303 Area Code
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Area Code 303 Location: Where is 303 Area Code Coming From?
The area code 303 serves the central northern regions of Colorado, including major cities such as Denver, Aurora, Westminster, Lakewood, Boulder, and surrounding areas.
It is an overlay for the 720 area code, covering multiple counties, including Denver, Jefferson, Adams, Arapahoe, Boulder, Sedgwick, Gilpin, Eagle, Broomfield, Clear Creek, Elbert, Douglas, El Paso, Park, and Weld.
These phone numbers also serve smaller cities such as Brighton, Deer Trail, Keenesburg, Englewood, Golden, Fort Lupton, Henderson, Idaho Springs, Hudson, Littleton, Lyons, Longmont, and Sedalia.
Below is the tabular illustration of the top 30 locations (based on the population) served or covered by area code 303 in Colorado.
City/Town | Country | TimeZone | |||||||
---|---|---|---|---|---|---|---|---|---|
Denver, CO | Adams | Mountain | |||||||
Aurora, CO | Adams | Mountain | |||||||
Lakewood, CO | Jefferson | Mountain | |||||||
Thornton, CO | Adams | Mountain | |||||||
Arvada, CO | Adams | Mountain | |||||||
Westminster, CO | Adams | Mountain | |||||||
Centennial, CO | Arapahoe | Mountain | |||||||
Boulder, CO | Boulder | Mountain | |||||||
Highlands Ranch, CO | Douglas | Mountain | |||||||
Longmont, CO | Boulder | Mountain | |||||||
Broomfield, CO | Broomfield | Mountain | |||||||
Castle Rock, CO | Douglas | Mountain | |||||||
Commerce City, CO | Adams | Mountain | |||||||
Parker, CO | Douglas | Mountain | |||||||
Littleton, CO | Arapahoe | Mountain | |||||||
Northglenn, CO | Admas | Mountain | |||||||
Brighton, CO | Admas | Mountain | |||||||
Ken Caryl, CO | Jefferson | Mountain | |||||||
Dakota Ridge, CO | Jefferson | Mountain | |||||||
Englewood, CO | Arapahoe | Mountain | |||||||
Wheat Ridge, CO | Jefferson | Mountain | |||||||
Lafayette, CO | Boulder | Mountain | |||||||
Columbine, CO | Arapahoe | Mountain | |||||||
Golden, CO | Jefferson | Mountain | |||||||
Louisville, CO | Boulder | Mountain | |||||||
Sherrelwood, CO | Adams | Mountain | |||||||
Erie, CO | Weld | Mountain | |||||||
Welby, CO | Adams | Mountain | |||||||
Greenwood Village, CO | Arapahoe | Mountain | |||||||
Superior, CO | Boulder | Mountain | |||||||
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How to quickly buy an area code 303 phone number?
To buy a 303 area code Denver phone number sign up with KrispCall, Select USA country and choose your 303 phone number, make payment & start making calls. You can start making and receiving calls online immediately after activating the number. For step-by-step directions, check the video alongside.

303 Area Code History – Where Does a 303 Area Code Originate?
In 1988, the 303 area code was first introduced and then subsequently split to create the 719 area code. In 1995, another split occurred, resulting in the 970 area code. Later in 1998, the 303 area code was overlaid with the 720 area code, making it an overlay.
This means that the same geographical area is now served by multiple area codes: 303 and 720. This allows more phone numbers to be assigned in the same geographic area.
Why Choose 303 Area Code Number for Business?
Establish a local presence in Denver and Boulder, and unleash the power of cutting-edge communication features with a 303 area code number. Deliver exceptional customer experience while capitalizing on local markets.

Access Powerful VoIP Features with your 303 Area Code Business Phone Number
Invest in 303 area code business phone numbers to streamline communication among your team members and customers. These numbers can benefit businesses of all sizes and offer a variety of features to enhance the customer experience.

Call Whisper
Use call whisper to train your employees on live calls and guide them in real-time, improving their performance and productivity.

Calls On Hold
Give yourself time to get external assistance or gather information by placing calls on hold, keeping your callers content.

Inteligent Call Routing
Instantly route customer calls to another line or agent who can better deal with their queries. Don’t keep your clients waiting.

Shared Number
Share a single number across multiple devices and teams to facilitate synchronized communication and improve customer response rates.

Call Forwarding
Instantly route business calls to your cellphones and landlines whenever necessary. Make sure you are not missing out on clients when not in the office.

Call Recording
Record client calls to monitor team performance and client requests, and to train employees, and improve customer service.

Call Filters
Narrow down the call logs with Krispcall call filters. Efficiently screen through your incoming, outgoing, and missed calls.

Voicemail
Allow callers to leave their queries or information as voicemail even when you aren’t available so that you can get back in touch with them later.

DND mode for Agents
Switch to Do Not Disturb mode to automatically shift incoming calls to voicemail, allowing you to focus on what needs to be done.

Call Analytics
Utilize insight-driven data to optimize your marketing campaigns, customer service, and team performance.

Contact Tags
Organize clients and teams by tagging contacts, making navigation easier on your dashboard.

Call History
View the history of all conversations, incoming and outgoing call logs, and all messages on one dashboard.

Caller ID
Set location-based caller IDs for outbound international calls. Localize your number to improve the chances of reaching potential customers in new markets.

Call Transfer
Make sure your clients aren’t kept waiting by allowing them to be transferred to another agent or line that can better address their needs.

