List of Gambling Websites
Online casinos, sports betting, poker, lotteries, bingo and gambling affiliate sites, categorized and kept current. This page gives the size and shape of the list for teams that need to block, exclude or audit gambling. It does not name or promote any gambling site.
How many gambling websites are there?
Across over 120 million categorized domains, 2,268,282 carry the Gambling category. For 2,250,311 of them, gambling is the main subject. Gambling sites rarely do anything else, so the strict and broad lists are almost the same.
For safety teams, that is good news. A gambling rule built on this category produces very few surprises, because almost every domain in it is there for one reason only.
All gambling domains
Every domain where gambling is part of the site, including affiliate and review sites that push players to operators.
Gambling first
Domains where gambling is the main subject. The base for block and exclusion lists.
Popular gambling domains
Gambling domains among the 300,000 most popular sites. That is a larger share than news holds in the same set.
IAB Casinos & Gambling
The main IAB version 3 subject for gambling sites, under the Attractions tier.
Why gambling is so visible: gambling operators run many domains at once, often one per market, brand or campaign, and replace blocked domains with new ones. That keeps the count high and makes a category list more useful than any hand-made list.
Gambling subcategories in the IAB Content Taxonomy
The IAB tiers separate types of gambling, which matters because rules differ by type. Lotteries, sports betting and casino games are often regulated differently. These are the full-database counts for IAB version 3.
| IAB v3 subcategory | Domains | What it covers |
|---|---|---|
| Attractions > Casinos & Gambling | 1,887,248 | Online casinos, slots, table games, betting and land-based casino sites |
| Sports > Poker and Professional Gambling | 201,105 | Poker rooms, poker news and professional gambling content |
| Shopping > Lotteries and Scratchcards | 133,217 | Lotteries, scratchcards, prize draws and lottery results |
Subjects among popular gambling domains
Inside the 25,328 popular gambling domains, these IAB subjects appear most often. They show the different faces of gambling online.
Bonus and coupon sites
208 popular gambling domains carry the coupons subject. These are bonus code and promotion sites that send traffic to operators.
Games that look like gambling
Mobile games and card games with real-money or prize features sit near the border of gaming and gambling. The category flags them; your policy decides.
Fantasy sports and racing
Fantasy sports and horse racing sites are treated as gambling in some markets and not in others. Separate tiers let you match local rules.
The IAB categories list explains each tier, and the taxonomy page shows the full tree.
An IAB version 2 blind spot
Teams that still rely on IAB version 2 alone should know this. In version 2, many online casino and slot sites are described as video game genres, not as gambling.
What this means: a brand safety rule that blocks only the version 2 gambling tier would miss most popular gambling sites. Use the Gambling web filtering category, or the version 3 tiers, as the main signal. Both sit in the same row.
Read why both versions ship side by side on dual taxonomy categorization, and what changed between versions on IAB 3.0 vs 3.1.
Gambling domains by ending
Gambling sites use a very different mix of endings than other categories. Low-cost and new endings are common, because operators and affiliates register many domains and replace them often.
| Ending | Gambling domains | Share of that ending |
|---|---|---|
| .net | 154,725 | One of the two largest gambling endings after .com |
| .org | 152,998 | Often used for review and affiliate sites |
| .xyz | 51,725 | 7% of 709,014 .xyz domains |
| .top | 48,773 | Low-cost ending, heavily used |
| .vip | 36,975 | 23% of 163,659 .vip domains |
| .site | 35,407 | Low-cost ending |
| .online | 30,622 | Low-cost ending |
| .bet | 19,442 | 78% of 24,809 .bet domains |
| .club | 19,169 | Mixed use |
| .casino | 10,453 | 88% of 11,891 .casino domains |
| .win | 7,027 | 42% of 16,789 .win domains |
Blocking by ending alone
- Catches most .bet and .casino domains
- Misses the hundreds of thousands on .com, .net and .org
- Blocks legitimate sites that share the ending
- Does nothing against new domains on common endings
Blocking by category
- Works on every ending, old or new
- Leaves non-gambling sites on the same ending alone
- Picks up new domains as they are categorized daily
- Can be tuned by gambling type with IAB tiers
Among the 25,328 popular gambling domains, 14,878 use .com. For context on all endings, see the top-level domains list.
