Area code 904

About area code 904

Area code 904 is a geographic area code in Florida, in service since July 11, 1965, according to the North American Numbering Plan Administrator (NANPA). It is an overlay: 904 and 324 cover the same territory, so neighbors on the same street can have different area codes. It is in the Eastern time zone. The places with the most assigned exchanges include Jacksonville, Fernandina Beach, Orange Park, Jacksonville Beach, and Starke. By population, its largest named places are Jacksonville, Jacksonville Beach, Fernandina Beach, Green Cove Springs, and Orange Park.

Where 904 numbers are local

904 holds 7.0% of the 11,187 central office codes assigned in Florida, the 5th most of the state's 23 codes. 11 Census places could be matched to rate centers with 904 exchanges; the most populous are Jacksonville (1.0 million), Jacksonville Beach (23,630), Fernandina Beach (13,672), and Green Cove Springs (10,087). Each place page lists the exact prefixes and carriers for that town.

How calls are dialed in 904

According to NANPA's dialing-plan data, local calls within 904 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Because local calls need the area code, business cards, signage and website copy should always show the full ten-digit number. NANPA's dialing-plan note for this code reads: "1+10 digit dialing permissible at service providers discretion"

Phone companies in area code 904

50 carriers hold the 785 central office codes assigned in 904. Bellsouth Telecomm INC d/b/a Southern Bell Tel & Tel has the most, with 215 (27%). 569 of the codes (72%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. The code holder is not necessarily the carrier serving a given number today, since numbers can be ported between providers.

Where 904 numbers are rated

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 904 has codes in 20 rate centers. Rate center names in the file are abbreviations; where one matches a Census place, the table links to that city's local-number page.

How full is area code 904?

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 785 are assigned in 904, 98% of 800. 150 were assigned in 2020 or later.

Using area code 904 for business calls

Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.

Porting a number you already use in area code 904 is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.