Prefix 317-641 — Indianapolis, IN

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

Area code
317
Prefix (NXX)
641
Rate center
Indianapolis
State
Indiana
Time zone
Eastern
Code holder
ONVOY, LLC - IN
OCN
097D
Pooled
Yes (thousands-block pooling)
Assigned
2008-01-11
LATA
336

317-641 identifies a block of numbers in Indianapolis, IN, within the 317 area code. Every US prefix is tied to exactly one rate center; this one is Indianapolis.

The rate center lies in the Indianapolis-Carmel-Greenwood, IN Metropolitan Statistical Area. The serving LATA is 336. Local time follows the Eastern zone.

Treat the on-screen number as a hint, not evidence — 317-641 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 - IN (OCN 097D) as the code holder, assigned January 11, 2008. Because 317-641 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

Neighboring prefixes

Prefixes adjacent to 317-641
PrefixRate centerCode holder
317-638 Indianapolis INDIANA BELL TEL CO INC
317-639 Indianapolis INDIANA BELL TEL CO INC
317-640 Indianapolis OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
317-642 Shelbyville PAETEC ITEL, LLC
317-643 Indianapolis BANDWIDTH.COM CLEC, LLC - IN
317-644 Indianapolis ONVOY, LLC - IN

FAQ

Where is 317-641 located?

The prefix is assigned to the Indianapolis rate center in IN, area code 317. It is part of the Indianapolis-Carmel-Greenwood, IN Metropolitan Statistical Area.

Which company owns 317-641 numbers?

ONVOY, LLC - IN 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 317-641 safe to answer?

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