Lenders don’t check all three credit bureaus the same way, and most don’t check all three at all. In SmartDispute’s data on 14,326 hard inquiries from 590 members, Experian showed up most often, Equifax least often, and many lenders stuck almost entirely to one bureau. Equifax also left out the requester’s address and phone number on more than half of its inquiries, which changes how you dispute them.
This article shares what the data shows, lender by lender, and what it means when you’re deciding which inquiries to question and where to send your letters.
Key Takeaways
- Experian accounted for 43% of hard inquiries, TransUnion 34%, and Equifax 23%.
- Most lenders have a strong bureau habit. Santander, Exeter, Credit Acceptance, and USAA checked Experian more than 90% of the time; Navy Federal and Regional Acceptance checked TransUnion; American Credit Acceptance checked Equifax.
- Capital One was the exception: it usually appeared on all three reports.
- 58% of Equifax inquiries listed no address or phone number for the company. Experian and TransUnion almost always did.
- The same lender can appear under dozens of names. We found 2,636 different requester names in the data.
- One in five members had three or more auto-lender inquiries on the same day, the mark of a dealership shopping one application.
About the Data
The data comes from the credit reports of 590 SmartDispute.ai members. Every member had reports from all three bureaus, so when an inquiry appears on one report and not another, it’s because the lender didn’t check that bureau, not because a report was missing.
We counted each inquiry once: one company, one bureau, one date, one member. Inquiries repeat on a member’s monthly reports, so we removed those repeats. The inquiries are dated January 2023 through September 2026. The data is de-identified: it contains no names, Social Security numbers, or account numbers.
One caution: these are people working to improve their credit, many of them shopping for auto loans. The patterns describe this group, not every consumer in the country, and any lender can change which bureau it uses at any time.
Which Credit Bureau Is Used Most?
| Credit bureau | Share of hard inquiries |
|---|---|
| Experian | 43% |
| TransUnion | 34% |
| Equifax | 23% |
The pattern held across lender types. Experian led for banks, finance companies, and auto lenders alike, at 45% to 46% of each group’s inquiries. Banks used Equifax least (13%), while auto lenders split their remaining inquiries evenly between TransUnion and Equifax (27% each).
The practical point: a hard inquiry usually lands on one or two of your reports, not all three. Of the 560 members with inquiries, 440 had them on all three reports, but that’s because most people apply with more than one lender. A single application usually leaves one mark.
Every Lender Has a Habit
Lenders choose which bureau to check, and most pick one and stick with it. This table shows the 20 lenders that appeared for the most members, with the share of each lender’s inquiries at each bureau.
| Lender | Members with an inquiry | Experian | TransUnion | Equifax |
|---|---|---|---|---|
| Capital One | 53% | 34% | 34% | 31% |
| JPMorgan Chase (JPMCB) | 40% | 64% | 33% | 3% |
| Synchrony (SYNCB) | 37% | 25% | 71% | 4% |
| The Bank of Missouri (TBOM, Milestone) | 34% | 23% | 70% | 7% |
| Citibank (CBNA) | 31% | 56% | 5% | 39% |
| Ally Financial | 29% | 57% | 12% | 32% |
| OneMain | 27% | 44% | 41% | 15% |
| Santander Consumer | 25% | 91% | 9% | 0% |
| Exeter Finance | 24% | 95% | 5% | 0% |
| Credit One Bank | 23% | 54% | 46% | 0% |
| Bank of America | 22% | 65% | 35% | 0% |
| Wells Fargo | 21% | 48% | 20% | 32% |
| 700Credit (dealer platform) | 20% | 100% | 0% | 0% |
| Global Lending Services | 20% | 55% | 0% | 45% |
| Westlake Financial | 18% | 62% | 0% | 38% |
| GM Financial | 15% | 2% | 35% | 62% |
| Navy Federal Credit Union | 15% | 5% | 91% | 3% |
| Discover | 13% | 86% | 7% | 7% |
| Regional Acceptance | 12% | 0% | 100% | 0% |
| Consumer Portfolio Services (CPS) | 12% | 37% | 49% | 14% |
A few patterns stand out:
- Capital One is the one major lender that routinely checks all three bureaus. Of the members with a Capital One inquiry, 82% saw it on all three reports.
- Chase is almost never on Equifax. Most members with a Chase inquiry saw it on only one report, usually Experian.
- Several auto lenders are almost single-bureau: Santander and Exeter on Experian, Regional Acceptance on TransUnion, and American Credit Acceptance on Equifax (96% of its inquiries).
- Some lenders skip a bureau entirely. In this data, Westlake and Global Lending Services never appeared on TransUnion, and Santander, Exeter, Credit One, and Bank of America never appeared on Equifax.
These habits help you read your own reports. If a lender you’ve never heard of shows up only on the bureau it normally uses, that fits a real application. If a lender appears on a bureau it rarely uses, it’s worth checking which application it came from.
