Prefix 513-540 — Middletown, OH
- Area code
- 513
- Prefix (NXX)
- 540
- Rate center
- Middletown
- State
- Ohio
- Time zone
- Eastern
- Code holder
- ONVOY, LLC - OH
- OCN
- 464C
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2020-02-25
- LATA
- 328
513-540 identifies a block of numbers in Middletown, OH, within the 513 area code. Every US prefix is tied to exactly one rate center; this one is Middletown.
The rate center lies in the Cincinnati, OH-KY-IN Metropolitan Statistical Area. The serving LATA is 328. Local time follows the Eastern zone.
Treat the on-screen number as a hint, not evidence — 513-540 can be spoofed like any US prefix. If a call feels off, verify through an official callback number and file a complaint with the FCC or FTC.
NANPA's central-office code records list ONVOY, LLC - OH (OCN 464C) as the code holder, assigned February 25, 2020. Because 513-540 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 513-537 | Cincinnati | WADDELL SOLUTIONS GROUP LLC |
| 513-538 | Cincinnati | VONAGE AMERICA LLC |
| 513-539 | Monroe | OHIO BELL TEL CO |
| 513-541 | Cincinnati | CINCINNATI BELL |
| 513-542 | Cincinnati | CINCINNATI BELL |
| 513-543 | Cincinnati | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH |
FAQ
Where is 513-540 located?
The prefix is assigned to the Middletown rate center in OH, area code 513. It is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area.
Which company owns 513-540 numbers?
ONVOY, 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 513-540 safe to answer?
The prefix itself says nothing about the caller. Legitimate Middletown businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.