If you’re anxiously tracking a USPS package, you may see the status update ‘Processed through ISC San Francisco.’ If you’re short on time, here’s the quick answer: This means your package has been processed by the USPS International Service Center (ISC) facility in San Francisco, a key hub for USPS international mail.

In this comprehensive guide, we’ll explain what an ISC is, provide details on the San Francisco facility, and walk through what the ‘Processed through ISC San Francisco’ scan means for your package’s journey. We’ll also provide tips for understanding other common USPS tracking updates.

Understanding USPS International Service Centers

When it comes to shipping packages internationally, you may have come across the status update “Processed Through ISC San Francisco” or similar messages. But what exactly does this mean? To understand this, it’s important to have a clear understanding of USPS International Service Centers (ISCs).

What is an ISC?

An International Service Center (ISC) is a facility operated by the United States Postal Service (USPS) that plays a vital role in processing international mail. These centers are strategically located across the United States and serve as gateways for packages entering or leaving the country.

ISCs are responsible for processing and clearing mail items that are destined for other countries or have arrived from abroad. They handle a large volume of packages and are equipped with advanced technology and equipment to efficiently process and sort international mail.

Key ISC Facilities in the US

There are several ISC facilities located throughout the United States, each serving specific regions. Some of the key ISC facilities include:

  • ISC New York – Located in Jamaica, New York, this facility handles a significant portion of international mail for the East Coast.
  • ISC Los Angeles – Situated in Los Angeles, California, this facility is responsible for processing mail items in the western region of the country.
  • ISC Chicago – Located in Chicago, Illinois, this facility serves as a major processing center for international mail in the Midwest.
  • ISC Miami – Situated in Miami, Florida, this facility plays a crucial role in handling international mail for the southeastern region of the United States.

These ISC facilities, along with others, work together to ensure that international mail flows smoothly and efficiently across the country.

Role in Processing International Mail

ISCs play a crucial role in the processing of international mail. When a package enters the United States from another country, it goes through customs clearance at the ISC. Here, customs officials inspect the package to ensure compliance with import regulations and assess any applicable duties or taxes.

Once the package clears customs, it is processed and sorted by the ISC. The package is then forwarded to its final destination within the United States or sent to another ISC for further processing if it is destined for another country.

During the processing stage, the package undergoes various checks, including scanning, weighing, and sorting. This ensures that the package is correctly labeled and ready for delivery to its intended recipient.

It’s important to note that the “Processed Through ISC San Francisco” status update or any other ISC mentioned in your tracking information simply indicates that your package has reached one of these International Service Centers and is being processed as part of its journey to its final destination.

It does not necessarily mean that there is a delay or an issue with your package.

For more information on USPS International Service Centers and how they function, you can visit the official USPS website at www.usps.com.

A Closer Look at the San Francisco ISC

When it comes to international mail and packages, the San Francisco International Service Center (ISC) plays a crucial role in processing and facilitating their journey. Let’s take a closer look at this important facility and understand what happens when your package is “Processed Through ISC San Francisco.”

Size and Capabilities

The San Francisco ISC is one of the largest postal facilities in the United States. Located near the San Francisco International Airport, it spans over a vast area and is equipped with state-of-the-art machinery and advanced technology to handle a high volume of mail and packages efficiently.

The facility employs a dedicated team of postal workers who ensure that every item passing through the ISC is processed accurately and swiftly.

The San Francisco ISC is a significant hub for international shipments, serving as a gateway for packages entering or leaving the United States. It handles a wide range of items, including letters, documents, parcels, and even larger freight shipments.

The facility is designed to accommodate various types of mail, from small envelopes to oversized packages, ensuring that everything is processed smoothly.

Inbound vs. Outbound Mail

The San Francisco ISC plays a crucial role in both inbound and outbound mail operations. Inbound mail refers to packages and letters that are arriving from other countries and are destined for recipients within the United States.

This includes items purchased online, personal correspondence, and business documents. The ISC carefully inspects and processes these incoming items, ensuring that they meet all customs requirements and are ready for delivery to their final destinations across the country.

On the other hand, outbound mail consists of packages and letters that are leaving the United States and heading to international destinations. This includes items being sent by individuals or businesses to recipients in other countries.

