Prefix 813-434 — Tampa South, FL

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

Area code
813
Prefix (NXX)
434
Rate center
Tampa South
State
Florida
Time zone
Eastern
Code holder
LEVEL 3 TELECOM OF FLORIDA, LP - FL
OCN
7635
Pooled
Yes (thousands-block pooling)
Assigned
2002-01-03
LATA
952

A phone number starting 813-434 was issued in the Tampa South rate center of FL — part of area code 813.

The assigned code holder is LEVEL 3 TELECOM OF FLORIDA, LP - FL, operating company number 7635, assigned January 3, 2002. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

A scammer can display 813-434 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.

Tampa South is part of the Tampa-St. Petersburg-Clearwater, FL Metropolitan Statistical Area. For routing purposes it sits in LATA 952. Numbers here keep Eastern time.

Neighboring prefixes

Prefixes adjacent to 813-434
PrefixRate centerCode holder
813-431 Tampa CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL
813-432 Tampa Central MCI WORLDCOM COMMUNICATIONS, INC. - FL
813-433 Tampa West LEVEL 3 TELECOM OF FLORIDA, LP - FL
813-435 Tampa North LEVEL 3 TELECOM OF FLORIDA, LP - FL
813-436 Tampa East LEVEL 3 TELECOM OF FLORIDA, LP - FL
813-437 Tampa Central LEVEL 3 COMMUNICATIONS, LLC - FL

FAQ

Where is 813-434 located?

The prefix is assigned to the Tampa South rate center in FL, area code 813. It is part of the Tampa-St. Petersburg-Clearwater, FL Metropolitan Statistical Area.

Which company owns 813-434 numbers?

LEVEL 3 TELECOM OF FLORIDA, LP - 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 813-434 safe to answer?

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