University Domains Guide

Understanding how university domain verification works and how to manage domain lists.

Overview
Understanding our university domain database and verification system

Our university domain database contains thousands of verified educational institution domains from around the world. This guide explains how domain verification works, how our database is maintained, and how you can work with domain lists in your applications.

How Domain Verification Works
Four-step process for validating university email domains
Step 1

Domain Extraction

We extract the domain from the email address (everything after the @ symbol).

student@university.edu → university.edu
john.doe@mail.harvard.edu → mail.harvard.edu
Step 2

Database Lookup

We check if the domain exists in our verified university database.

Step 3

Regional Filtering

We apply any regional restrictions based on your target group settings.

Step 4

Custom Domain Lists

We check against any custom domain allowlists in your target groups.

Database Coverage
Comprehensive global coverage of educational institutions

Global Coverage

190+

Countries

Institutions

10,000+

Universities

Domains

25,000+

Verified domains

Common Domain Patterns
Examples of university domain formats across different regions

Standard University Domains

stanford.edu        - Stanford University (US)
ox.ac.uk           - University of Oxford (UK)
utoronto.ca        - University of Toronto (Canada)
uni-heidelberg.de  - Heidelberg University (Germany)
u-tokyo.ac.jp      - University of Tokyo (Japan)

Student Email Subdomains

Many universities use subdomains for different user types:

student.university.edu    - Student emails
mail.university.edu       - General email system
alumni.university.edu     - Alumni emails
staff.university.edu      - Staff emails

International Formats

# United Kingdom
.ac.uk              - Academic institutions

# Germany  
.uni-*.de           - Universities
.fh-*.de            - Universities of Applied Sciences

# Australia
.edu.au             - Educational institutions

# Canada
.ca with institution name prefix
Working with Domain Lists
Search and validate university domains programmatically

Search University Domains

Search for domains by university name or country:

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Validate Domain

Check if a specific domain is in our database:

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Custom Domain Lists
Create target groups with custom domain allowlists for specific use cases

Creating a Custom Target Group

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Regional Targeting

Target specific regions without listing individual domains:

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Database Maintenance
How we keep our university domain database accurate and up-to-date

Regular Updates

Our domain database is updated regularly to ensure accuracy:

  • Monthly updates from official educational directories
  • Quarterly review of domain status and validity
  • Real-time addition of newly verified domains
  • Removal of expired or invalid domains

Missing Domains

If you encounter a legitimate university domain that's not in our database:

How to Report Missing Domains

  1. Verify the domain is actually used by the educational institution
  2. Check the institution's official website for confirmation
  3. Contact our support team with domain and institution details
  4. We'll review and add legitimate domains within 2-3 business days

Domain Status Monitoring

We continuously monitor domain status to maintain database quality:

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Best Practices
Essential guidelines for working with university domains

Do

  • • Use regional targeting for broad coverage
  • • Create specific target groups for precise targeting
  • • Cache domain validation results to improve performance
  • • Monitor for new domains relevant to your use case
  • • Report legitimate domains that are missing

Don't

  • • Assume all .edu domains are valid (some are not educational)
  • • Hardcode domain lists in your application
  • • Rely solely on domain endings for validation
  • • Include personal domains (gmail.com, yahoo.com) in target groups
  • • Forget to handle subdomain variations
Common Issues and Solutions
Troubleshooting common domain verification problems

Issue: Student email uses subdomain not in database

Example: student.email@mail.university.edu where only university.edu is in database

Solution: Our system automatically checks parent domains. If mail.university.edu isn't found, we check university.edu.

Issue: International university not recognized

Example: University in developing country with limited online presence

Solution: Contact support with official documentation. We prioritize adding institutions with verified accreditation.

Issue: Too many false positives

Example: Targeting too broad a region includes unwanted institutions

Solution: Create more specific target groups with curated domain lists rather than relying solely on regional filtering.

Advanced Usage
Advanced patterns for domain management and optimization

Dynamic Domain List Management

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Next Steps

Quick Start

Get started with the ClickyID API in just a few minutes.

Authentication

Learn how to authenticate your API requests and manage API keys.

Student Verification

Learn how to implement robust student email verification in your application.

API Reference

Complete reference for all ClickyID API endpoints.