The ISC in San Francisco efficiently processes and prepares these outgoing shipments, verifying customs documentation and ensuring that they are ready for transport to their respective destinations.

Volume Processed

The volume of mail and packages processed through the San Francisco ISC is truly astounding. On any given day, thousands of items pass through the facility, representing a wide range of destinations and origins.

The ISC operates around the clock, tirelessly sorting, scanning, and routing packages to ensure that they reach their intended recipients as quickly as possible.

The high volume of mail that flows through the San Francisco ISC is a testament to the global connectivity and the ever-increasing demand for international shipping. This facility plays a vital role in the smooth operation of the global postal system, connecting individuals and businesses across continents and facilitating the exchange of goods and information.

For more information about the San Francisco ISC and its operations, you can visit the official website of the United States Postal Service: www.usps.com.

The ‘Processed through ISC San Francisco’ Scan

If you have ever tracked a package through USPS, you may have come across the scan message “Processed through ISC San Francisco.” This scan is one of the many milestones in the journey of your package, and it holds important information about its progress and whereabouts.

Let’s decode what this scan means for your USPS package.

What the Scan Means

The scan message “Processed through ISC San Francisco” indicates that your package has arrived at the International Service Center (ISC) in San Francisco. ISC San Francisco is one of the largest and busiest mail processing facilities in the United States, handling a significant volume of international mail.

When your package reaches this facility, it undergoes customs clearance and inspection before it can continue its journey to its final destination.

This scan is an important checkpoint as it confirms that your package has successfully passed through the initial stages of international processing. It signifies that the package has been received and is being prepared for further transportation.

Next Steps in the Journey

Once your package has been processed through ISC San Francisco, it will be sorted and prepared for its next leg of the journey. Depending on its destination, it may be loaded onto an outbound flight or transferred to another postal facility for further processing.

The time this process takes can vary depending on factors such as customs clearance, volume of mail, and transportation logistics.

It is important to note that the scan message “Processed through ISC San Francisco” does not necessarily mean that your package will be delivered directly from San Francisco. It simply indicates that it has reached this particular facility in its journey and is progressing towards its final destination.

Time in Transit

The time it takes for a package to reach its destination after the “Processed through ISC San Francisco” scan can vary. Factors such as the package’s destination, shipping method, and any delays in customs clearance can all impact the overall transit time.

On average, international packages can take anywhere from a few days to a few weeks to reach their final destinations.

If you are eager to know the estimated delivery time for your package, it is advisable to check the tracking updates regularly. USPS provides detailed tracking information that can give you a better idea of when your package is expected to be delivered.

Interpreting Other Common USPS Tracking Updates

Arrival at Unit

When you see the tracking update “Arrival at Unit” on your USPS package, it means that your package has reached the local post office or delivery unit responsible for delivering it to your address. This update typically occurs after your package has gone through the sorting process at a regional or central facility.

It indicates that your package is now closer to its final destination and will soon be out for delivery.

In Transit to Next Facility

The tracking update “In Transit to Next Facility” means that your package is currently moving between different USPS facilities, such as a sorting facility or a distribution center. During this stage, your package is being transported to the next location where it will undergo further processing or sorting to reach its final destination.

This update indicates that your package is still on its way and hasn’t encountered any significant delays or issues.

Out for Delivery

The eagerly awaited tracking update “Out for Delivery” means that your package is now with the local postal carrier and is being delivered to your address. This is the final stage in the delivery process and indicates that your package will be arriving at your doorstep soon.

It’s an exciting moment when you see this update, as it means your long-awaited package is finally on its way to you!

Understanding these common USPS tracking updates can help you track the progress of your package and get a better idea of when it will arrive. If you want more detailed information about your package’s whereabouts, you can visit the official USPS website and enter your tracking number for real-time updates.

Remember, while tracking updates can provide valuable information, occasional delays may occur due to factors beyond USPS’s control.


Understanding USPS tracking can help ease worries about international packages. While ‘Processed through ISC San Francisco’ means your package has passed through a key facility, subsequent tracking updates will show its progress towards the final destination. With the information in this guide, USPS tracking updates will make more sense.

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