Poker Networks

Poker Networks are formed in order to pool players and allow sites to offer busier tournaments and busier cash tables. Therefore although you may be playing on a account with a specific site, where the table branding and lobbies are specific to the site, and the promotions are specific to the site, you will often be playing against players from other sites without you knowing it. In other words you are competing against players on the same network, but not necessarily from the same site. Below you will find a list of some of the most significant sites on various networks:

iPoker Network
William Hill Review
Titan Poker
Sun Poker
Mansion Poker
TonyG Poker
Chili Poker
VC Poker

Merge Network
Carbon Poker (Now closed)
Aced Poker (Now closed)
Reefer Poker
Felt Stars
Sportsbook
Players Only

Cereus Network
Absolute Poker (Now closed)
Ultimate Poker (Now closed)

Party Poker Network
Party Poker
Empire Poker

Everleaf Gaming
WW Poker (Now closed)
Raider Poker
Minted Poker
Victory Poker

Microgaming Network (formerly Prima Poker Network)
Ladbrokes Poker
Purple Lounge
32Red Poker
Cool Hand Poker

Boss Poker Network (Boss Media)
Poker Heaven
Virgin Poker
Paradise Poker
Interpoker

Cake Network (later became Revolution Gaming)
Cake Poker (now closed)
Lock Poker (now closed)
Doyles Room
Only Poker

Ongame Network
Tower Gaming
RedKings
Hollywood Poker
Coral
Bwin
Bet24

Sites that are exclusively on their own network
Bodog Poker
Full Tilt Poker (moved to Pokerstars network at a later point, but now closed completely)
PKR Poker
PokerStars