The Missing-Address Problem at Equifax
Your first inquiry dispute letter goes to the company that checked your credit, at the address the credit bureau lists with the inquiry. That works when the bureau lists one. Equifax often doesn’t.
| Credit bureau | Inquiries with no address | Inquiries with no phone number |
|---|---|---|
| Equifax | 58% | 58% |
| Experian | 0% | 8% |
| TransUnion | 0% | 1% |
Half of all members (51%) had at least one Equifax inquiry with no contact information. The names most often affected were big, familiar lenders, including Capital One, Ally, Global Lending Services, Westlake, and American Credit Acceptance.
If an Equifax inquiry has no address:
- Check your Experian and TransUnion reports. If the same company checked another bureau, that report usually lists its address.
- If no report lists an address, start with Equifax instead: ask it to tell you who requested your report and how to reach them. Then write to the company.
Our free inquiry dispute letters cover both routes.
One Lender, Many Names
Credit reports show whatever name the lender reported, shortened to fit the bureau’s field. The result is a lot of names for the same company. We found 2,636 different requester names in the data.
- Capital One appeared under 25 names, including CAPITAL ONE, CAP ONE NA, CAPITAL ONE BANK USA, COAF (its auto business), CAP ONE VIA DEALER, and store-card names like KOHLS/CAPONE and CAP1/BASS.
- Synchrony appeared under 34 names. Most start with SYNCB followed by the store, such as SYNCB/AMAZON, SYNCB/LOWES, SYNCB/TJX, or SYNCB/PAYPAL.
- Citibank appeared under 34 names, including CITI CARDS CBNA, CBNA, and store cards like THD/CBNA (Home Depot), MACYS/CBNA, and CITIBANK NA., BEST BUY.
- 700Credit appeared under 167 names. It’s a credit platform that car dealers use, and each inquiry carries the dealership’s name after “700CREDIT.”
Some names belong to companies that pull reports for someone else, such as Xactus, Factual Data, and CoreLogic Credco, which check credit on behalf of mortgage lenders.
Before you dispute a name you don’t recognize, look at the first word or abbreviation and the store name after a slash. Many unfamiliar inquiries turn out to be a store card or a dealership you did apply with.
Dealership Shopping Shows Up as Clusters
When you finance a car at a dealership, the dealer often sends your application to several lenders at once. Each lender that checks your credit adds a hard inquiry, all on the same day.
In the data, 118 members, one in five, had three or more auto-lender inquiries on the same day, and some had as many as nine. More broadly, 36% of members had at least one day with five or more inquiries of any kind.
Scoring models account for this. FICO counts multiple auto loan inquiries within a 45-day window (14 days for older versions) as one, and VantageScore groups them within 14 days. So a cluster usually costs much less than it looks. How hard inquiries affect your credit score explains the details.
A cluster is legitimate if you applied for financing that day. If you only asked about a price, or a lender in the cluster isn’t one you’d expect, ask the dealership which lenders it sent your application to.
What This Means for Your Inquiry Disputes
- Check all three reports. An inquiry on one report usually isn’t on the others, so each report needs its own review.
- Match names before you dispute. Many unfamiliar names are abbreviations, store cards, dealer platforms, or companies acting for a mortgage lender.
- Use the address the bureau lists. When Equifax leaves it out, look for the same company on your other reports first.
- Treat dealer clusters together. If you applied that day, they’re likely valid. If you didn’t, dispute each one with the lender that checked your credit.
- Dispute only what you can’t explain. A lender with a permissible purpose, usually your application, is allowed to check your credit. Our guide to permissible purpose explains when an inquiry is worth challenging.
For the full process, see How to Remove Hard Inquiries From Your Credit Report.
Frequently Asked Questions
Which credit bureau is used most?
In SmartDispute’s data, Experian, with 43% of hard inquiries, followed by TransUnion (34%) and Equifax (23%). Individual lenders vary a lot, so the bureau that matters most is the one your lender uses.
Which credit bureau do car dealerships use?
It depends on the lenders the dealer sends your application to. Auto lenders in our data checked Experian on 46% of inquiries, and TransUnion and Equifax on 27% each. Individual lenders vary: Santander and Exeter almost always checked Experian, Regional Acceptance checked TransUnion, and GM Financial mostly checked Equifax. Because dealers often send one application to several lenders, expect inquiries on more than one report.
Do lenders check all three credit bureaus?
Most don’t. Most lenders in the data checked one bureau, sometimes two. Capital One was the main exception: 82% of members with a Capital One inquiry saw it on all three reports.
Why is an inquiry on one credit report but not the others?
Because the lender only checked that bureau. It’s normal, and it’s why you should review all three reports separately.
Why doesn’t my Equifax inquiry show an address?
Equifax left out the address and phone number on 58% of the inquiries in our data. Check your other reports for the same company, or ask Equifax who requested your report.
How do I find out who’s behind an unfamiliar inquiry name?
Look at the first word or abbreviation and any name after a slash, which is often a store or dealership. If you still can’t place it, the company’s address on your report, or a search for the name plus “credit inquiry,” usually identifies it.