720 Area Code

720 area code serves as the central Colorado area code, encompassing Denver, Boulder, and the adjacent areas. It functions as an overlay for the existing area code 303. Colorado’s area codes include 303, 719, 720, and 970.

Time Zone:Mountain GMT -7:00 with Daylight Saving in the Summer
In Service Date:01-Jun-98
Area Code 720

Area codes are more than just a string of numbers dialed before a telephone number; they are vital to the structure and organization of modern telecommunications. Each area code uniquely identifies a specific geographical region, playing a crucial role in routing calls accurately and efficiently. Beyond their practical utility, area codes often become cultural identifiers, reflecting the regions they represent.

In the tapestry of North American area codes, the 720 code stands out. Introduced as an overlay for the 303 area code, it blankets a vibrant and diverse region. The 720 area code primarily serves the metropolitan area of Denver, Colorado, extending its reach to encompass surrounding cities and towns. Its introduction, back in 1998, was a response to the burgeoning demand for new telephone numbers, a testament to the area’s rapid growth and development.

From the bustling streets of Denver to the serene suburbs, the 720 area code maps a dynamic and evolving landscape, connecting communities and fostering communication across one of Colorado’s most populous regions.

What Area Code is 720?


In the city of Denver, area code 720 extends its coverage to various counties and cities situated in the central region of Colorado. Notable counties within this area include Denver, Arapahoe, Adams, Jefferson, and Boulder, among others.

Where is Area Code 720?

Denver, CO

Area code 720 encompasses an extensive area, including its prominent urban center, Denver, CO, with a population of 715,522 residents. This area code spans across 12 counties, touching regions such as Denver, Arapahoe, Jefferson, Adams, Boulder, Douglas, Broomfield, Weld, Elbert, and Clear Creek.

This map visually represents the extent of coverage for the 720 area code, with the covered areas clearly depicted in green.

720 Area Code
720 Area Code

The History of the 720 Area Code

The story of the 720 area code is a narrative of growth and adaptation in the face of ever-evolving communication needs. In the mid-1990s, the Denver metropolitan area, bustling with activity and expansion, was on the brink of exhausting its supply of phone numbers under the existing 303 area code.

The rise of cell phones, fax machines, and internet connections significantly contributed to this surge in demand. To address this impending shortfall, the telecommunications industry and regulatory bodies decided to introduce a new area code.

In 1998, the 720 area code made its debut, not as a replacement, but as an overlay to the existing 303 code. This strategic decision marked a significant shift in how area codes were distributed. Instead of splitting a region into different area codes, an overlay allows for multiple codes to coexist in the same geographic area.

The introduction of 720 meant that new phone numbers could be issued with this code, while existing numbers retained the 303 code. This approach minimized disruption for residents and businesses, as it eliminated the need for changing existing numbers.

Over the years, the 720 area code has seamlessly integrated into the fabric of the Denver metropolitan area. It stands as a symbol of the region’s growth and its ability to adapt to the changing landscape of communication technology.

The 720 area code, along with its older counterpart 303, continues to serve a diverse and dynamic population, playing a crucial role in connecting the vibrant communities of this part of Colorado.

Geographical Coverage

The 720 area code, a vital communications artery, sprawls across a significant portion of Colorado, encompassing a diverse array of cities and regions. At its heart lies Denver, the state’s bustling capital, known for its vibrant cultural scene and as a gateway to the Rocky Mountains.

This area code also blankets key cities such as Boulder, known for its picturesque landscapes and dynamic university presence, and Aurora, celebrated for its rich cultural diversity and expansive nature reserves.

Within these regions under the 720 umbrella, numerous notable landmarks and attractions stand out. Denver boasts the iconic Red Rocks Amphitheatre, an open-air music venue famed for its natural acoustics and stunning red sandstone formations.

The Denver Art Museum, known for its impressive collection of Native American art, also falls within this area code. In Boulder, the University of Colorado campus adds a youthful energy to the city, while the Flatirons provide a dramatic backdrop and a paradise for outdoor enthusiasts.

The relationship of the 720 area code with the 303 code is particularly unique. These area codes coexist in an overlay plan, meaning they cover the same geographic regions. This overlay reflects the growing demand for new phone numbers and serves to accommodate the area’s expanding communication needs without disrupting existing numbers.

This arrangement allows for a seamless blend of history and growth, as the two area codes work in tandem to keep the region connected. Whether it’s for personal communication, business dealings, or emergency services, the 720 and 303 area codes together form an essential part of daily life in this vibrant part of Colorado.

Demographic and Cultural Insights

The 720 area code, encompassing a significant portion of Colorado, is a melting pot of diverse demographics and rich cultural tapestries. This region is characterized by a varied population, with a significant representation of young professionals, families, and a growing number of immigrants, contributing to a multicultural landscape.

Denver, the core city within this area code, is notable for its youthful energy, driven by a median age lower than the national average. Additionally, cities like Boulder and Aurora within this area code boast a blend of students, tech professionals, and diverse ethnic communities, adding to the region’s dynamic demographic makeup.

Culturally, the 720 area code is a hub of historical and contemporary significance. Denver’s history as a gold rush town has transitioned into a modern-day center for arts, music, and culinary excellence.

The region is renowned for its vibrant arts scene, including the Denver Performing Arts Complex, one of the largest performing arts centers in the United States. The area’s rich cultural heritage is also evident in its numerous museums and galleries, celebrating everything from Western art to contemporary creations.

