# M-lab Activity Count
This data call returns a count 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-activity-count/data.json?resource=193.0.0.0/16&starttime=2020-08-21&endtime=2020-08-27
# 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 |
|---|---|
| nr_ips | Total number of hosts for which activity was observed. |
| 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. |