How to Sign Up For Spam Calls [Step by Step Guide]

There are very few things which are more annoying than spam calls. Nobody wants to hear an automated voice on the other end when they pick up the phone, so if you are planning an evil prank or revenge on somebody, signing up for spam call is the perfect plan for you. 

Did you know that you can actually sign someone up to receive unwanted calls from telemarketing companies which will make them want to pull their hair out? In this article, we guide you through the process of signing someone up for spam calls.

Disclaimer

Before we start, we would like to clarify that the contents of this article are solely for educational purposes. We do not recommend using these methods in real life. Any and all consequences you may face for using them is not our responsibility, and we can not be held accountable. 

Now that that’s out of the way, let’s get right into giving someone’s phone number to telemarketers and signing them up for spam calls and texts. 

Note – This article is updated in February 2025. I’ve updated 5 news ways to to sign someone Up for spam calls and also how to protect from spam calls and it’s legal aspects.

How Do Telemarketers Get Access To Phone Numbers?

Have you ever wondered why you get spam calls? That’s because we unknowingly and involuntarily give our phone numbers to telemarketing companies when we overshare on the internet, this includes sharing our numbers on public profiles like Facebook, open access websites, and forums.

Another way telemarketers get your phone number is through credit bureaus and charities who sell your number to them. You might unknowingly give away the rights to share your contact information by accepting a site’s terms and conditions, and completely missing the fine print. 

Sometimes, the reasons could also be beyond your control, like organizations and big companies selling your contact information and personal data to third parties. However, if you intentionally want someone’s contact information to fall into the hands of telemarketers, there are a few things you can do, which will be discussed in the next section. 

Also Read: Don’t Click that Link! Signs That You’re About to Be Phished.

How To Sign Someone Up For Spam Calls?

Giving someone’s phone number to telemarketing companies requires very little effort, and there are so many ways to do it. In this section, we discuss some of the top methods you can use to sign someone up for spam calls in more detail. Read on to find out more. 

1. Using Automatic Number Identification

One of the easiest ways to get someone’s phone number in the hands of telemarketers is to call 800,888 or 900 on their phone. Doing so will make sure the phone number is captured by the Automatic Number Identification system. 

Once this is accomplished, the phone number will be identified and stored and brought to the attention of a wide web of digital markers in that area, who will soon begin incessantly pestering the phone number with spam calls. 

2. Sign Up For Free Trials

You will find plenty of online websites which promise free trials and prizes, the only requirement being you provide your personal information, including your phone number and email address. Some giveaways also promise a chance to win expensive products if you sign up with your phone number. 

As you may have already guessed, this is just a ploy to steal your contact information. These websites will call you to tell you that while you didn’t win anything, you have a chance to win in the future, and will keep calling you about other offers they have. 

Online surveys also fall into the same category as the caveat for those is also the provision of your contact information. You can use this method to sign up for all these trials, giveaways, and surveys using the target phone number. 

3. Post An Online Ad

Another way to set someone up for unwanted calls but by real people is by posting an ad online using their contact information. If you post an ad on a public platform like Craigslist, for an item or service at a ridiculously low price, people will immediately start spamming your phone with calls regarding the ad. 

You can use the target phone number to post a fake advertisement and the person’s phone will soon blow up with calls from random people regarding the item or service mentioned in the ad. 

4. Specific Websites to Register for Spam Calls

Several platforms and services exist where signing up a phone number leads to an influx of spam calls:

• Telemarketing lists – Websites that sell leads to telemarketers often distribute numbers widely.
• Online directories – Adding a phone number to business directories can lead to unwanted marketing calls.
• Survey and reward programs – Many reward-based survey websites require phone verification and later sell collected numbers to marketing firms.

5. Engage in Free Trials and Surveys

Many free trial services and online surveys require users to enter their phone numbers. These numbers often get shared with marketing agencies, leading to unwanted calls. Some common sources include:

• Streaming and subscription trials – Some services require phone verification and later use the data for promotions.
• Retail and shopping surveys – Completing forms for discounts or free products often results in spam calls.

6. Sign Up for Telemarketing Calls

Telemarketing companies rely on phone number databases to make sales calls. Signing up a number on business marketing lists can significantly increase the volume of spam calls. Some ways to do this include:

• Entering the number into lead generation forms on business websites.
• Registering for insurance, credit card, or loan pre-approvals.
• Signing up for business trade shows or industry newsletters.

7. Put Number on Public Social Media

Posting a phone number on social media platforms such as Facebook, Instagram, or Twitter makes it accessible to data scrapers and marketers. Some risks of publicly sharing a number include:

• Receiving promotional texts and calls.
• Being added to unknown marketing groups or spam messaging services.
• Potential privacy violations, leading to identity fraud risks.

