Houston

The original 1947 area code for Houston. Now the anchor of a five-code overlay (713/281/832/346/621) covering the greater metro.

The essentials Numbering data · NumberResearch · as of 2026-09-18

Place

Houston

Type

geographic

Status

in service

In service since

1947

Projected exhaust

2039 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 713 is

City of Houston core and the greater Houston metropolitan area, Texas.

Communities served wholly or partly by 713:

HoustonBellaireWest University PlacePasadenaHumble

Representative; as an overlay member, 713 numbers are dispersed across the entire 10-county Houston complex.

B · Relationships

How it relates to other codes

The codes 713 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?

Spawned · 1983 409 Beaumont 409 (Beaumont/Galveston) split off from 713 in 1983.

Spawned · 1996 281 Houston 281 split off from 713 for the suburbs in 1996, then became an overlay.

Overlay · 1999 832 Houston (overlay) 832 added as an overlay in 1999.

Overlay · 2014 346 Houston (overlay) 346 added as a fourth overlay in 2014.

Overlay · 2025 621 Houston (overlay) 621 added as a fifth overlay in 2025.

What's changing. Anchor of the 713/281/832/346/621 all-services overlay. Mandatory 10-digit dialing since 1999.

C · History