---
title: client.geo.longitude
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/variables/geolocation/client-geo-longitude
---

**Type:** FLOAT  
**Access:** read-only

**Available in:** all subroutines

Longitude, in units of degrees from the [IERS Reference Meridian](https://en.wikipedia.org/wiki/IERS_Reference_Meridian). Values range from -180 to +180 inclusive, with the 
exception of the special value 999.9 used to indicate absent data.

The longitude given is based on the [WGS 84](https://en.wikipedia.org/wiki/World_Geodetic_System)
coordinate reference system.