Amazon seller lookup: who is this seller, and do they sell your products?
- Built for
- Brands and brand managers who see an unfamiliar seller on their product, and the agencies that police listings for them.
- You enter
- A seller ID, a storefront link or an ASIN. Optionally up to 10 of your own ASINs to check against the seller.
- Price
- Free plan: 100 credits, no card. One analysis uses about 18 credits.
- What you get
- Per seller: display name, business name and business address as shown in Amazon's Detailed Seller Information, star rating, % positive (last 12 months), ratings in the last 30 days, 90 days, 12 months and lifetime, the share of lifetime ratings from the last 12 months, the recent feedback entries with date and stars, and the 1–2 star ones grouped by topic. With your ASINs: whether the seller offers each one today, with price, condition and ships from. A short summary of what to look at first.
- Coverage
- Amazon US (amazon.com) sellers. An ASIN lookup profiles up to 10 third-party sellers on the listing, lowest price first. Amazon shows no date a seller started, so the report shows how old or recent its ratings are instead. No sales, revenue, full product catalog or contact details beyond what Amazon publishes.
- Time to report
- Usually 1–2 minutes.
- Account
- Sign-in with Google required to run it. You can read the example and fill in the form without an account.
How do I look up an Amazon seller?
Take the seller ID from the "Sold by" link and read the seller's profile: business details, rating windows and recent feedback. In Nolyn's November 10, 2026 sample, seller A3AQUZVIJZ22D7 is Al's Sporting Goods, Inc. of Logan, UT: 4 stars, 70% positive in the last 12 months, 13,260 lifetime ratings, and 5 of its 15 latest feedback entries are 1-star.
For brands checking an unknown reseller on their listings. Paste a seller ID or storefront link, or an ASIN to look up every seller on that product. Nolyn reads the seller's Amazon profile and returns the business name and address exactly as Amazon publishes them, the star rating, percent positive in the last 12 months, rating counts for 30 days, 90 days, 12 months and lifetime, and the recent feedback buyers left, with the 1–2 star complaints sorted by topic. Add your own ASINs and it also checks which of them the seller offers today, at what price and condition.
- Positive, last 12 months
- 70%
- Lifetime ratings
- 13,260
- Latest feedback entries 1-star
- 5 of 15
- Your products it sells
- 1 of 2
Key findings
- A real, long-standing business, listed in Logan, Utah
- Its recent record is weaker than its lifetime
The report includes
- The business behind the name
- Ratings now versus lifetime
- What recent buyers said
- Which of your products they sell
What you get
The business behind the name
Ratings now versus lifetime
What recent buyers said
Which of your products they sell
Example: the Amazon seller Al's Sporting Goods, checked against two Lodge skillets
A real run on November 10, 2026. Al's Sporting Goods is one of 25 offers on the Lodge 10.25 in cast iron skillet (B00006JSUA), the product in our MAP monitoring example. Nolyn looked up its seller profile and read the offer lists of the 10.25 in and the 12 in (B00006JSUB) skillets to see which one it sells.
Positive, last 12 months
70%
4 stars lifetime
Lifetime ratings
13,260
282 in the last 12 months
Latest feedback entries 1-star
5 of 15
Aug 18 – Oct 22, 2026
Your products it sells
1 of 2
10.25 in at $34.99
| What we checked | Al's Sporting Goods (A3AQUZVIJZ22D7) |
|---|---|
| Business name | Al's Sporting Goods, Inc. |
| Business address, as Amazon shows it | 1075 N Main St, Suite 120, Logan, UT 84341, US |
| Star rating | 4 out of 5 |
| Positive, last 12 months | 70% |
| Ratings: 30 days · 90 days · 12 months · lifetime | 3 · 12 · 282 · 13,260 |
| Lifetime ratings from the last 12 months | 2.1% |
| Latest 15 feedback entries | 9 × 5-star, 1 × 4-star, 5 × 1-star |
| 1-star topics (Aug 18 – Oct 22, 2026) | Dirty item outside maker's packaging · wrong item · lost package · 2 refund complaints |
| Sells Lodge 10.25 in skillet (B00006JSUA)? | Yes: $34.99, New, ships from Al's · buy box Amazon.com $23.38 |
| Sells Lodge 12 in skillet (B00006JSUB)? | No: not among the 16 offers |
Seller profile and offer lists read November 10, 2026, 16:08 UTC, Amazon US. Business name and address as Amazon's Detailed Seller Information shows them. % positive is Amazon's last-12-months figure; the share of recent ratings is 282 ÷ 13,260.