Unified Callbox
Use an all-in-one dashboard to manage calls, SMS messages, voicemails, and more, allowing you to stay in touch with your team and customers instantly without switching apps.

Custom Greeting
Create a more personalized experience for your clients by recording personalized greetings and messages.
Areas of Application for Area Code 303 Phone Number
Practical ways businesses use 303 area code numbers
Area code 303 phone numbers can be used for a variety of applications, including

Business Communications
Businesses can use 303 area code phone numbers to establish a local presence in Denver, Boulder, and other areas of Colorado, and improve their call acceptance rate in the local market.

Customer Service
Companies can use 303 area code phone numbers to provide exceptional customer service by using features such as call transfer, call whisper, and call recording.

Marketing
Businesses can target specific regions and demographics by using 303 area code phone numbers to improve their marketing campaigns.

Personal Use
Individuals can use 303 area code phone numbers to establish a local presence in Colorado and make it easier for friends and family to reach them.

Virtual Office
Companies or entrepreneurs can use 303 area code phone numbers to set up a virtual office in Colorado, allowing them to conduct business and communicate with clients, regardless of their physical location.

Remote Teams
Companies with remote teams can use 303 area code phone numbers to keep all team members in sync by sharing a single number across multiple devices and teams.

Small Businesses
Small businesses can use 303 area code phone numbers to improve their productivity and custom.
How to get a 303 Area Code Phone Number Online?
Purchasing area code 303 Phone Numbers takes only a few minutes with KrispCall. In minutes, you can follow the steps to obtain an area code 303 number. All you need is a valid payment detail.

Port Your 303 Area Code Number to KrispCall Cloud Telephony
KrispCall makes it easy for you to port your existing 303 area code numbers to their service, ensuring a seamless transition for your business. During the process, you’ll have access to an additional number that will allow you to continue communicating without interruption. Your outbound calls will appear as your usual number, and all inbound calls will be redirected to the temporary number provided by KrispCall. This allows you to maintain your business communication without any disruption.
Nearby Area Codes
Area | Code |
---|---|
Denver, CO | 303/720 |
Grand Island, NE | 308 |
Albuquerque, NM | 505 |
Las Cruces, NM | 575 |
Lawton, OK | 580 |
Colorado Springs, CO | 719 |
Fort Collins, CO | 970 |
Frequently Asked Questions
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Area code 303 covers central northern regions of Colorado, including major cities such as Denver, Aurora, Westminster, Lakewood, Boulder, and surrounding areas.Â
It is an overlay for the 720 area code, covering multiple counties, including Denver, Jefferson, Adams, Arapahoe, Boulder, Sedgwick, Gilpin, Eagle, Broomfield, Clear Creek, Elbert, Douglas, El Paso, Park, and Weld.Â
These phone numbers also serve smaller cities such as Brighton, Deer Trail, Keenesburg, Englewood, Golden, Fort Lupton, Henderson, Idaho Springs, Hudson, Littleton, Lyons, Longmont, and Sedalia.
Country | USA |
State | Colorado |
Major Cities | Denver, Aurora, Westminster, Lakewood, Boulder, Brighton, Deer Trail, Keenesburg,
Englewood, Golden, Fort Lupton, Henderson, Idaho Springs, Hudson, Littleton, Lyons, Longmont, and Sedalia |
Time Zone | Mountain Standard Time (MT)Â |
Telephone Number Format | +1 (303) XXX-XXXX (+1 country code) |
The 303 area code normally serves central northern regions of Colorado, including major cities such as Denver, Aurora, Westminster, Lakewood, Boulder, and surrounding areas. .
A 303 area code is assigned to Denver, one of the most renowned cities in the US. It is located in the Colorado state of the U.S.A. Some of the most populous towns within the 303 area code are Aurora, Westminster, Lakewood, Boulder, and surrounding areas.
It also includes Brighton, Deer Trail, Keenesburg, Englewood, Golden, Fort Lupton, Henderson, Idaho Springs, Hudson, Littleton, Lyons, Longmont, and Sedalia.
No, the area code 303 does not belong to New Jersey. Area code 303 is in Denver, Jefferson, Adams, Arapahoe, Boulder, Sedgwick, and many more counties. Area codes for New Jersey include 201/551, 609/640, 732/848, 856/973, 908, and 973.
In 1988, the 303 area code was introduced and then split to create the 719 area code. In 1995, another split occurred, resulting in the 970 area code. Later in 1998, the 303 area code was overlaid with the 720 area code, making it an overlay.Â
This means that the same geographical area is now served by multiple area codes: 303, and 720. This allows more phone numbers to be assigned in the same geographic area.
303 belongs to the Mountain Time Zone (MST).
The features offered by a service provider affect the ability to send text messages. It is, however, possible to share multimedia messages, text messages, and phone calls with reliable phone number providers such as KrispCall 303 area code number.
303 area code telephone area codes are mostly legitimate. But with technology advancements, creating unique telephone numbers is easier than ever. Additionally, some free virtual phone number providers offer 303 scam codes.
Therefore, you should always purchase a legitimate number from a reputable provider like Krispcall.
Area code 303 is served by several large telephone companies, including AT&T, Verizon Wireless, T-Mobile, Sprint, Level 3 Communications, Bandwidth, Comcast, and Windstream.
Those with a 303 area code phone number can make outbound calls from their cell phones. However, the calls may be legitimate or scams. Therefore, you should check the caller’s online presence and do some background checks using their contact information.
There are different zip codes for different cities in the 303 Colorado area code. The area code of Arvada(Jefferson county) is 80001.