Famous personalities and businesses have flourished within the 720 area code, further elevating its status. Denver has been home to notable figures in various fields, from music to sports and entrepreneurship.

The city has also seen the rise of successful businesses, particularly in the tech and startup sectors, spurred by the area’s innovative spirit and supportive business environment. Additionally, Boulder, with its university-driven research and development, contributes significantly to the region’s reputation as a hub for innovation and intellectual prowess.

The 720 area code is not just a collection of numbers; it represents a region rich in history, bustling with current cultural activities, and home to individuals and enterprises that shape its unique identity. This area is a vivid illustration of how demographic diversity and cultural richness can coalesce to create a dynamic and thriving community.

The Role of 720 in Business and Technology

The 720 area code, a beacon in Colorado’s business and technology landscape, plays a pivotal role in shaping local enterprises and innovations. This area code has become synonymous with a thriving business environment, where startups and established companies coexist and flourish. For local businesses, having a 720 number is often seen as a badge of presence and credibility, signifying a direct connection to the region’s bustling economic and cultural heart.

Denver, within the 720 domain, has emerged as a hotspot for tech startups and entrepreneurial ventures. The city’s supportive ecosystem, characterized by a blend of access to funding, a skilled workforce, and a collaborative community, has fueled a surge in technology-driven businesses.

From software development to green tech, the startup scene here is diverse and vibrant. Boulder, another key city in the 720 area, is renowned for its innovative spirit, driven largely by the research and development stemming from the University of Colorado and a network of tech incubators and accelerators.

The significance of the 720 area code extends into the realms of marketing and branding. For businesses, leveraging this area code in their contact information and marketing materials is a strategic move. It immediately associates them with the area’s reputation for innovation, growth, and economic vitality. This association is particularly beneficial for businesses looking to establish a foothold in the competitive Denver market or to tap into the region’s tech-savvy consumer base.

Moreover, the area code serves as a unifying symbol in the local business community. It fosters a sense of belonging and shared identity among companies, regardless of their size or industry. This communal aspect is pivotal, as it encourages networking, collaboration, and a shared commitment to the region’s economic development and technological advancement.

In summary, the 720 area code is more than a telephonic identifier; it’s a symbol of business prestige, technological innovation, and regional pride. Its influence permeates through local business strategies, branding efforts, and the overarching narrative of growth and progress in Colorado’s tech and business sectors.

Current Trends and Future Outlook

The 720 area code, a vital component of Colorado’s communication infrastructure, is currently witnessing several intriguing trends and facing an evolving future. Presently, there is a noticeable increase in the demand for phone numbers within this area code, fueled by the region’s continuous population growth and the proliferation of personal and business mobile devices. This burgeoning demand reflects the area’s ongoing economic and demographic expansion, particularly in tech-centric cities like Denver and Boulder.

An emerging trend in local communication is the increasing reliance on mobile phones and internet-based communication platforms. This shift is gradually changing the traditional role of area codes. While area codes like 720 were once crucial for routing calls to specific geographic areas, advancements in technology have made physical location less relevant in determining phone numbers. Despite this, the 720 area code maintains its significance as a regional identifier, ingrained in the local identity and business branding.

Looking towards the future, the 720 area code faces potential challenges and changes. One possibility is the introduction of new overlays, similar to the 720 and 303 pairing, to accommodate the ever-growing demand for new numbers. This approach would ensure a steady supply of numbers without disrupting existing users.

Moreover, as communication technology continues to advance, we might see a further shift in how area codes are perceived and used. The rise of digital communication platforms could diminish the traditional importance of area codes in call routing. However, their role as a symbol of local identity and business presence is likely to remain strong.

The future of the 720 area code, therefore, appears to be one of adaptation and resilience. As it navigates the challenges of technological advancements and changing communication habits, it will likely continue to be an integral part of the region’s identity, serving as a bridge connecting its past to its future.


In this exploration of the 720 area code, we have traversed through its rich history, expansive geographical coverage, diverse demographic and cultural landscape, significant role in business and technology, and its current trends and future outlook. The journey reveals that the 720 area code is more than a mere collection of digits; it is a symbol of a vibrant and evolving region, deeply interwoven with the identity of Colorado’s heartland.

From its inception in 1998 as a practical solution to the burgeoning demand for phone numbers, the 720 area code has grown to become an integral part of the Denver metropolitan area and its surroundings. It spans across major cities and covers notable landmarks, showcasing the area’s dynamic blend of urban and natural beauty. The demographic and cultural fabric of the 720 area is rich and varied, marked by a fusion of youthful energy, entrepreneurial spirit, and diverse cultural influences.

In the realm of business and technology, the 720 area code stands as a testament to the region’s growth and innovation. It not only lends credibility and a sense of locality to businesses but also encapsulates the area’s thriving startup scene and technological advancements. The area code’s role in local marketing and branding strategies further emphasizes its importance beyond its telecommunication function.

Looking ahead, the 720 area code faces the future with potential changes and adaptations. The increasing shift towards mobile and internet-based communication may alter the traditional role of area codes, yet the 720’s symbolic value and regional significance remain steadfast. It continues to be a powerful emblem of local identity and a connector of communities.

In conclusion, the 720 area code is not just a functional tool in telecommunication; it is a living narrative of Colorado’s history, culture, and ambition. Its story reflects the region’s journey from a historical gold rush epicenter to a modern hub of innovation and diversity. As the area continues to grow and evolve, so too will the story of the 720 area code, echoing the spirit and resilience of the region it represents.

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Last Update: February 11, 2024