The 303 area code
The 303 area code covers Lakewood, CO, in the Mountain time zone. Here is which cities use it, the current local time, the codes it overlays, how 303 numbers are written, and how to get a local 303 number for your business.
303 covers Lakewood, CO. It sits in the Mountain time zone, where it is currently 9:30 PM. It shares that ground with 720 and 983, so ten-digit dialling is required. Numbers are written as (303) XXX-XXXX.
Where is the 303 area code?
The 303 area code serves Lakewood, CO. It is one of the active area codes in the North American Numbering Plan, the system that assigns phone numbers across the United States, Canada, and nearby regions. A caller seeing a 303 number knows, at a glance, that the line is tied to Lakewood, CO.
What cities use the 303 area code?
These are the places with numbering prefixes in 303, the ones with the most prefixes first:
Denver accounts for the largest share of 303 prefixes, with Aurora and Littleton next. A local number in any of them reads as local to everyone else on the list, because they all dial on 303.
Which area codes overlay 303?
303 is part of an overlay complex with 720 and 983. An overlay puts more than one area code over the same geography instead of splitting the region in two, so existing numbers keep their code and new ones get the added code. Two neighbours on the same street can hold different area codes. That is why ten-digit dialling is required here: you cannot assume a local call shares your area code.
What time is it in the 303 area code?
The 303 area code is in the Mountain time zone. Right now it is about 9:30 PM there. If you are calling a 303 number, check the local time first so you reach someone during business hours. If you run a business on a 303 line, missing a call after hours means the caller moves on to the next name on their list.
How to write a 303 phone number
A full 303 number is ten digits: the three-digit area code, then a three-digit prefix, then a four-digit line number. It is usually written as (303) XXX-XXXX, or 303-XXX-XXXX. To dial it from outside the United States, add the country code: +1 303 XXX XXXX.
Getting a local 303 number for your business
People are far more likely to answer a call from a local number. If you do business in Denver, Aurora and Littleton, a 303 number tells customers you are one of them, not an out-of-town call center. A virtual phone service can assign you a 303 number in minutes, no new hardware required.
The catch is answering it. A local number only helps if someone picks up. HiThisIs gives you a local number and a front desk that answers every call on the first ring, day or night, has a real conversation, and texts you the lead in seconds. It is a fraction of the cost of a human answering service, from $99 a month. See plans and pricing, or hear it answer on your own phone.
Common questions about the 303 area code
Where is the 303 area code?
The 303 area code covers Lakewood, CO, in the Mountain time zone.
What cities use the 303 area code?
Denver, Aurora, Littleton, Boulder, Golden, Longmont, Broomfield and Lakewood all have numbering prefixes in 303.
What time zone is the 303 area code in?
The 303 area code is in the Mountain time zone. The current local time there is 9:30 PM.
Does 303 overlay another area code?
Yes. 303 is part of an overlay complex with 720 and 983. An overlay puts more than one area code over the same geography, which is why ten-digit dialling is required there: two neighbours can hold different area codes on the same street.
Is 303 a real area code?
Yes. 303 is an active North American Numbering Plan area code serving Lakewood, CO.
How do I get a 303 phone number for my business?
A virtual phone service can assign you a local 303 number so customers in Denver, Aurora and Littleton see a familiar area code when you call, and so your business looks local. HiThisIs includes a local number with every plan and answers it around the clock.