AM_REDIRECT_​BACK_SERVER_URL Provides a redirection URL during sign in & registration events.

AMAuthCookie Temporary cookie used to manage sign in.

amlbcookie Server side management of sign in.

announcement In BBC Sounds, a cookie that ensures you only see announcements in the Radioplayer web console once per session.

atidvisitor / atuserid / idrxvr The BBC’s analytics system uses cookies to gather information regarding visitor activity on the BBC's websites and other BBC online services. The data gathered is sent to AT Internet, the BBC's analytics partner, for analysis and reporting. The BBC uses this information to help improve the services it provides to its users.

AWSALB Manages web traffic and balances traffic load.

BBCCOMMENTS​MODULESESSID Reports back error messages in posting comments.

_cb_ls / _cb_svref / _chartbeat2 / _chartbeat5 / _chartbeat4 /_cb / _cb_cp Chartbeat is used to understand engagement with pages by tracking how far a user gets on a page and where they're clicking.

ckns_acad-​gateway Academy page language setting.

ckns_bbcTvVod Manages the Banner asking users to confirm that they have a TV Licence to be able to watch BBC programmes in iPlayer. The Cookie is set to display TV Licence advisory notice every every 3 months.

ckns_echo_​device_id Used to synchronise the analytics device ID between the native and web layers of iOS/Android apps, e.g. BBC Sport

ckns_eds Suppresses surveys already seen.

ckns_explicit Stores whether or not a browser has explicitly actioned the cookie banner.

ckns_id-session​-redirects Counts redirects in the sign in flows so that the BBC can degrade gracefully during instances of infinite redirects.

ckns_idtkn / ckns_atkn / ckns_id Indicates that a user is signed in.

ckns_IVOTE_​HISTORY Stores voting history per user.

ckns_jwt Indicates the state of the sign in session.

ckns_mvt Identifies visitors included in website optimisation tests to understand if the website is operationally efficient and delivering the right customer experience.

ckns_nav​_promofail Counts how often the footer "promo" cards fail to load, so we can tell browsers to stop further attempts to loads.

ckns_nonce Helps to keep BBC accounts secure while signed in.

ckns_orb_fig_​cache Stores if the browser visiting the page is in the UK, EU & the device type they use when they visit (Mobile, Tablet or Desktop). Used by BBC products to load specific services such as cookie compliance messaging and to optimise the page loading to reduce data usage and page loading times.

ckns_orb_nofig Remembers any failures on pages using our older, deprecated global navigation (ORB).

ckns_orb_​nopromo Counts how often the footer "promo" cards fail to load, so we can tell browsers to stop further attempts to loads.

ckns_pgAge​Confirm Stores parental guidance confirmation that you're over 16.

ckns_pgPIN Stores Parental Guidance PIN number.

ckns_pg​Unlocked Stores Parental Guidance Lock state.

ckns_policy Stores current user's cookies settings.

ckns_policy​_exp Cookie storing date and time the user saw the BBC cookie banner, allows us in the future to redisplay cookie banner for compliance reasons, with new wording or updates to browsers who only viewed the banner before the new wording date.

ckns_privacy Stores whether or not a browser has been displayed the privacy policy banner.

ckns_rtkn Refresh token (refresh expired access and identity tokens).

ckns_sa_labels​_persist Persists statistics tracking when users move between different BBC websites.

ckns_session Indicates that a user has signed in recently. Provides additional security for accessing sensitive information in the BBC account settings.

ckns_settings-​nonce Stores a unique identifier for the signed in session.

ckns_sscid Analytics device ID for BBC Affiliates (World Service, GNL).

ckns_stateless Controls user journey based on web session type, i.e. stateless or stateful.

ckns_sylphid This cookie value can be disabled by turning off personalisation, it stores the hashed user ID to track signed in activity.

ckns_taster_csrf​_token Ensures that feedback about pilots on Taster is only submitted from legitimate BBC websites.

