Zionsville, IN — rate center
- State
- Indiana
- Active prefixes
- 11
- Carriers
- 6
- Pooled prefixes
- 10
- LATA
- 336
- Metro area
- Indianapolis-Carmel-Greenwood, IN MSA
The Zionsville rate center (Indiana) anchors 11 active prefixes under area codes 317, 463. Rate centers, not city limits, are what phone numbers are legally tied to.
The rate center currently carries 11 working prefixes across 6 carriers. 10 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.
The rate center belongs to the Indianapolis-Carmel-Greenwood, IN Metropolitan Statistical Area. Routing-wise it sits in LATA 336.
Multiple area codes over one rate center (317/463) is the overlay pattern: same geography, different first three digits.
A Zionsville prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.
Prefixes anchored to Zionsville
| Prefix | Code holder | Pooled |
|---|---|---|
| 317-342 | ONVOY, LLC - IN | Yes |
| 317-344 | LEVEL 3 TELECOM OF INDIANA, LP - IN | Yes |
| 317-732 | TELEPORT COMMUNICATIONS AMERICA, LLC - IN | Yes |
| 317-733 | INDIANA BELL TEL CO INC | Yes |
| 317-873 | INDIANA BELL TEL CO INC | No |
| 317-942 | LEVEL 3 COMMUNICATIONS, LLC - IN | Yes |
| 317-973 | LEVEL 3 COMMUNICATIONS, LLC - IN | Yes |
FAQ
What area code is Zionsville, IN?
Zionsville is served by 2 area codes — 317, 463 — which overlay the same territory.
How many prefixes does Zionsville have?
11 active NXX prefixes are anchored to this rate center in NANPA records, held by 6 carriers.
Is a call from a Zionsville prefix really from Zionsville?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.