8. Put Phone Number on Public Profiles

Listing a phone number on public business profiles, discussion forums, or classifieds (such as Craigslist) increases exposure to spam calls. To prevent this:

• Use a secondary phone number for public listings.
• Enable privacy settings to hide contact details where possible.
• Regularly monitor where the phone number is displayed online.

Also Read: The Absolute Worst Internet Ad Placements of All Time.

Spam Websites For Phone Numbers

You can also find various websites in which you can register a phone number to receive spam calls. Here are 5 top sites which can be used to sign someone up for spam calls. 

1. Wackyprankcalls.com

As the name suggests, this is one of the most used sites to prank call somebody. You can make fake calls to a phone number and also send text messages to spam their phone. In addition to having an easy user interface, this website also provides you with an alternative phone number to use while making calls to protect your anonymity. 

2. Sendrandomfacts.com

This is one of the most harmless websites to spam somebody’s phone. Through this website, you can send a ton of random facts about any topic to someone’s phone number. All you need to know is choose the type of fact and how many of them you wish to send. Bear in mind that this is a paid site and they charge $2.19 for 20 SMS. Additionally, they only operate in the US and Canada. 

3. Blowupthephone.com

True to its name, this website bombards the target’s phone number with unwanted calls and texts using multiple phone numbers. They offer a range of messages but you can also send custom messages if you wish to. Since this site uses so many phone numbers, the target would be unable to block all of them. This is also a paid site who operate only in Canada and the US, and charge  $2.19 for 20 SMS.

4. Easyprank.com

This site is excellent for making as many prank calls as you want to your target, but the only issue is that they do not hide your number, thus compromising your anonymity. Although, you can try using the site using an alias number to make spam calls. 

5. Messagebomber.com

This site offers a wide variety of pranks, including ‘fake craigslist phone prank’ and ‘endless cat spam’. They also let you send a ton of texts, random images and text bombs. They are a paid site who charge $2.19 for 20 SMS and only operate in the US and Canada. 

Also Read: How to Set Up and Customize your Outbound Caller ID?

Is It Illegal to Sign Someone Up for Spam Calls?

Signing someone up for spam calls without their consent can raise legal and ethical concerns. In many countries, such actions may violate privacy laws, such as the Telephone Consumer Protection Act (TCPA) in the U.S., which restricts unsolicited telemarketing calls. Additionally, General Data Protection Regulation (GDPR) in Europe protects individuals from unauthorized use of their contact details. Some jurisdictions may consider it harassment, making offenders subject to fines or legal actions. It’s crucial to be aware of these implications before engaging in such activities.

How to Protect Your Phone from Spam Calls

Spam calls can be annoying and even dangerous if they involve scams. Here are some effective ways to protect your phone from spam calls:

1. Use Built-in Call Blocking Features

• For Android: Go to Phone app → Settings → Call Blocking & Identification → Enable spam protection.
• For iPhone: Go to Settings → Phone → Silence Unknown Callers or Call Blocking & Identification.

2. Register with Do Not Disturb Services

• In India, register with DND (Do Not Disturb) via TRAI:
  • Send “START 0” to 1909 (via SMS or call) to block all promotional calls.
• In the US, register with the National Do Not Call Registry at donotcall.gov.

3. Use Third-Party Call Blocking Apps

• Truecaller (Android/iOS) – Identifies and blocks spam numbers.
• Hiya (Android/iOS) – Blocks robocalls and fraudulent calls.
• Nomorobo (US) – Filters telemarketers and robocalls.

4. Enable Carrier Spam Blocking

Most telecom operators provide free spam protection services:

• T-Mobile, AT&T, Verizon (US) – Offer spam blocking tools like Scam Shield.

5. Do Not Answer Unknown Numbers

• If you don’t recognize a number, let it go to voicemail. Scammers often hang up if they don’t get an immediate response.

6. Use Call Screening (Google Assistant Feature)

• Google Pixel and some Android phones can screen calls using AI to detect spam before you pick up.

7. Avoid Sharing Your Phone Number Publicly

• Be cautious about giving your number online or in surveys.
• Use a secondary number for sign-ups and registrations.

8. Report Spam Numbers

• India: Report spam calls via the TRAI DND 2.0 app.
• US: Report to FTC at reportfraud.ftc.gov.

By following these steps, you can reduce the number of spam calls and protect yourself from potential scams.

Conclusion

If you are looking for ways to sign someone up for spam calls, there are various ways in which you can do that. Some of the top methods are mentioned in this article. However, bear in mind that sharing someone’s phone number on the internet without their permission is a criminal offence. It is punishable offence called doxing, especially when done with malicious intent.