US Phone Lookup /
Delaware Reverse Phone Lookup
Identify unknown Delaware phone numbers.
Use ThisNumber's reverse phone lookup tool to find out who's calling you.
Federal Data
State Data
County Data
City Data
US Phone Lookup /
Identify unknown Delaware phone numbers.
Use ThisNumber's reverse phone lookup tool to find out who's calling you.
Federal Data
State Data
County Data
City Data
ThisNumber has over 28 million name and address records for about 23 million phone numbers, making it one of the best reverse phone lookup services for Delaware residents. Stop wondering who called you and start using this free lookup tool to identify the unknown callers, verify Delaware businesses, or research potential scam calls.
To identify the location of an Delaware phone number, you need to understand the North American Numbering Plan (NANP) structure that all Alabama numbers follow: +1 NPA NXX XXXX.
The area code (NPA) is your key to determining location. By matching the three-digit area code to Delaware's regional assignments, you can identify which part of the state the phone number originates from. Each area code corresponds to specific cities and counties throughout Delaware, making it possible to narrow down the caller's general location.
Here's a complete list of Delaware area codes with major cities:
| Area Codes | Cities |
|---|---|
| 302 | Wilmington, Dover, Newark |
For latest Delaware phone numbering regulations, contact Lisa Driggins at the Delaware PSC via [email protected] or 302-736-7550.
Delaware has approximately 1.5 million active phone numbers. Mobile phones account for the majority with 1.18 million users. Traditional landlines are declining, with 54,000 connections statewide. Internet phone services account for about 290,000 numbers.
The dominance of cell phones means that searching a Delaware phone number will likely return a mobile result. The decline of landlines suggests that tracing newer numbers might be more challenging compared to older landline numbers with more readily available public information.
Delaware Voice Subscriptions (in thousands):
| Service Type | June 2023 | Dec 2023 | June 2024 |
|---|---|---|---|
| Mobile telephony | 1,149 | 1,172 | 1,181 |
| Local exchange telephone service | 63 | 58 | 54 |
| VoIP subscriptions | 309 | 303 | 290 |
| Total | 1,521 | 1,533 | 1,525 |
Source: FCC Voice Telephone Services Report
Most phone numbers are cell phones, and most cell phone numbers come from the top three United States wireless companies. Here are the top five US Cell Phone Companies in Q1 2025:
Delaware residents experienced a decrease in unwanted calls in 2024, with complaints totaling 8,685. This is a drop from the peak of 19,311 complaints in 2021, according to the latest National Do Not Call Registry Data Book.
Key Facts for Delaware Residents:
According to the Federal Trade Commission's 2024 data, phone calls and text messages make up 35% of all fraud contact methods nationwide:
More than 1 in 3 fraud attempts happen through phone communication. Phone call fraud costs victims a median of $1,500 per case. Text message fraud costs a median of $1,000 per victim.
In 2024, Delaware residents reported 18870 fraud cases resulting in total losses of $34.3M, with a median loss of $466 per victim. With phone-based fraud representing such a significant portion of these cases, phone owner verification has become a critical consumer protection tool.
When you receive calls from unknown numbers, take a moment to research the caller's identity. Reverse phone lookup services allow you to search a phone number to find information about who's calling—including whether the number has been reported for fraudulent activity.
Received fraudulent calls or fallen victim to phone fraud? Report it immediately. Each report helps authorities identify fraud patterns and protect other consumers from similar scams.
Additional Contact:
Delaware Attorney General
Kathy Jennings
(302) 577-8400
Yes, reverse phone lookups are generally legal in Delaware, but the Delaware Personal Data Privacy Act (House Bill 154) provides significant protections for your personal phone data when collected by businesses.
The law applies to companies that process personal data of at least 35,000 Delaware residents or derive more than 20% of their revenue from selling personal data. Your phone number and related information qualify as "personal data" under the act when it can be linked to you as an identifiable individual.
The Delaware Personal Data Privacy Act protects "personal data," which includes any information linked to an identifiable individual. This covers:
The law also provides enhanced protection for "sensitive data," including information revealing your health conditions, sexual orientation, religious beliefs, or racial origin that might be inferred from phone usage patterns.
Under the Delaware Personal Data Privacy Act, you have five key rights regarding your personal phone data:
Request Process: Companies must provide a secure way for you to make requests, which you can find in their privacy notices. You don't need to create a new account to exercise these rights.
Response Timeline: Companies have 45 days to respond to your request, with a possible 45-day extension for complex requests. They must inform you of any extension within the initial 45-day period.
Free Service: Companies must provide information free of charge once per 12-month period. They can only charge reasonable fees for excessive or repetitive requests.
Appeal Process: If a company denies your request, you have the right to appeal. Companies must respond to appeals within 60 days and provide information on how to contact the Delaware Department of Justice if your appeal is denied.
The Delaware Department of Justice has exclusive enforcement authority over the Personal Data Privacy Act. The law does not allow private lawsuits - only the state attorney general can pursue violations.
Violation Process: Before taking legal action, the Department of Justice may issue a notice of violation giving companies at least 60 days to fix the problem. Companies that fail to comply after this cure period face enforcement proceedings.
Reporting Violations: If a company denies your appeal, they must provide you with information on how to contact the Department of Justice to file a complaint.
The Delaware Personal Data Privacy Act becomes effective January 1, 2025, giving you comprehensive rights to control how companies use your phone data for commercial purposes. For the most current information about your rights, visit the Delaware Department of Justice website.