To run an RN lookup on clothing, find the five- or six-digit number after "RN" on the sewn-in tag, then search it in the FTC's Registered Identification Number database. The result gives you a company name and address, not a manufacture date. It tells you who registered the number, which helps you identify and loosely date a garment.
What an RN number is, and where to find it
RN stands for Registered Identification Number. The U.S. Federal Trade Commission issues them to businesses that make, import, distribute, or sell textile products. A company can put its RN on the label instead of printing its full name. You will see it as "RN 12345" or "RN#12345" on the content tag, usually near fiber content and care instructions.
Check the side seam tag first on tops and dresses. On pants and skirts, look inside the waistband. On outerwear, check the interior pocket or the lining seam. Many vintage pieces have the tag worn to a stub, so photograph it under raking light before you give up on reading it.
A few quirks matter before you search:
- RNs are for U.S. textile labeling. A garment with no RN is not suspicious by itself. Many pieces use a WPL number (wool products) or a CA number (Canadian) instead.
- Numbers are assigned to a company, not a product line. One RN can sit on thousands of styles.
- Numbers can be cancelled or reassigned. A company that closed may have its number reused later.
How to do an RN lookup on clothing: step by step
The process takes under two minutes once you have a legible tag.
- Locate the RN on the garment's content or care tag and photograph it, so you can zoom in on the digits.
- Read the digits carefully. Confirm a 3 is not an 8 and a 1 is not a 7. Worn tags cause most failed searches.
- Open the FTC's RN database search page and choose the search by RN number option.
- Enter the digits only, without the letters "RN" or any punctuation, and run the search.
- Record the company name, city, and state returned, along with whether the entry is active or cancelled.
- Cross-check the name against the tag's brand and any other labels. If they match, you have a confirmed maker or distributor. If they do not, the garment may be a private-label or licensed piece.
If the search returns nothing, the number may have been cancelled and purged, mis-read, or issued under a different company name. Try neighboring digits, then search the brand name directly.
What the result does and does not tell you
The database returns a legal entity. That is useful, but it is narrower than most sellers hope.
| The lookup can tell you | The lookup cannot tell you |
|---|---|
| Which company registered the number | The year the garment was made |
| Where the company was based | Where the garment was sewn |
| Whether the number is active or cancelled | Whether the piece is authentic |
| A lead for brand history research | The garment's condition |
Dating is where sellers go wrong. An RN number alone is not a date stamp. If a company registered in the 1960s and is still operating, its RN appears on garments from several decades. What you can do is bracket the date. A garment cannot predate the RN's registration, and a cancelled number suggests the company stopped using it. Pair that with the tag's typeface, fiber content wording, care symbols, and union label to narrow the era.
One firm rule: RN numbers began in 1952. Any tag with an RN is from that year or later. Tags with no RN, only a brand name and fiber content, often point earlier, though not always.
Using an RN lookup as an authenticity signal, with limits
An RN lookup is a quick sanity check for authenticity. If a tag claims a luxury brand but the RN resolves to an unrelated importer in another state, that is worth a closer look. Counterfeiters sometimes copy a real RN, though, so a matching result does not prove the item is genuine. Treat it as one signal, alongside hardware, stitching, and label construction. We cover that wider process in our guide to checking whether an item is authentic.
Also keep the failure mode in mind. Listing "1970s" because the RN company existed in 1970 is how a not-as-described claim begins. If a buyer later shows the fabric label uses a care symbol system that postdates your claimed era, you are arguing about your description instead of the garment.
Where the RN fits in a condition grade
The RN does not change a grade. It is provenance, not condition. GradeThread scores garments on five weighted factors: Fabric Condition, Structural Integrity, Cosmetic Appearance, Functional Elements, and Odor & Cleanliness. A 1985 piece with a clean RN trail can still land at Fair if the seams are slipping, and a vague-tag piece can reach Excellent.
Where the RN helps is context for the grade:
- Expectation setting. Knowing the maker and rough era tells you which wear is normal. Collar thinning on a 1970s polyester shirt is a different call than on a recent one.
- Cosmetic Appearance. A tag that is cut, faded, or unreadable is a cosmetic note. Disclose it. Buyers who collect by maker care about the tag.
- Tier ceiling. A piece that looks untouched but carries decades-old tags is rarely NWT or NWOT. Without original tags attached, the top tiers are off the table, so expect Excellent or Very Good at best.
Photograph the RN tag as one of your label shots. It supports your listing and answers a common buyer question before they ask.
Common RN lookup problems and fixes
Most failed lookups come from a short list of causes:
- Misread digits. Use a phone macro lens or zoom, and retry with ambiguous digits swapped.
- Number mistaken for a style code. Only digits directly after "RN" count. Style, lot, and size codes sit nearby and look similar.
- Company renamed or acquired. The result may show an older parent company. Search that name for the brand's history.
- Cancelled number. Treat it as a clue that the garment is older or from a defunct maker, not as proof of anything.
Record what you find in your listing notes, such as maker, location, and an era range, and describe it as a range. Stating "circa 1970s to 1980s" holds up better than a single year you cannot prove.
Try it on one garment
Pull one piece from your stock with a readable RN, run the lookup, and note what it confirms. Then grade the same garment in GradeThread to see how the five factors, and your provenance notes, combine into a 1.0 to 10.0 grade and a certificate buyers can verify.