To do an RN number lookup, enter the digits from the garment's tag into the FTC's free Registered Identification Number database at ftc.gov. It returns the business name (and usually the address) of the company that registered the number, which is often the brand, manufacturer, or importer.
That answer is useful, but it comes with caveats. An RN identifies a registrant, not always the label on the front. Below is the step-by-step lookup, how to read the result, where it fails, and how to record it so you aren't redoing the search on the next item.
What an RN number is and why resellers search it
An RN (Registered Identification Number) is a number issued by the U.S. Federal Trade Commission to businesses that make, import, distribute, or sell textile, wool, or fur products. Companies can use it on the care or content tag in place of printing their full name. It usually appears as "RN 12345" near the fiber content and country of origin.
For a reseller, it matters in three situations:
- Missing or cut brand label. The main label was removed, faded off, or never existed, but the RN is still on the content tag.
- Unknown or private-label pieces. A thrifted sweater with a generic tag could be a department store house brand worth listing under a real name.
- Title and item specifics. eBay's Brand item specific is a search filter. A listing with Brand blank or "Unbranded" is filtered out of brand searches before buyers see it.
It is also a first-pass sanity check. If a tag claims a premium brand and the RN comes back to an unrelated company, that is a reason to look harder, not a verdict.
How to do an RN number lookup, step by step
The process takes under two minutes once you know where to look.
- Find the RN on the tag. Check the sewn-in content or care label, usually near fiber percentages. It reads "RN" followed by 5 or 6 digits. Some tags use "CA" numbers instead; those are Canadian and need a different lookup.
- Photograph the tag first. Take a clear, in-focus shot before you do anything else. You'll need it for the listing and as your record of the source.
- Open the FTC's RN database. Search the FTC's "Registered Identification Number" search page on ftc.gov.
- Enter the number only. Type the digits without the letters "RN." Search by RN, not by company name.
- Read the registrant record. Note the legal business name, address, and any listed product lines.
- Cross-check the name. Search the business name plus "brand" or "label" to see whether it matches the style, era, and tag design of your item.
- Record the result. Save the RN, registrant name, and your confidence level against the item's SKU.
[Screenshot placeholder: FlipDesk intake screen with RN field, registrant name, and confidence flag]
How to read the result (and where it misleads you)
The database returns who holds the number, which is not always who you expect. Here is how the common outcomes break down.
| Result | What it usually means | What to do |
|---|---|---|
| Registrant matches the brand on the front | Clean match | Use the brand in title and item specifics |
| Parent company or holding name | Brand owned by a larger group | Search the parent's brand list and match style and era |
| Manufacturer or importer name | Made for several labels | Treat as a clue only; check the label and construction |
| Retailer name | Likely a house brand | List under the retailer's private label if the label confirms it |
| No record or closed record | Number canceled, very old, or mistyped | Recheck digits; fall back to label, stitching, and style |
Limits worth knowing
- RNs can be transferred or reused. A number once tied to one company can later belong to another, so an old garment may point to the wrong brand.
- One company, many labels. A registrant with 20 brands doesn't tell you which one made your item.
- Not every garment has one. Many items use a full company name, a WPL number, or nothing at all.
- It doesn't prove authenticity. An RN match is one data point, not an authentication check. Counterfeits can copy tags.
The rule we use: an RN result is evidence, not proof. If you can't back it with a second signal (label design, construction, style number, era), list the item with the safest accurate wording instead of guessing a brand.
What to do when the lookup comes back empty
A blank result is common on older stock. Try these in order:
- Re-read the digits under magnification. 3 and 8, or 1 and 7, are easy to swap on a worn tag.
- Look for a style or SKU number on the same tag and search that string.
- Check the country of origin and fiber content for clues about the segment (workwear, department store, fast fashion).
- Compare the tag layout against dated examples of known brands. Fonts and tag shapes shift by decade.
- If it's still unknown, list it by garment type, material, and measurements, and put the brand as unbranded rather than guessing.
An honest "brand unknown" listing with good measurements beats a wrong brand claim. A wrong brand is a not-as-described return waiting to happen.
Why the lookup belongs in your intake workflow, not your head
Say you source 60 pieces in a Saturday run and 8 have missing or unfamiliar labels. At two minutes of lookup each, that is 16 minutes. If you don't record the results, you'll repeat some of that work whenever you see the same RN again, and the same RN shows up more often than you'd think because registrants tend to make many items.
Here is a simple example of the economics. Suppose an unbranded-looking jacket cost you $6. Identified correctly as a mid-tier brand, it lists at $48. Left as "unbranded," it might list at $22. On a $48 sale at roughly 13% final value fee, you'd pay about $6.24 in fees versus about $2.86 on the $22, but you'd keep roughly $41.76 versus $19.14 before shipping. The lookup took two minutes and moved the outcome by about $22. These are illustrative numbers, not a promise; your fees and prices will vary by category and store tier.
The fix is to log it once per item and once per RN:
- RN number as written on the tag
- Registrant name from the FTC record
- Brand you concluded, with a confidence flag (confirmed, probable, unknown)
- Second signal used (label, style number, construction)
- Tag photo linked to the SKU
After a few weeks, your own RN list becomes a lookup table, and repeat tags take seconds.
Connecting the RN to the rest of the listing
Brand ID is one input. The same tag photo that carries your RN also supports condition and trust. Buyers and eBay's INR and not-as-described claims both hinge on whether the listing matches what arrives.
Once the brand is set, grade the garment on the same standards every time. On GradeThread's scale that means the tiers NWT, NWOT, Excellent, Very Good, Good, Fair, and Poor, assessed across Fabric Condition, Structural Integrity, Cosmetic Appearance, Functional Elements, and Odor & Cleanliness. A confirmed brand with a vague condition description still invites disputes; a clear label shot plus a consistent grade reduces them.
A quick pre-list checklist for tag-based identification:
- Tag photo captured and linked to the SKU.
- RN looked up; registrant name recorded.
- Second signal confirms or rejects the brand.
- Brand item specific filled in, or left as unbranded if unconfirmed.
- Condition graded and defects photographed.
- Measurements entered before the listing goes live.
Try it on your next unlabeled piece
Pick one garment from your next batch with a missing or unfamiliar label, run the seven steps above, and see whether the result holds up against a second signal. If you want the RN, registrant, confidence flag, and tag photo stored against each SKU automatically, try logging that item in FlipDesk's intake queue and see how it carries through to your draft.