Mason, OH — rate center
- State
- Ohio
- Active prefixes
- 22
- Carriers
- 9
- Pooled prefixes
- 16
- LATA
- 922
- Metro area
- Cincinnati, OH-KY-IN MSA
In NANP numbering, Mason, Ohio is a rate center — the anchor point for local numbers. It is reached through 283, 513 (multiple area codes serve it).
NANPA records show 22 active prefixes here, held by 9 different carriers. Pooling applies to 16 of them — individual thousands-blocks may belong to different companies.
The rate center belongs to the Cincinnati, OH-KY-IN Metropolitan Statistical Area. Routing-wise it sits in LATA 922.
Because 283, 513 all serve this territory, two Mason numbers can look completely different while being neighbors — check the prefix, not just the area code.
As always with US numbering: a prefix anchored to Mason tells you where the block was issued. The person calling may have ported the number, moved away, or be spoofing it entirely — verify callers through independently found contact details.
Prefixes anchored to Mason
| Prefix | Code holder | Pooled |
|---|---|---|
| 513-204 | CINCINNATI BELL EXTENDED TERRITORIES LLC - OH | Yes |
| 513-229 | CINCINNATI BELL EXTENDED TERRITORIES LLC - OH | Yes |
| 513-234 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | Yes |
| 513-336 | BRIGHTSPEED OF NORTHWEST OHIO, INC. | No |
| 513-339 | BRIGHTSPEED OF NORTHWEST OHIO, INC. | No |
| 513-398 | BRIGHTSPEED OF NORTHWEST OHIO, INC. | No |
| 513-445 | LEVEL 3 COMMUNICATIONS, LLC - OH | Yes |
| 513-459 | BRIGHTSPEED OF NORTHWEST OHIO, INC. | No |
| 513-466 | ONVOY, LLC - OH | Yes |
| 513-486 | CENTURYLINK COMMUNICATIONS, LLC | Yes |
| 513-492 | LEVEL 3 TELECOM OF OHIO, LLC - OH | Yes |
| 513-548 | BANDWIDTH.COM CLEC, LLC - OH | Yes |
| 513-573 | BRIGHTSPEED OF NORTHWEST OHIO, INC. | No |
| 513-622 | BRIGHTSPEED OF NORTHWEST OHIO, INC. | Yes |
| 513-637 | ONVOY, LLC - OH | Yes |
| 513-701 | LEVEL 3 TELECOM OF OHIO, LLC - OH | Yes |
| 513-754 | BRIGHTSPEED OF NORTHWEST OHIO, INC. | No |
| 513-770 | CINCINNATI BELL EXTENDED TERRITORIES LLC - OH | Yes |
| 513-848 | ONVOY, LLC - OH | Yes |
| 513-972 | LEVEL 3 COMMUNICATIONS, LLC - OH | Yes |
| 513-994 | ONVOY, LLC - OH | Yes |
FAQ
What area code is Mason, OH?
Mason is served by 2 area codes — 283, 513 — which overlay the same territory.
How many prefixes does Mason have?
22 active NXX prefixes are anchored to this rate center in NANPA records, held by 9 carriers.
Is a call from a Mason prefix really from Mason?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.