The SIM Information System (SIS) is an official online service provided by the Pakistan Telecommunication Authority (PTA). It allows Pakistani citizens to check how many SIM cards are registered against their CNIC and helps prevent misuse, fraud, and illegal SIM ownership.
This guide explains what SIS is, how to use it, why it is important, and how to block unauthorized SIMs.
What is SIM Information System (SIS)?
The SIM Information System is a PTA-managed platform that shows:
- Total SIMs registered on your CNIC
- Mobile network names (Jazz, Zong, Ufone, Telenor)
- Helps identify unknown or fake SIMs
PTA launched SIS to improve security, transparency, and digital safety.
Why SIM Information System is Important?
SIM misuse is often linked to:
- Fraud & scams
- Illegal activities
- Identity theft
Using SIS helps you:
✅ Protect your identity
✅ Avoid legal problems
✅ Keep your CNIC clean
✅ Comply with PTA regulations
How Many SIMs Are Allowed on One CNIC?
According to PTA rules:
👉 Maximum 5 SIMs are allowed on one CNIC
If you exceed this limit, you must block extra SIMs before buying a new one.
How to Check SIMs Registered on Your CNIC (2 Easy Methods)
Method 1: Check SIMs via PTA Website (Online)
- Visit PTA SIM Information System website
- Enter your CNIC number (without dashes)
- Complete verification
- View all registered SIMs instantly
✔ No OTP required
✔ Free service
Method 2: Check SIMs via SMS (Offline)
- Open SMS app
- Type your CNIC number (without dashes)
- Send it to 668
You will receive an SMS showing:
- Network names
- Number of SIMs registered
📱 SMS charges may apply
How to Block Unknown or Unwanted SIMs?
If you see a SIM that does not belong to you:
Option 1: Visit Franchise
- Visit the relevant mobile network franchise
- Carry original CNIC
- Request SIM blocking
Option 2: PTA Complaint
- File a complaint through PTA channels
- PTA will investigate and block the SIM
⚠ Never ignore unknown SIMs – they can cause legal trouble.
SIM Information System for Overseas Pakistanis
Overseas Pakistanis can also use SIS to:
- Check SIMs on CNIC
- Block unauthorized numbers
- Manage digital identity from abroad
This service is available 24/7 worldwide.
Common Problems & Solutions
❌ CNIC Not Showing SIMs
✔ Try again after some time
✔ Use SMS method (668)
❌ Unknown SIM Found
✔ Block immediately
✔ File PTA complaint
❌ Exceeded SIM Limit
✔ Deactivate unused SIMs
PTA SIM Rules – Important Points
- Biometric verification is mandatory
- SIMs without biometric verification are blocked
- One CNIC = max 5 SIMs
- Fake SIM registration is illegal
Frequently Asked Questions (FAQs)
Is SIM Information System free?
Yes, online checking is 100% free.
Can someone register SIM on my CNIC without biometrics?
No, biometric verification is mandatory.
How long does SIM blocking take?
Usually 24–48 hours.
Can I check SIMs for family members?
Only with their CNIC number.
Benefits of Using PTA SIM Information System
✔ Digital security
✔ Legal protection
✔ Easy SIM management
✔ Free & fast service
Final Words
The SIM Information System (SIS) is a powerful tool provided by PTA to protect citizens from SIM misuse and identity fraud. Every Pakistani should regularly check their registered SIMs and immediately block unknown numbers.
🔐 Your CNIC is your digital identity — protect it.