivery Service facility. Contact the merchant if this status remains unchanged longer than expected.
What does Received mean in UDS Tracking?
Received means United Delivery Service has physically received and scanned the package at one of its facilities. The parcel should continue through sorting and transportation before it is assigned to a final delivery route.
What does Out for Delivery mean?
Out for Delivery means the package has left the warehouse and is travelling with a driver for delivery. Residential packages are generally serviced between 8 a.m. and 8 p.m. on weekdays, although delivery may sometimes occur later.
What does Will-Call mean?
Will-Call means the package has been sent to a United Delivery Service facility for pickup. Review the Tracking information and confirm the pickup instructions before visiting the facility.
What does Returned mean?
Returned means the shipment is being sent back to the merchant. Contact the seller to ask why the package was returned and whether the order will be resent, replaced, or refunded.
Why is my UDS package tracking stuck?
The parcel may be moving between facilities, awaiting sorting, waiting for route assignment, or missing its next scan. A short Tracking gap is normal, but contact the merchant if the shipment remains unchanged beyond the expected delivery time.
When will my United Delivery Service package arrive?
Packages marked Out for Delivery are generally serviced Monday through Friday between 8 a.m. and 8 p.m., sometimes later. Business deliveries are usually completed during normal business hours, and occasional weekend delivery may occur.
Can I change the UDS delivery day or time?
United Delivery Service states that the delivery day and time are set by the merchant and cannot be changed directly by UDS. Contact the merchant or seller to ask whether another arrangement is available.
Can I cancel an order after it has been shipped with UDS?
Cancellation requests must be made through the merchant. Contact the seller or retailer that accepted the order because UDS does not cancel the commercial purchase directly.
What should I do if UDS says delivered but I cannot find the package?
Check the back porch, bushes, garage, side doors, building entrance, reception area, neighbors, household members, and other safe locations around the address. Visual Proof of Delivery may also help identify where the package was placed. If it remains missing, contact the merchant and UDS support.
Does United Delivery Service offer same-day delivery?
Yes. UDS provides same-day services for eligible shipments and locations. Availability depends on the pickup time, route, service area, package requirements, and sender agreement.
Does United Delivery Service offer next-day delivery?
Yes. Next-day regional delivery is one of UDS’s main services. An eligible package accepted on one business day may be scheduled for delivery on the next delivery day, subject to route and service conditions.
Where does United Delivery Service operate?
United Delivery Service is a Midwest regional carrier with locations across areas including Illinois, Indiana, and Wisconsin. Special delivery solutions outside its standard service area may be arranged for business customers.
Who should I contact first about an online-store order?
Contact the merchant, seller, sender, or retailer first because they created the shipment and control the order. Include your order number, UDS tracking number, delivery address, and latest 4tracking status when reporting the problem.