Prefix 317-661 — Indianapolis, IN

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

Area code
317
Prefix (NXX)
661
Rate center
Indianapolis
State
Indiana
Time zone
Eastern
Code holder
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
OCN
2964
Pooled
Yes (thousands-block pooling)
Assigned
2012-10-01
LATA
336

Numbers in the 317-661 prefix are registered to the Indianapolis rate center in IN, inside area code 317. The prefix is the second block of a ten-digit US number (317-661-XXXX) and pins the number to a billing locality.

The assigned code holder is OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC, operating company number 2964, assigned October 1, 2012. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

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

Spoofing means this prefix on your screen doesn't guarantee a Indianapolis caller. Verify independently before trusting a request for money or data.

Neighboring prefixes

Prefixes adjacent to 317-661
PrefixRate centerCode holder
317-658 Indianapolis OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
317-659 Fairland BANDWIDTH.COM CLEC, LLC - IN
317-660 Carmel LEVEL 3 TELECOM OF INDIANA, LP - IN
317-662 Indianapolis OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
317-663 Carmel PAETEC ITEL, LLC
317-664 Indianapolis NEW CINGULAR WIRELESS PCS, LLC - IL

FAQ

Where is 317-661 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 317-661 numbers?

OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 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 317-661 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.