Where gambling sites are based
Gambling sites are hard to place. Of the 25,328 popular gambling domains, only 2,285 have a country assigned, about 9%. For shopping or government sites, the share is far higher.
Split of the gambling domains with a known country
Why country is a weak filter here: many gambling sites target several markets from one domain or hide where they operate. For compliance, rely on the category and treat the country field as a hint, not a rule. Check the current rules of each market you serve.
How popular are gambling websites?
Gambling reaches the top of the web. These are the popular gambling domains in each global band.
| Global popularity band | Gambling domains | What this means for safety teams |
|---|---|---|
| Top 1,000 | 31 | Large operators and lotteries with mass audiences |
| 1,001 to 5,000 | 143 | Big national brands and betting exchanges |
| 5,001 to 10,000 | 194 | Strong regional operators and affiliates |
| 10,001 to 50,000 | 1,897 | Mid-sized operators and review sites |
| 50,001 to 100,000 | 2,823 | Smaller brands, mirror domains, affiliates |
| 100,001 to 500,000 | 20,179 | The long tail of casinos, bonus sites and copies |
Gambling has 31 domains in the global top 1,000 of our popular set, close to education (37) and well ahead of travel (14) and health (6). That shows how much traffic it draws, and why brand safety teams cannot treat it as a niche. Popular gambling sites need the closest watch.
Gambling and its neighbouring categories
Gambling borders several other categories. Knowing where the lines are helps you avoid both gaps and over-blocking.
| Category | Domains | How it relates to gambling |
|---|---|---|
| Gaming | 1,136,154 | Video games are kept apart; social casino and loot-box style games sit on the border |
| Sports & Recreation | 2,872,482 | Sports news with odds, tipsters and fantasy leagues |
| Cryptocurrency | 57,237 | Some casinos accept or promote crypto; check both categories |
| Advertising/Marketing | 2,856,394 | Affiliate networks and bonus promotion pages |
| Parked / For-Sale Domains | 596,148 | Where expired gambling domains often end up |
Because each row lists all categories of a domain, you can write precise rules such as "block Gambling, allow Sports & Recreation unless Gambling is also present".
Questions compliance teams ask
Before they rely on a gambling list, compliance and safety teams usually want answers to these questions.
Does the list show licensed vs unlicensed?
No. It shows that a site offers or promotes gambling. Licence status is set by each regulator, so match the list with the official register in your market.
Can rules differ by market?
Yes. Use the IAB tiers to treat lotteries, sports betting, poker and casino games differently, so each market gets the rule its regulator expects.
How are affiliate sites handled?
Review, bonus and comparison sites that promote operators carry the Gambling category, so they are blocked along with operators.
Are social casino games included?
Sites that present casino-style games are categorized by what they show. Use the IAB tiers and the Gaming category to set your own rule.
Can the list run offline?
Yes. It is delivered as files that run inside your own systems, including air-gapped setups, with a lookup API included in licences.
Will we see the domain names?
Licence holders get the full domain list. This public page shows counts only, so it does not advertise any operator.
Who uses a list of gambling websites, and why
Almost every buyer of this list wants to keep gambling out of somewhere, or to handle it under special rules. The same file serves an ad platform, a school network and a self-exclusion app.
Advertisers and agencies
Keep ads off gambling pages, and keep gambling ads away from audiences they must not reach. See brand safety advertising.
SSPs, DSPs and ad networks
Label gambling supply and demand so it can be handled under stricter rules in each market. See programmatic advertising and RTB.
Compliance and risk teams
Show that gambling content is filtered or excluded where rules require it, with a list that is refreshed and auditable.
Payment and fintech risk
Check merchant websites during onboarding and spot merchants whose site turns out to be gambling.
Schools and parental controls
Block gambling for children and teens on school networks and family devices. See parental controls and family safety.
Employers and network teams
Block gambling on work networks for policy and security reasons. See web content filtering.
Telecom operators
Offer gambling blocking to customers, or apply blocks where local rules require them. See telecom carrier services.
Responsible gambling tools
Self-exclusion and blocking apps help people who want to stop gambling. They need a list that keeps up with new domains. See DNS filtering.
