Delaware Area Codes
Directory of all 1 telephone area codes assigned to Delaware.
Delaware phone numbers are served by 1 area code operating in the Eastern timezone.10-digit or 7-digit local dialing applies depending on the exact number. No area codes in Delaware are currently flagged as high-risk scams.
Most populated prefix: area code 302 (Delaware)
All Area Codes in Delaware
Major Cities Served by Delaware Area Codes
The most populous urban centers and census places covered by Delaware's area codes, ranked by population.
Delaware Area Code FAQs
Quick answers to common questions about Delaware telephone area codes.
How many area codes does Delaware have?
Delaware has 1 area codes: 302.
What timezone do Delaware area codes use?
Delaware area codes operate in the Eastern timezone.
What is the most populated area code in Delaware?
Area code 302 is the most populous prefix in Delaware based on covered city population.
Does Delaware use overlay area codes?
Delaware currently has no overlay code pairs listed in our directory.
Are there scam area codes in Delaware?
Delaware has no area codes currently flagged as high-risk scams.
About Delaware Area Codes & Phone Dialing Rules
When placing calls within Delaware, ten-digit dialing (area code + 7-digit telephone number) is required in overlay regions where multiple area codes serve the same geographic boundaries.