Prefix 305-404 — Miami, FL
Numbers in the 305-404 prefix are registered to the Miami rate center in FL, inside area code 305. The prefix is the second block of a ten-digit US number (305-404-XXXX) and pins the number to a billing locality.
The assigned code holder is ONVOY, LLC - FL, operating company number 937C, assigned May 31, 2023. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.
The rate center lies in the Miami-Fort Lauderdale-Pompano-West Palm Beach, FL Metropolitan Statistical Area. The serving LATA is 460. Local time follows the Eastern zone.
Spoofing means this prefix on your screen doesn't guarantee a Miami caller. Verify independently before trusting a request for money or data.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 305-401 | Miami | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL |
| 305-402 | North Dade | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL |
| 305-403 | Miami | PAETEC ITEL, LLC |
| 305-405 | North Dade | PAETEC ITEL, LLC |
| 305-406 | Miami | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL |
| 305-407 | Keys | NEW CINGULAR WIRELESS PCS, LLC - GA |
FAQ
Where is 305-404 located?
The prefix is assigned to the Miami rate center in FL, area code 305. It is part of the Miami-Fort Lauderdale-Pompano-West Palm Beach, FL Metropolitan Statistical Area.
Which company owns 305-404 numbers?
ONVOY, LLC - FL holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.
Is a call from 305-404 safe to answer?
The prefix itself says nothing about the caller. Legitimate Miami businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.