Area code 813

Area code 813 at a glance

NANPA lists 813 as an in-service geographic area code for Florida, first put into service on January 1, 1953. It is an overlay: 813 and 656 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 Tampa, Plant City, and Zephyrhills.

Where 813 numbers are local

813 holds 7.0% of the 11,187 central office codes assigned in Florida, the 7th most of the state's 23 codes. 3 Census places could be matched to rate centers with 813 exchanges; the most populous are Tampa (415,000), Plant City (43,046), and Zephyrhills (22,304). For a storefront or service area inside 813, the place pages show which prefixes are rated local there.

How calls are dialed in 813

According to NANPA's dialing-plan data, local calls within 813 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Ten-digit local dialing means the area code is part of how customers save and recognize your number, so print it in full everywhere. NANPA's dialing-plan note for this code reads: "1+10 digit permissible at each service provider's discretion"

Phone companies in area code 813

45 carriers hold the 783 central office codes assigned in 813. Frontier Florida LLC d/b/a Frontier Comm of Florida has the most, with 233 (30%). 515 of the codes (66%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. Numbers can move between carriers through porting, so a code's holder tells you where the block started, not where every number lives now.

Where 813 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. 813 has codes in 8 rate centers. The table lists the rate centers with the most codes, with the matching Census place where the abbreviation could be matched.

813 code assignments over time

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). 783 are assigned in 813, 98% of 800. 64 were assigned in 2020 or later.

Using area code 813 for business calls

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

If you already have a number in area code 813, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.