An RN lookup for clothing means searching the five- or six-digit RN number on a garment's tag in the FTC's Registered Identification Number database, which returns the company that registered it. It identifies a business, not always the brand, and it never tells you condition or value.
That distinction matters when you're standing in a thrift aisle with a tagless-looking blazer and a 30-second decision window. The RN is a lead. You still have to verify it, comp it, and grade the piece. Below is the exact workflow, what the result can and can't prove, and how to record it so you only do the lookup once per item.
What an RN number is (and isn't)
RN stands for Registered Identification Number. The FTC issues them to US businesses that make, import, distribute, or sell textile, wool, or fur products. A company can put its RN on the care or content label instead of printing its full name. That's why you find tags that read only "RN 12345" and a fiber content line.
Know the limits before you rely on it:
- It names a company, not always a brand. A distributor may hold the RN for several labels, or for private-label goods sold at a retailer.
- RNs can be reassigned or cancelled. A number on a 1990s tag may now point to a different company, or to nothing.
- Not every garment has one. Items made and sold outside the US, or with a full company name on the label, often carry none. Some use a WPL or CA number instead.
- It says nothing about authenticity or age. A matching RN is one data point, not proof.
How to do an RN lookup on clothing, step by step
This takes under two minutes per item once you've done it a few times.
- Find the RN on the tag. Check the sewn-in content and care labels, usually at the side seam or behind the neck label. It appears as "RN" followed by digits.
- Photograph the tag. Capture the RN, fiber content, and country of origin in one clear shot. You'll want it for the listing and for your records.
- Open the FTC RN database. Search the FTC's Registered Identification Number lookup by RN. [Screenshot placeholder: FTC RN search field with a sample number entered]
- Read the registrant record. Note the legal business name, address, and any listed business type.
- Search that company name plus the garment type. Look for the brands it sells. A search of the company name with "clothing brand" or "label" often surfaces the consumer-facing name.
- Cross-check against the garment. Compare the tag font, construction, fiber blend, and era to known examples of the brand. If anything conflicts, treat the match as unconfirmed.
When the lookup fails or returns a dead end
Plan for misses. Roughly speaking, expect a meaningful share of vintage and private-label tags to come back empty or ambiguous. That's normal, not a sign you did it wrong.
Here's what to try when the database gives you nothing useful:
- Search the RN number as plain text. Old listings, forums, and vintage label guides sometimes document RNs the database no longer shows.
- Check the company's other labels. If the registrant is a known manufacturer, the garment may be a private label or a retailer's house brand.
- Use secondary clues. Fiber content wording, union labels, button and zipper hardware, and stitching all narrow the era and maker.
- List with what you can prove. If you can't confirm a brand, describe the garment by type, fabric, and measurements rather than guessing a name. A wrong brand in the title invites an item-not-as-described case.
What to do with the result before you list
The RN gets you a name. Profit comes from what you do next.
First, comp it. Search sold listings for the identified brand and garment type, filtered to similar era and size. An unknown tag that resolves to a mid-tier label is a very different buy from one that resolves to a mass-market house brand.
Second, grade the garment honestly. Brand identity doesn't change condition. Score it against the five factors: Fabric Condition, Structural Integrity, Cosmetic Appearance, Functional Elements, and Odor & Cleanliness. Then place it in a tier: NWT, NWOT, Excellent, Very Good, Good, Fair, or Poor. A recognized brand in Fair condition still sells as Fair, and buyers will read your photos accordingly.
Third, fill the item specifics. On eBay, Brand is a core item specific, and a confirmed brand lets you complete it instead of leaving it blank or entering "Unbranded." Fuller specifics mean the listing appears in more filtered searches.
Log the RN so you never look it up twice
Resellers repeat this work constantly. You see the same RN in a different thrift store a month later and start from scratch. A small reference log fixes that.
| Field | Example entry | Why it matters |
|---|---|---|
| RN number | RN 00000 (example) | The lookup key |
| Registrant name | Example Apparel Co. | Source of truth from the FTC record |
| Brand(s) confirmed | Label A, Label B | What you put in the title and specifics |
| Confidence | Confirmed / Probable / Unknown | Stops a guess from becoming a listing claim |
| Era clue | Late 1990s, made in USA | Helps comping and keyword choice |
| Linked SKU | SKU-0412 | Ties the research to the item |
The confidence column is the one most people skip, and it's the one that protects you. "Probable" means you can use the brand in your research but should describe it cautiously in the listing.
Keep the tag photo attached to the same record as the SKU. If a buyer later questions the brand, you have your evidence in one place, which also shortens any return or dispute conversation.
Where this fits in your sourcing and listing flow
Do the quick tag read at the rack, and the full lookup at your staging table, not in the store. In-store, you only need to decide whether an unknown tag is worth a few dollars of risk. At home, run the database search, comp the result, and decide whether it goes to the listing queue or the donate pile.
A simple time budget helps. If an RN lookup plus comp takes five minutes and the item's likely sold price is $12, the research can eat your margin. Reserve the full workflow for pieces where the brand could move the price meaningfully, such as outerwear, wool, leather, and anything with a quality-construction feel.
Try it on one garment
Pick one tag in your current backlog with an RN and no brand name. Run the six steps above, record the result in your log, and note how long it took. If you want the lookup, tag photo, and grade stored against the same SKU, FlipDesk's catalog and grading steps keep them together, so the research follows the item all the way to the listing.