Costa Rica WhatsApp Age and Gender Screening how to filter?

Here’s the answer: How do you screen WhatsApp numbers in Costa Rica?

Costa Rica’s national numbers are standardized as8-digit numbers, no area code, the country code is+506。 When filtering numbers, first unify the numbers as506 8-digit numbersInternational formats, followed by two layers of screening:Screening and opening(Confirm if the number is registered for WhatsApp) →The sieve is active(Confirm whether the numbers are online recently after registration.) If numbers are not standardized first, the last two steps are prone to errors; Standardization is the first step.

Quick check on Costa Rica’s number rules

Project	Explanation
Country code	+506
Local number digits	8-digit number (excluding country code)
Local format	XXXX XXXX (e.g., 8888 8888)
International format	506 XXXX XXXX (e.g., 506 8888 8888)
Domestic dial-up	Dial 8 digits directly, no area code or zero
Whether there is a regional area code	No distinction; there is only one country code nationwide

Costa Rica completed the upgrade of phone numbers from 7 digits to 8 digits around 2008, so the old 7-digit numbers are no longer in use. Now, all local phones (including mobile phones and landlines) use 8 digits.

The length of the phone number corresponds to common carriers

Costa Rica’s mobile and fixed numbers are the same length, both 8 digits, so you can’t judge the number type by the “digit.”

The main operators with public verifiability include:

• Kölbi（ICE）: Costa Rica’s state-owned telecommunications institution operates with wide coverage;
• Movistar: A brand under Telefónica;
• Claro: A brand under Mobile Americas.

About the number range: In public information, Costa Rican phone numbers are commonly used6、7、8At the beginning, there are also some parts2、3、4Mobile numbers starting with the phone. Carriers do not publicly disclose a complete set of number range allocation rules that can easily identify “which prefix belongs to which company,” so do not judge phones or landlines based solely on prefixes when filtering.

Number standardization: converts local format to international format

The screening tool generally requires data as+506The beginning. Common usage methods in the user’s raw data include:

Original input	Cleaning method	Standardized results
88888888	8 digits, directly add the country code	+50688888888
8888-8888	Remove the horizontal line and add the country code	+50688888888
50688888888	Already includes national code, added+	+50688888888
00506 8888 8888	Handle00Replace with+	+50688888888
+506 8888 8888	Remove the space, keep the plus sign	+50688888888

The standardization process can be summarized in four steps:

1. Remove all spaces, hyphens, and parentheses;
2. Exactly 8 digits left → add in front+506；
3. 11 remaining and starting with506Beginning → Add at the beginning+；
4. Other digits → Marked as abnormal numbers, check separately.

Input Example (CSV)

Name, Original Number, Standardized Result
User A, 8888-8888, 50688888888
User B, 506 6123 4567, 50661234567
User C, 506 8876 5432, 50688765432
User D, 71112233, 50671112233

The following is a demonstration of the logic, and the numbers are all examples and not real contact information.

Original number	Screening and activation results	Filter active results	Suggestion
88888888	Activated	Active	Enter the contact list
61234567	Activated	Inactive	Downgrade handling
88765432	Not activated	–	Exclude
22223333	Unable to verify	–	Rescreen after checking the format

Screen activation: Check whether the number is registered on WhatsApp

“‘Screening for activation’ means determining whether this number has already registered a WhatsApp account. The results are generally divided into three categories:”

• ActivatedThis number has a WhatsApp account;
• Not activatedThis number does not have a WhatsApp account.
• Unable to verify: Abnormal number format, number restricted, or detection channel temporarily unavailable.

“Activated” does not equal “active.” A person may have registered for WhatsApp but hasn’t used it for a long time. Therefore, filtering by activation is suitable for the first layer of screening, to first remove all numbers that do not have WhatsApp.

Filter activity: Check whether the account has been active recently

“Filtering activity” refers to continuing to check whether the account has been recently online based on the already activated number. Typical results include:

• Active: Recent online activity;
• Inactive: Has not been online for a long time;
• Unknown: The other party has set their online status to hidden, or the detection channel cannot receive a signal.

For reach-based businesses, the significance of filtering active users lies in the fact that an account that has been activated but not logged in for half a year often yields much lower returns from message delivery compared to a recently active account. Separating active and inactive accounts helps to control ineffective reach.

How to understand the screening results

Sift open and pass through	Screen for active users	Meaning	General action
Activated	Active	The account exists and is currently online	As the main reach list
Already open	Inactive	The account exists but has not been used for a long time	Downgrade or temporarily not reach
Already open	Unknown	The account exists, but the online status is invisible	Decided according to business strategy
Not yet opened	–	No WhatsApp account	Directly exclude
Cannot be verified	–	Formatting errors or limitations	First, check the number format

Note: Screening results are affected by platform privacy settings, risk control mechanisms, and network status, and there is no “100% accuracy” promise. Before official launch, it is recommended to manually verify small batches of results.

Common mistakes and troubleshooting

1. Add 0 before the 8-digit number: Local dial-up in Costa Rica does not add 0; adding 0 will turn it into 9 digits, which directly reports a formatting error.
2. Still using the old 7-digit number: Since 2008, it has been standardized to 8 digits; 7-digit numbers are considered invalid.
3. Missed+Number：50688888888Give me+50688888888Many tools have different parsing results, and missing the plus sign may cause recognition failure.
4. There is clearly a country code, but it adds 00 in front: In the file data, just+506Or506, No need for international dialing prefixes00。
5. Import directly with spaces and lines: Some tools cannot be cleaned automatically and require pre-treatment.
6. Sitting on the machine screen is active: Landline registration for WhatsApp is rare; it’s more meaningful to screen and activate first rather than directly screening active users.
7. Operators are judged by prefixes: Costa Rica does not have a publicly disclosed stable rule of “certain prefix = certain operator,” which is prone to misjudgment.

WhatsApp usage in Costa Rica

Public information shows that WhatsApp is one of the most widely used instant messaging apps in Latin America, and Costa Rica is no exception. Many local businesses display WhatsApp contact numbers on store signs, official websites, and social media homepages, and often respond to customer inquiries through WhatsApp Business. Specific user penetration rates and daily active users should be based on the latest publicly available survey reports; it is not recommended to rely on outdated data as a basis for decision-making.

Compliance Considerations

• Only handle legally obtained and business-related number data; do not collect, purchase, or resell personal numbers.
• Users must obtain informed consent before reaching and respect their right to refuse to accept such information.
• Costa Rica has a Personal Data Protection Law (Law No. 8968), which requires a legal basis for processing personal information.
• When using WhatsApp for business communication, you should also comply with WhatsApp’s official business policies.
• The screening discussed in this article is only for customer data governance and compliance outreach preparation, and is not used for harassment, fraud, or bypassing platform risk controls.

Relevant country area codes

The following countries are also often included in the same batch of Latin American data as Costa Rica:

Country	International area code
Panama	+507
Nicaragua	+505
Honduras	+504
El Salvador	+503
Guatemala	+502
Belize	+501
Mexico	+52
Colombia	+57

Use AppShai to screen Costa Rica’s WhatsApp numbers

Operation process on the AppShai (AppShai) platform:

1. Import number files, format supports tables or CSV;
2. Screening country selectionCosta Rica, the system will automatically process 506 standardization;
3. First, let’s do itEnable screening, excluding unactivated numbers;
4. Then proceed according to business needsActive filtering, online status filtering, online duration filtering；
5. Export lists with screening results for subsequent compliance outreach.

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