ckns_taster​_dsc Remembers how many times Taster disclaimer banner has previously been shown and if the user has explicitly dismissed it.

ckns_taster_​rate_id Stores audience members ratings to pilots on Taster, and answers to feedback questions.

ckns_telescope Stores voting history per user.

ckns_usip Manages sign-in prompting logic in News and Sport.

ckps_bbcLive​SignIn​Dismissable​Count Stores the number of times a user has dismissed the mandatory sign in banner.

ckps_bbcLive​SignIn​Dismissable​CountMet Displays mandatory sign in banner.

ckps_bbcTv Determines if a user has accepted the tv license banner and if they have, we don’t display the banner again.

ckps_id_ptrt Provides a redirection URL at the end of sign in & registration events.

ckps_tap_​implicit Stores content consumption information for non-signed in users, and information on promotional banners seen for BBC services on TVs.

ckps_tap_users Stores credentials information for signed in users on BBC services on TVs.

ecos.dt Stores information about Online Quality Survey.

guid In BBC Sounds, a cookie in the Radioplayer web console that sets an identifier for each unique browser to allow aggregated analysis.

i00 Kantar for BARB Shares anonymous data about use of online and mobile media players with the Broadcasters' Audience Research Board (BARB), to understand how many people watch online, and how much they watch.

identitytoken Indicates that a user is signed in.

identitytoken (Transversal) Remembers the visitor between sessions. Mainly for logging statistics. If not present, could not track repeat visits.

interstitial In BBC Sounds, a cookie in the Radioplayer web console to ensure you only see any radio station-provided advertising once per session.

lastplayed In BBC Sounds, a cookie in the Radioplayer web console to remember the last station you listened to.

listening​history In BBC Sounds, a cookie in the Radioplayer web console to remember the stations you've listened to, for your Recents list.

metafaq​Session​ID Maintains a visitor's session. Mainly for logging statistics. If not present, could not track a user journey.

nightfall​RefreshToken Stores a game token for the Nightfall game, so a user's progress can be attributed to them.

nightfall​SessionToken Stores a game token that allows Nightfall game session tokens to be renewed. Needed to authenticate a user so their game progress can be attributed to them.

optimizelyEnd​​UserId Identifies visitors included in website optimisation tests to help improve the customer experience.

_pk_cvar Used by the Matamo (formerly Piwik) 3rd party statistics tool. Provides enhanced metrics on top of Transversal's native statistics tracking.

_pk_id Used by the Matamo (formerly Piwik) 3rd party statistics tool. Provides enhanced metrics on top of Transversal's native statistics tracking.

_pk_ref Used by the Matamo (formerly Piwik) 3rd party statistics tool. Provides enhanced metrics on top of Transversal's native statistics tracking.

_pk_ses Used by the Matamo (formerly Piwik) 3rd party statistics tool. Provides enhanced metrics on top of Transversal's native statistics tracking.

preferences In BBC Sounds, a cookie in the Radioplayer web console to remember whether you've seen certain one-time messages.

presets In BBC Sounds, a cookie in the Radioplayer web console to remember radio stations you've added to your My Stations (favourites).

primed In BBC Sounds, a cookie that allows the Radioplayer web console to work well on Safari on iOS devices.

rpsde_​client_id In BBC Sounds, used for analytics in the Radioplayer web console to recognise your device each time you visit.

sa_labels Allows the BBC to track which links on the BBC website a user has clicked on, so that we know what the previous BBC page was the user came from.

seencookieanno In BBC Sounds, a Radioplayer cookie that records whether you've been shown the message describing how cookies are used to store station favourites.

SID Remembers routes a user takes through the website/quizzes.

site24x7rumID Allows site availability to be measured based on actual visitor usage rather than polling from external machines every few minutes.

stations​listprefix In BBC Sounds, a Radioplayer cookie that helps make the A-Z station list work well by storing the last letter viewed.