Miami's three overlapping area codes
All three of the area codes below cover the identical registered territory: Miami-Dade County plus the Florida Keys portion of Monroe County (mainland Monroe County, on the peninsula, uses a separate code, 239). Which of the three a given number carries comes down entirely to when the line was activated, not which part of that territory its owner lives in.
Miami's area codes and when each went into service
| Area code | Coverage | In service since | Still assignable? |
|---|---|---|---|
| 305 | Miami-Dade County and the Florida Keys (originally all of Florida) | 1947 (original) | Yes |
| 786 | Overlay on 305 | March 1, 1998 | Yes |
| 645 | Overlay on 305 and 786 | August 4, 2023 | Yes |
From all of Florida to three overlaid codes on one county
305 was one of the 86 original area codes the newly formed North American Numbering Plan assigned in 1947, and back then it covered the entire state of Florida, not just Miami. Growth pulled the state apart from 305 four separate times over the next 48 years. The west coast, from the Tampa Bay area south, split off as 813 in 1953. The area was served mostly by General Telephone (GTE) rather than AT&T at the time, so the split ran along a company boundary as well as a geographic one. North Florida, from the Panhandle down to Jacksonville, followed in 1965, moving to 904 with permissive dialing starting July 6 and mandatory dialing beginning January 1, 1966. The east coast from Palm Beach County north through Brevard County, plus the Orlando metro area, split off as 407 on April 16, 1988. The last geographic split came on September 11, 1995, when Broward County was carved out as 954, narrowing 305 down to roughly its footprint today: Miami-Dade County and the Florida Keys.
Regulators predicted the 954 split would delay 305's exhaustion but not prevent it, and they were right: growth from cell phones and pagers pushed the reconfigured 305 close to running out of numbers again within two years. Rather than split Miami-Dade a fifth time, Florida installed 786 as an overlay on March 1, 1998, the state's first overlay complex; it initially covered only Miami-Dade County before later extending across the rest of 305's territory, including the Keys. That same pattern held when a third code became necessary: the Florida Public Service Commission approved 645 in February 2022, and it went into service August 4, 2023, ahead of the combined exhaustion of 305 and 786's assignable prefixes, which regulators had projected would otherwise land sometime that same year. The shift from splitting a growing region to stacking overlays on top of it, once there's no more geography left to divide, is the same shift that shaped Atlanta's numbering plan once 404 ran out of room to split again; see how area codes actually work for the split-versus-overlay distinction itself.
'Mr. 305' and the market for old Miami numbers
Miami's attachment to 305 runs deeper than most cities' relationship with their own area code. Miami native Armando Christian Perez built his entire stage persona around it, going by Pitbull and "Mr. 305" since early in his career, and 305-branded tattoos are common enough locally that Miami-Dade natives have their own catchphrase for it: "305 'til I die."
That attachment created an actual resale market. Ed Mance, who runs PhoneNumberGuy.com buying up old business phone numbers in bulk and reselling them, told the Washington Post that 305 is one of his best sellers, trailing only Los Angeles's 310 and New York's 212, and he typically prices these secondhand numbers between $299 and $799. The irony, according to Miami New Times' reporting, is that 305 hasn't actually been a guarantee for new registrations in decades: register a new line in Miami-Dade today and you're more likely to end up with 786, or now 645, than the code the city built its identity around.
The AI voicemail scam FPL is warning Miami customers about
Florida Power & Light, the utility serving most of Miami-Dade, has been warning customers since May 2026 about a wave of AI-generated scam voicemails impersonating its billing department. One recorded message opens: "The state of Florida has recently changed its efficiency standards. Your house has been flagged for an energy compliance review." Another, using a fabricated employee name, says: "Hey it's Will from Florida Power and Light compliance department... you can get up to $3,000 dollars in energy rebates and possibly a new air conditioner at no cost" if the customer calls back immediately.
None of it is real, and it's a different threat from the caller-ID spoofing covered in is there really a 'scam area code'?: this scam doesn't fake a phone number at all, it fakes an entire voicemail from a fictional employee. FPL says the calls are engineered to extract personal information and payment once a customer dials the number left in the voicemail. The company's actual policy rules out everything the scam relies on: FPL states it will never ask a customer to pay outside its own authorized payment channels, and it will never show up at a home or business, or otherwise demand, payment through a prepaid card, cryptocurrency, or services like Zelle, Cash App, or Venmo to avoid disconnection. If an account is genuinely past due, FPL's own process is to leave a prerecorded message and send a letter asking the customer to call FPL, not the reverse. Anyone who gets one of these calls should hang up and dial the number printed on an actual FPL bill, not the one left in the voicemail.