303 Area Code
Get a 303 Area Code Phone Number in Denver, Colorado Instantly
Unlock the power of localization for your business with multiple personal and business 303 area code phone numbers. Obtain vanity numbers, local numbers, and more, all from the convenience of your location.

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Area Code 303 Location: Where is 303 Area Code Coming From?
Area code 303 is located in Denver and Colorado, which was introduced as Colorado area code in 1947. It is the original area code for Mile High City along with other cities like Boulder, Golden, and front range mountains to the west regions like Idaho Springs.
It serves the central Colorado, including cities such as Denver, Aurora, Westminster, Lakewood, Boulder, and surrounding areas.
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 | County | 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 buy an area code 303 phone number?
To buy a 303 area code number, sign up with KrispCall; go to settings > My Number > Add New Number > Select USA > Advanced Filter > Enter 303 and match to the first part of the number > Click Search. Then choose your 303 number, make payment & start making & receiving calls and texts after the number activation.

303 Area Code History – Where Does a 303 Area Code Originate?
In 1947, 303 area code is an 86 original area code introduced by AT & T and the Bell system. In 1988, it 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, Colorado 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 phone area code numbers.
Businesses can incorporate 303 phone area code numbers to localize their business in Colorado and surrounding areas while streamlining communication for enhanced business productivity and unparalleled customer experience.

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.

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.

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

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.

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.

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 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.
Frequently Asked Questions
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Area code 303 is a telephone area code that serves the central Colorado region, including major cities such as Arvada, Denver, Aurora, Westminster, Lakewood, Boulder, and Centennial. It was created as 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
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 Timezone (MT)Â |
Telephone Number Format | +1 (303) XXX-XXXXÂ |
The 303 area code is located in central regions of Colorado, including major cities such as Denver, Aurora, Westminster, Lakewood, Boulder, and surrounding areas.Â
Most cities and communities of the 12 counties in central regions of the US state of Colorado have the 303 Area Code. Brighton, Deer Trail, Keenesburg, Englewood, Golden, Fort Lupton, Henderson, Idaho Springs, Hudson, Littleton, Lyons, Longmont, and Sedalia, are major cities under its service.
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.
The 303 area code comes from the split of 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.
The time zone of the 303 follows the Mountain Time Zone and Mountain Standard Time.
The 303 area code phone number support text messages depending on the the features offered by a service provider that 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.
Some of the popular 303 area code phone number carriers are AT&T, Verizon Wireless, T-Mobile, Sprint, Level 3 Communications, Bandwidth, Comcast, and Windstream.
Those who have 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.
The zip code of the 303 area code ranges from 80001 – 80643. There are different zip codes for different cities in the 303 Colorado area code. The area code of Arvada(Jefferson County) is 80001.