Florida · Eastern Time
Hialeah, FL Area Codes
Hialeah is served by 3 area codes (305, 645, 786). Here's which is original, which are overlays, and how to pick one for a new local number.
Last updated October 3, 2026 · Source: NANPA
Area codes serving Hialeah
Hialeah sits in Florida, part of the South region and the Eastern Time zone. Its numbers are spread across an overlay of 3 codes that all cover the same ground: 305, 645, 786.
The original code is 305 (in service since 1947). As the area ran low on numbers, regulators added overlay codes on top instead of splitting the city, so longtime residents kept their numbers while new lines received a newer code.
| Code | Area served | In service |
|---|---|---|
| 305 | Miami-Dade County and the Florida Keys | January 1, 1947 |
| 645 | Miami-Dade County and the Florida Keys | August 4, 2023 |
| 786 | Miami-Dade County and the Florida Keys | March 1, 1998 |
Nearby cities sharing these area codes
- Miami
- Miami Gardens
- Miami Beach
- Homestead
- Kendall
- Doral
- Coral Gables
- North Miami
- Cutler Bay
- Aventura
- Key West
- Key Largo
- Marathon
How to pick an area code for a new number
When you activate a new line in Hialeah, the carrier assigns whichever code has numbers available — you usually can't choose. If a specific code matters to you (for example the prestige of 305), ask the carrier whether any blocks remain, or request a number transfer. All codes here dial identically and cost the same.
Dialing in Hialeah
Because Hialeah is an overlay area, 10-digit dialing is mandatory: always dial the area code plus the seven-digit number, even for a neighbor. From outside the US, dial +1, then the area code and number. See 10-digit dialing and overlay area codes for the background. For every code in Florida, visit the Florida area codes page.
Quick answers
Hialeah area code FAQ
What area codes does Hialeah use?
Hialeah, FL is served by 3 area codes: 305, 645, 786.
Which is the original Hialeah area code?
305 is the original code for Hialeah, in service since 1947; the others were added later for more numbers.
What time zone is Hialeah in?
Hialeah is in the Eastern Time zone.
Do I need to dial the area code in Hialeah?
Yes. With multiple overlapping codes, 10-digit dialing is required for every call in this area.