North American Numbers Source-cited · ownership disclosed
Area code
463
In service
United States · since 2016

Indianapolis (overlay)

An all-services overlay of area code 317, serving the same Indianapolis and central Indiana territory. It spells "IND" on the telephone keypad and entered service in 2016.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Indianapolis (overlay)
Type
geographic
Status
in service
In service since
2016
Projected exhaust
2058 Q2

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 463 is

Same territory as 317: Marion County plus surrounding central Indiana counties..

Communities served wholly or partly by 463:

IndianapolisCarmelFishersNoblesvilleGreenwood

Overlay shares all cities with 317.

B · Relationships

How it relates to other codes

The codes 463 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Overlay · 2016 317 Indianapolis 463 overlays the 317 geography; both codes serve the same area.
What's changing. Overlay of 317; ten-digit dialing mandatory.
C · History

How 463 got here

2016-03-15
Area code 463 entered service as an overlay of 317; it spells IND on the alphanumeric keypad.
Source: Wikipedia
2016-10-15
Mandatory ten-digit dialing began for the 317/463 overlay.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
202
Prefixes available
598
Thousands-blocks assigned
1,746

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 463 with another code →
Sources
Wikipedia ↗
Area code 463
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.