Name availability · DE
Delaware business name search
Delaware's Division of Corporations has two free tools: the General Information Name Search for looking up existing entities, and a separate entity name availability check on its Name Reservation page. Use the name search to see who is already registered. Results mix active and inactive entities, so the list on its own doesn't tell you a company's current status.
How to check if a name is available in Delaware
- 01
Search existing entities
Open the General Information Name Search and type the entity name. The field isn't case sensitive; put your phrase in quotation marks for an exact search.
- 02
Remember results include inactive entities
Delaware returns both active and inactive entities and says the list doesn't indicate current status. Click a name to see its free details: file number, formation date and registered agent.
- 03
Run the official availability check
Go to "Check Entity Name Availability" on the Name Reservation page, choose your entity ending from the dropdown and enter the name without the ending. That tool shows real-time availability.
- 04
Check trade names separately
DBAs aren't in the Division of Corporations database. Search the Division of Revenue's trade name records to see whether someone already operates under your name.
- 05
Look for trademark and online conflicts
A Delaware filing says nothing about trademarks. Search https://tmsearch.uspto.gov/ and confirm your domain and handles.
- 06
Generate options if needed
If the name is taken, our free /business-name-generator/ can suggest alternatives to test in the availability tool.
Delaware business naming rules
- Names must be distinguishable on the Division's records from other reserved, registered or formed entities, unless the other entity files written consent.
- An LLC must include "Limited Liability Company", "L.L.C." or "LLC"; an LP must include "Limited Partnership" or "L.P."
- A corporation must include a word such as association, company, corporation, club, foundation, fund, incorporated, institute, society, union, syndicate or limited (or an abbreviation), unless it qualifies for the asset-based waiver.
- A corporation can't use "bank" or a variation unless it is a regulated bank or affiliate, or the word clearly doesn't refer to banking.
- The Division can reject a filing that doesn't comply with the Delaware Code even after a name has been reserved.
Reserving a name
Reserving a name is optional in Delaware. A reservation holds the name for 120 days, and you can file it online or submit a written application. Check the current fee on the agency's site.
DBAs and trade names
Effective February 2, 2026, Delaware trade name (DBA) registrations are filed with the Delaware Division of Revenue. They were previously filed with the Prothonotary of each county's Superior Court.
Still looking for the right name?
Brainstorm dozens of options with the free generator, then run your shortlist through the Delaware search above.
Frequently asked questions
How do I check if a business name is available in Delaware?
Use "Check Entity Name Availability" on the Division of Corporations' Name Reservation page. Select your entity ending and enter the name without it to get a real-time answer.
Why does the Delaware search show companies that are no longer active?
The General Information Name Search returns active and inactive entities together and doesn't show current status in the list. Open each record, or order a certificate of status, to confirm.
Do I need to reserve a name before forming a Delaware LLC?
No. Reservation is optional. It just holds the name for 120 days while you prepare your filing.
Where do I register a DBA in Delaware?
Since February 2, 2026, trade names are registered with the Delaware Division of Revenue instead of the county Prothonotary.
General information, not legal advice. Name approval is decided by the Delaware Department of State, Division of Corporations; a name showing as available in a search is not a guarantee it will be accepted.