A real, long-standing business, listed in Logan, Utah
Its recent record is weaker than its lifetime
5 of the 15 latest feedback entries are 1-star
It sells one of the two Lodge skillets
Every figure on this page was recomputed from the seller profile and the two offer lists the run saved (41 offers), and all matched the report. The run used 18 credits (3 data, 15 AI) and about a minute. The profile also returns a single rating_count field that is not a count (12,282 here, "12" joined to the 12-month 282); the brief tells the report to ignore it.
Checking every seller against your MAP?
This page identifies one seller. To see every seller on your products, who prices under your minimum advertised price and who is not on your authorized list, use MAP monitoring.
How it works
Find the seller
Paste a seller ID or storefront link. With an ASIN, Nolyn first reads every offer on the listing and takes up to 10 third-party sellers, lowest price first.
Read the profile
Nolyn reads each seller's Amazon profile: Detailed Seller Information, star rating, % positive, the four rating windows and the recent feedback.
Check your products
For each ASIN you add, Nolyn reads its offer list and matches the seller ID to see whether the seller offers it today.
Get the report
A summary of what to look at, a table per seller and the feedback list, as an HTML report you can forward or save as evidence.
Who uses an Amazon seller lookup
Brands finding unknown resellers
Brand protection teams
Agencies running Amazon for brands
What it cannot do
It covers Amazon US sellers only. It reports what Amazon's seller profile shows: when Amazon shows no business name or address, the report says so and does not look the business up elsewhere. Amazon shows no start date, so the report cannot say how long a seller has sold; it shows how much of its rating record is recent instead. It has no sales, revenue or full storefront catalog: product checks cover the ASINs you enter. The recent feedback is the entries Amazon's profile page shows, about 15, not every rating. Ratings and complaints are reasons to look closer, not proof that a seller is unauthorized or sells fakes. It does not contact sellers or file reports with Amazon.
Questions
Open the seller's profile from the "Sold by" link on a product page. Under Detailed Seller Information, Amazon shows the registered business name and business address for most sellers. Nolyn reads that profile for you and puts the business details, ratings and recent feedback in one report, exactly as Amazon shows them.
Click the seller's name next to "Sold by" or in the other sellers list. The link contains seller= followed by an ID that starts with A, such as A3AQUZVIJZ22D7 in the example. The same ID appears as me= in a storefront search link. You can paste either the link or the ID.
Yes. Paste the ASIN instead of a seller ID. Nolyn reads every offer on the Amazon US listing and looks up the profile of up to 10 third-party sellers, lowest price first. Amazon.com and Amazon Resale are Amazon itself and are not looked up.
Not directly: Amazon no longer shows a start date on seller profiles. The report shows rating counts for the last 30 days, 90 days, 12 months and lifetime instead. A seller with 13,260 lifetime ratings and 282 in the last year has an old record; one whose ratings are mostly from the last 12 months is new or growing.
Only your own reseller agreements can say that. Use this lookup to identify the business, then compare it with your authorized list. To check every seller on your listings against your list and your MAP at once, use MAP monitoring.
Yes. Seller Assistant's free Amazon Seller Lookup takes a seller ID or storefront link without an account and shows ratings, listing count, top brands and categories (checked November 11, 2026). Nolyn needs an account and credits; it adds the recent feedback grouped by complaint, the check against your own ASINs, and the every-seller lookup from one ASIN.
It is Amazon's share of the seller's ratings from the last 12 months that are 4 or 5 stars. It moves faster than the lifetime star rating: in the example, the seller shows 4 stars but 70% positive over the last year.
Yes. Reading this page is free; running a lookup needs a Nolyn account because it spends credits. New accounts get 100 one-time free credits, no card. The example used 18 credits.
Reading this page and the example is free. Running a lookup needs a Nolyn account: sign in and new accounts get 100 one-time free credits, no card. The example, one seller checked against two products, used 18 credits (3 for the data, 15 for the AI) and about a minute. An ASIN lookup costs 1 more credit for each seller profile it reads.
To run it, yes: sign in with Google. It is free and asks for no card. You can read the example and fill in the form before signing in.
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