Prefix 305-425 — Keys, FL

NANPA CO code assignment, current as of July 28, 2026.

Area code
305
Prefix (NXX)
425
Rate center
Keys
State
Florida
Time zone
Eastern
Code holder
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL
OCN
8664
Pooled
Yes (thousands-block pooling)
Assigned
2003-09-05
LATA
460

A phone number starting 305-425 was issued in the Keys rate center of FL — part of area code 305.

NANPA's central-office code records list MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL (OCN 8664) as the code holder, assigned September 5, 2003. Because 305-425 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

A scammer can display 305-425 without ever touching FL. When in doubt, end the call and reach the company or agency through its official website; unwanted robocalls belong in the FTC's fraud report queue.

Keys is part of the Miami-Fort Lauderdale-Pompano-West Palm Beach, FL Metropolitan Statistical Area. For routing purposes it sits in LATA 460. Numbers here keep Eastern time.

Neighboring prefixes

Prefixes adjacent to 305-425
PrefixRate centerCode holder
305-422 Keys MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL
305-423 Miami MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL
305-424 Miami BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL
305-426 Miami ABC PAGING CITY BEEPERS, INC.
305-427 Miami OMNIPOINT MIAMI E LICENSE, LLC
305-428 Miami TELEPORT COMMUNICATIONS AMERICA, LLC - FL

FAQ

Where is 305-425 located?

The prefix is assigned to the Keys 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 305-425 numbers?

MCIMETRO ACCESS TRANSMISSION SERVICES 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 305-425 safe to answer?

The prefix itself says nothing about the caller. Legitimate Keys businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.