# M-lab Clients
This data call returns a set of all the hosts within a certain resource for which any network tests occurred. The maximum time window for this datacall is 7 days.
The data is based on active host measurements collected by the Measurement Lab platform (M-Lab (opens new window)).
The measurements are commonly ran using the M-Lab Network Detection Tool (NDT (opens new window)). Note there is typically at least a 24-hour delay between data collection and data publication
The results published, including host details are covered by the M-Lab acceptable use policy (opens new window).
GET /data/mlab-clients/data.json?resource=193.0.0.0/16&starttime=2020-08-21T07:00&endtime=2020-18-27T12:00
# Parameters
| Key | Value | Info | Required | Default value |
|---|---|---|---|---|
| resource | IPv4 Prefix, IPv4 address, IPv6 prefix, IPv6 address, IP range or country code | Defines the resource that the query is performed for. | YES | |
| starttime | ISO8601 or Unix timestamp | Defines the starttime for the query. | NO | endtime - 7d |
| endtime | ISO8601 or Unix timestamp | Defines the endtime for the query. | NO | today |
# Data Output
| Key | Info | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| clients | A key-value list of hosts with network activity, indexed by the host IP address. Each record has the following format.
| ||||||||||||
| nr_clients | Total number of hosts in the result. | ||||||||||||
| perc_coverage | (Only applicable for prefixes). The amount of address space coverage of the hosts. Equals to nr_clients/number of IPs in the prefix. | ||||||||||||
| query_starttime | Defines the start of the time interval covered in the query. | ||||||||||||
| query_endtime | Defines the end of the time interval covered in the query. | ||||||||||||
| resource | Defines the resource used in the query. |