Lot Number Lookup: How to Read Product Codes & Lot Numbers
When a recall is announced, you'll need to match specific codes on your products. Use this lot number lookup guide to find UPC, lot/batch, and date codes and compare them to the recall notice.
Why Product Codes Matter
Food recalls are typically limited to specific batches of products. Just because a product is recalled doesn't mean every package on the shelf is affected. Product codes help identify exactly which items need to be returned or discarded.
Pro tip: Keep your receipts! They can help you identify purchase dates and may be needed for refunds on recalled products.
Types of Product Codes
UPC (Universal Product Code)
The barcode found on almost every packaged product. It's a 12-digit number that identifies the manufacturer and product.
- First digit: Number system (usually 0 for standard products)
- Next 5 digits: Manufacturer code
- Next 5 digits: Product code
- Last digit: Check digit
Where to find: Usually on the back or bottom of the package, near the barcode.
Lot Number / Batch Code
A code that identifies when and where a product was manufactured. This is the most important code for recalls because it identifies the specific batch.
Example formats:
LOT: 24A15B
BATCH: 2024-156
L24356F1
Lot numbers can include:
- Date codes
- Factory identifiers
- Production line numbers
- Time stamps
Where to find: Often stamped or printed near the expiration date, on the bottom, side, or crimp of the package.
Best By / Use By / Sell By Dates
These dates help identify affected products and are often referenced in recalls.
Indicates when product is at peak quality. Often used for shelf-stable items.
Last date recommended for use while at peak quality. More critical for perishables.
Tells stores how long to display the product. You can usually use it shortly after this date.
BEST BY: MAR 15 2025
(Various formats: 03/15/25, 2025MAR15, 15MAR25)
Julian Date Code
A compact date format often used in manufacturing. The year is shown as 1-2 digits, followed by the day of the year (1-365).
June 5, 2024
Dec 30, 2024
Jan 1, 2025
How to read: "4156" = year 2024, day 156 = June 5, 2024
Establishment Number (EST.)
Found on meat and poultry products, this USDA-assigned number identifies the processing facility. It's often inside a circle or oval stamp.
USDA
EST. 12345
Where to find: On the label of meat, poultry, and egg products, usually near the "Inspected and Passed" mark.
Where to Find Codes on Your Product
Canned Goods
- On the bottom of the can
- On the top rim/lid
- Stamped on the side near the seam
Packaged Foods
- On the back panel near ingredients
- On the bottom of the package
- On the crimp or seal
Fresh Produce
- On the sticker (PLU code)
- On the bag or container
- On the clamshell packaging
Meat & Poultry
- On the main label
- Stamped on the packaging film
- On the sell-by sticker
Dairy Products
- On the cap or lid
- On the side of the container
- Near the nutrition facts
Frozen Foods
- On the side panel
- On the back near the barcode
- On the bottom flap
Medicines & OTC Drugs
- On the bottle label near the expiration date
- On the outer carton (lot / batch line)
- Stamped on the blister pack foil
How to Check if Your Product is Recalled
- 1
Find the recall notice
Search for the product on RecallPedia or check the FDA's official recall page. Look for the specific product name and brand.
- 2
Note the affected codes
The recall will list specific UPC codes, lot numbers, and/or date ranges for affected products.
- 3
Check your product
Locate the codes on your package and compare them to the recall notice. Pay attention to the exact format.
- 4
Take appropriate action
If your product matches, follow the recall instructions. Usually this means returning it for a refund or discarding it.
Common Code Formats by Manufacturer
Different companies use different code formats. Here are some common patterns:
| Format | Example | Meaning |
|---|---|---|
| Julian + Plant | 24156 A | 2024, day 156, plant A |
| Date + Time | 03/15/24 14:30 | March 15, 2024 at 2:30 PM |
| Alphanumeric | L4156F2B | Lot, year, day, factory, line |
| Best By Based | BB MAR 2025 | Best by March 2025 |
Tips for Keeping Track
- ✓ Take photos of product codes before discarding packaging.
- ✓ Save receipts to verify purchase dates and get refunds.
- ✓ Check regularly for recalls on products you buy frequently.
- ✓ Sign up for alerts from the FDA and manufacturers you buy from.
- ✓ Use a flashlight to read codes that are stamped or hard to see.
Lot Number Lookup FAQ
How do I look up a lot number for a recall?
Find the lot or batch code on the package (often near the expiration date), then open the recall notice and compare the listed codes character-for-character. You can search RecallPedia by brand or product name, or browse drug recalls and food recalls. If the codes do not match, your package is usually not affected.
Where is the lot number on medicine bottles?
Over-the-counter and prescription packages typically print a lot or batch line on the bottle label and again on the outer carton, next to the expiration date. Blister packs often stamp the lot on the foil. Use the same matching steps as for food: the recall notice lists the exact lot values that are included.
Is a UPC the same as a lot number?
No. The UPC identifies the product (brand + item). The lot or batch number identifies the production run. Recalls often list both: a UPC to confirm the product and lot codes to confirm which packages are included.
What if I cannot find a lot number?
Check the bottom, lid, crimp, and carton flaps with good light. If the packaging is gone and you cannot identify the lot, treat the item as potentially affected and follow the recall instructions, or contact the manufacturer with the brand, product name, and purchase date. See what to do with a recalled product.