Privacy policy: https://pubmatic.com/legal/privacy/
| Cookie | Category | Purpose |
|---|---|---|
ADUSERCOOKIE | Marketing | PubMatic UserId. this identifier to identify each user uniquely. Some of the uses of this anonymous identifier are to support frequency capping, perform UID sync ups with DSP's, DMP's. DMP's / DP's push audicne data against this ID. API publishers sends this ID while making API requests to PubMatic AdServer. UAS Ad Engine also uses this cookie for FCAP purposes. |
camfreq_ | Marketing | This cookie is set for each campaign and indicates the number of times (e.g., frequency) that a particular advertisement may have been shown on the applicable publisher site. |
chk | Functional | This cookie is set on Google Chrome browsers that have a version less 67 or non-Chrome browsers, and is used for testing purposes. |
chkChromeAb67 | Functional | This cookie is set on Google Chrome browsers that have a version above 67 and is used for testing purposes. |
chkChromeAb67Sec | Functional | This cookie is set on Google Chrome browsers that have a version above 67 and is used for testing purposes. |
chkSecSet | Functional | This cookie is set on Google Chrome browsers that have a version less 67 or non-Chrome browsers, and is used for testing purposes. |
COKENBLD | Functional | This cookie sets a flag to “true” if cookies are enabled on the user’s browser. |
_curtime | Functional | This cookie stores the current timestamp. |
DPFQ | Marketing | This cookie stores information regarding the number of times that a partner’s pixel is loaded by a user’s browser. This enables us to cap the number of times that a pixel is used to record a user’s visit to a website within a specific period of time. |
DPPIX_ON | Marketing | These cookies enable PubMatic to properly sync cookie IDs with our partners by ensuring that our partners do not override each other during the sync process. |
DPSync | Marketing | Keeps list of DMP pixel Id's PubMatic synced with so far PubMatic does userId sync up with DMP's. This cookie holds next sync up time for every pixel. Helps to maintain sync up frequency at DMP level. |
f5_cspm | Analytics | This cookie name is associated with the BIG-IP product suite from company F5. It is used to monitor page load speed, as part of site performance monitoring. |
FPtrust | Functional | This cookie is a session cookie used to support the opt-out process via the Network Advertising Initiative. |
ipc | Functional | This cookie is a short-lived cookie that stores information needed to coordinate cookie syncing. |
KADUSERCOOKIE | Marketing | PubMatic UserId. this identifier to identify each user uniquely. Some of the uses of this anonymous identifier are to support frequency capping, perform UID sync ups with DSP's, DMP's. DMP's / DP's push audicne data against this ID. API publishers sends this ID while making API requests to PubMatic AdServer. UAS Ad Engine also uses this cookie for FCAP purposes. |
KCCH | Marketing | To avoid race condition in PubMatic userId generation, showad.js / universalpixel.js set this cookie first. if and only if not set already. Existence of this cookie means that current flow of the execution should not generate PubMatic userId cookie, as its already being set by other flow which has set KCCH. |
KRTBCOOKIE_ | Marketing | Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads. |
KTPCACOOKIE | Functional | We use this cookie to check if third-party cookies are enabled on the user’s browser. |
pi | Marketing | This cookie enables us to determine which set of pixels needs to be executed on the browser. |
PMDTSHR | Functional | This cookie is set for Komli ad server and is used for default impression when other data is not available. |
PMFREQ_ON | Functional | This cookie ensures the proper functioning of the camfreq and pubfreq cookies, described above, in situations where one cookie may override the other. |
pp | Marketing | This cookie tracks the last publisher website that you visited that contained an advertisement served by PubMatic. |
pubfreq_ | Marketing | This cookie is set for each advertising network and indicates the number of times (e.g., frequency) that a particular advertisement may have been shown on the applicable publisher site. |
PUBMDCID | Marketing | Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads. |
PUBRETARGET | Marketing | Pixel expiry. Used to indicate if user must be considered for various re-targeting ad campaigns running in PubMatic system. |
pubsyncexp | Functional | Sets a unique ID for the visitor, that allows third party advertisers to target the visitor with relevant advertisement. This pairing service is provided by third party advertisement hubs, which facilitates real-time bidding for advertisers. |
pubtime_ | Functional | This cookie stores the period of time after which ad frequency counters reset. |
PUBUIDSYNCUPFQ | Functional | This cookie indicates the last time that we synced IDs with our partner. |
PugT | Marketing | It is used to track when the cookies were updated on the browser. It is used to limit the number of calls to server side cookie store |
SPugT | Marketing | This cookie is used to track when the server-side cookie store was last updated for the browser, and it is used in conjunction with the PugT cookie, described below. |
SyncRTB | Marketing | Keeps list of DSP pixel Id's PubMatic synced with so far. PubMatic does userId sync up with DSP's. This cookie holds next sync up time for every pixel. Helps to maintain sync up frequency at DSP level. |
SYNCUPPIX_ON | Marketing | These cookies enable PubMatic to properly sync cookie IDs with our partners by ensuring that our partners do not override each other during the sync process. |
USCC | Marketing | This cookie enables PubMatic to sync user IDs properly in situations where multiple advertisements might appear on the same webpage. |
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Last updated 2026-09-27.