Columns included in the gambling list
The gambling list has the same fields as the rest of the database, one row per domain, as CSV, Parquet or JSON. Licensed customers can also export it in blocklist formats for their own systems.
| Field | What it holds | Use in safety and compliance |
|---|---|---|
| Domain | The gambling domain | Block, exclude or match against logs |
| IAB v2 Tier 1 to 4 | Version 2 subject | Legacy ad platforms; note the blind spot above |
| IAB v3 Tier 1 to 4 | Version 3 subject | Casino, poker or lottery split |
| Web filtering categories | Gambling plus any other categories | The main block signal |
| Audience personas | Typical visitor profiles | Audience risk assessment |
| Country | Home country where one can be assigned | A hint for market rules |
| Global popularity band | Worldwide popularity among real users | Prioritise reviews and audits |
| Country popularity band | Popularity within the home country | Spot local leaders |
The web filtering categories field is the one most teams use for blocking, because it gives one clear Gambling flag. The IAB tiers add the detail needed for market-specific rules. Check how any single site is categorized with the domain checker before you write a rule.
How to build a gambling exclusion list
A good exclusion list is wide enough to catch new domains and precise enough not to hurt legitimate sites. These steps work for most teams.
Start with the category
Take every domain with the Gambling category, not only the main subject. Affiliates with mixed content are caught too.
Add the IAB v3 tiers
Use Casinos & Gambling, Poker and Lotteries tiers as a second signal, and as a way to split by type.
Decide on edge cases
Fantasy sports, horse racing news, sweepstakes and social casino games. Write a rule for each.
Keep sports news open
Sports sites with betting odds next to news may carry Sports & Recreation as their main subject. Decide whether the odds section matters to you.
Feed new domains daily
About 300,000 new domains are categorized every day. Adding the daily delta closes the gap new gambling domains rely on.
Audit by popularity
Review the most popular gambling domains first. They carry most of the risk for brand safety.
Why gambling lists go stale fast
Gambling is one of the fastest moving categories. Operators launch mirror domains when one is blocked, affiliates spin up bonus pages for each campaign, and seasonal sports events bring waves of new sites.
Mirror domains
Copies of the same site on new domains. Many show the same content, so they are categorized as soon as they go live.
Late content
Some gambling domains launch empty and add content later. Each new domain is checked again after a week and after a month.
Expired domains
Old gambling domains that expire and turn parked move to the Parked / For-Sale category.
Monthly refresh
All other domains are refreshed monthly, so a site that stopped offering gambling leaves the list.
See coverage and freshness for how the refresh cycle works. For low-quality ad inventory beyond gambling, see the made for advertising sites list and ad fraud prevention.
Gambling website list FAQ
How many gambling websites are there?
Our database of over 120 million categorized domains contains 2,268,282 domains with the Gambling category. For 2,250,311 of them, gambling is the main subject of the site.
Why does this page not name any gambling websites?
This page is written for brand safety and compliance teams. We publish counts and subcategories only and do not promote or name individual gambling sites. The full domain list is available to licence holders.
What subcategories of gambling are in the list?
In IAB version 3, the main gambling subjects are Casinos & Gambling with 1,887,248 domains, Poker and Professional Gambling with 201,105 and Lotteries and Scratchcards with 133,217. Sports betting, horse racing and fantasy sports also appear.
Can I block gambling sites by domain ending?
Only partly. Endings such as .bet and .casino are mostly gambling, but most gambling domains use .com, .net, .org and low-cost endings such as .xyz, .top and .vip. A category list catches them regardless of ending.
Who uses a list of gambling websites?
Advertisers and adtech platforms for brand safety, compliance and risk teams, payment providers, schools and parental control products, network security teams, telecom operators and responsible gambling tools.
How do I get the full list of gambling websites?
The full list is part of the licensed database. See the pricing page for database sizes and licence options.
Get the full gambling domain list
All 2.27 million gambling domains with IAB tiers, popularity bands and daily new domains, for brand safety, compliance and filtering inside your own systems.
See pricing and licences Choose a database sizeIAB and the IAB Content Taxonomy are trademarks of the Interactive Advertising Bureau, used here only to identify the taxonomy.
URL Categorization Database is not affiliated with, sponsored or endorsed by the Interactive Advertising Bureau. This page describes data for safety and compliance and does not promote gambling.