Prefix 513-370 — Cincinnati, OH

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

Area code
513
Prefix (NXX)
370
Rate center
Cincinnati
State
Ohio
Time zone
Eastern
Code holder
LEVEL 3 COMMUNICATIONS, LLC - OH
OCN
4863
Pooled
Yes (thousands-block pooling)
Assigned
2011-06-02
LATA
922

The 513-370 prefix belongs to area code 513 and is anchored to the Cincinnati rate center (OH). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

Cincinnati is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area. For routing purposes it sits in LATA 922. Numbers here keep Eastern time.

The assigned code holder is LEVEL 3 COMMUNICATIONS, LLC - OH, operating company number 4863, assigned June 2, 2011. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

Caller ID showing 513-370 is not proof the call came from Cincinnati: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.

Neighboring prefixes

Prefixes adjacent to 513-370
PrefixRate centerCode holder
513-367 Harrison CINCINNATI BELL
513-368 Cincinnati CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH
513-369 Cincinnati CINCINNATI BELL
513-371 Cincinnati ONVOY, LLC - OH
513-372 Cincinnati CINCINNATI BELL
513-373 Cincinnati LEVEL 3 COMMUNICATIONS, LLC - OH

FAQ

Where is 513-370 located?

The prefix is assigned to the Cincinnati rate center in OH, area code 513. It is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area.

Which company owns 513-370 numbers?

LEVEL 3 COMMUNICATIONS, LLC - OH 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 513-370 safe to answer?

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