The 668 SIM check is Pakistan’s most powerful, fastest, and completely free tool to discover every mobile number registered on your CNIC. In a country where SIM fraud costs victims millions of rupees every year, this single three-digit number is your first line of defence against identity theft and unauthorized SIM registration.
In this guide, you will learn exactly how the 668 service works, what its reply means, what to do with the results, how to fix every possible error, and why checking your CNIC via 668 regularly could be the most important digital security habit you build in 2026.
Instant Answer: Open your SMS app → Type your 13-digit CNIC (no dashes) → Send to 668 → Receive a full list of all SIMs active on your CNIC within 60 seconds — completely free from any Pakistani network.
What Is the 668 SIM Check Service?
The 668 service is an official SMS-based verification system operated under PTA (Pakistan Telecommunication Authority) policy. It queries the national SIM registration database — the same database that NADRA and all four major telecom operators use — and returns a real-time list of every active mobile number biometrically linked to your CNIC.
This is not a third-party app. This is not a private service. 668 is Pakistan’s government-mandated citizen tool, created specifically so that every Pakistani can monitor their own SIM registration status without needing internet access, a smartphone app, or visiting a franchise.
The service was strengthened after the 2015 biometric verification campaign, which required every SIM in Pakistan to be re-verified against NADRA’s biometric database. Today, the 668 database reflects live, real-time SIM registrations across Jazz, Zong, Telenor, Ufone, and SCO networks.
You can also view this same data through Pakistan’s official SIM data portal — but 668 remains the fastest and most accessible method, especially for users without reliable internet.
Why the 668 SIM Check Is Critical in Pakistan 2026
Consider this scenario: A criminal steals your wallet, photocopies your CNIC, and uses it at a franchise to register 2 new SIMs. They use those SIMs to access your JazzCash account, intercept your bank OTPs, and drain your savings — all before you even notice your wallet is missing.
This is not hypothetical. This happens to thousands of Pakistanis every year.
The 668 check would have caught those unauthorized SIMs the moment they were registered. Regular checking — at least once per month — is the only way to know in real time if someone is misusing your CNIC.
Key reasons every Pakistani needs 668:
- PTA allows up to 5 SIMs per CNIC — criminals can register SIMs without your knowledge
- Biometric fraud using fake fingerprint moulds has been documented in Pakistan
- SIM swap fraud targeting JazzCash, Easypaisa, and bank accounts is rising sharply
- Many fraud victims discover unauthorized SIMs only after financial losses have already occurred
The 668 check takes 60 seconds. The damage from missing it can take years to recover from. For additional tools to monitor your mobile identity, visit Sim Database — Pakistan’s dedicated SIM verification resource.
How to Use 668 SIM Check — Complete Step-by-Step Guide
What You Need:
- Any active Pakistani SIM (Jazz, Zong, Telenor, Ufone, or SCO)
- Your 13-digit CNIC number
- SMS capability on your phone (no internet needed)
Step-by-Step Process:
Step 1: Unlock your phone and open the default SMS or Messages app.
Step 2: Tap “New Message” or “Compose.”
Step 3: In the To field, type: 668
Step 4: In the Message body, type your CNIC number. Use this exact format: 3520212345671
- This is 13 digits with no dashes, no spaces, no dots
- Double-check every digit before sending
Step 5: Tap Send.
Step 6: Wait for a reply SMS from 668. This usually arrives within 30 to 60 seconds.
Step 7: Read the reply carefully — it will list every active SIM registered on your CNIC.
How to Read the 668 Reply SMS — Complete Explanation
The 668 reply comes in a standard PTA format. Here is an example of what it looks like and what each part means:
Example Reply:
CNIC: 3520212345671
Registered SIMs: 3
1. 0312-XXXXXXX (Jazz)
2. 0333-XXXXXXX (Telenor)
3. 0311-XXXXXXX (Zong)Reading Your Results:
| What You See | What It Means |
|---|---|
| Your CNIC number confirmed | System verified your identity correctly |
| “Registered SIMs: 1” | Only 1 active SIM on your CNIC — you are safe |
| A number you recognise | Your legitimately owned SIM |
| A number you do NOT recognise | Potentially unauthorized — act immediately |
| “No SIMs registered” | Your CNIC has no active SIMs — unusual if you own a SIM |
| “Invalid CNIC” | You typed your CNIC incorrectly — check and retry |
What Each Network Code Means:
- 03xx (Jazz): Numbers starting with 0300, 0301, 0302, 0303
- 03xx (Zong): Numbers starting with 0310, 0311, 0312, 0313, 0314, 0315
- 03xx (Telenor): Numbers starting with 0340, 0341, 0342, 0343, 0344, 0345
- 03xx (Ufone): Numbers starting with 0331, 0332, 0333, 0334, 0335
- 03xx (SCO): Numbers starting with 0320, 0321 (AJK and Gilgit-Baltistan)
What to Do After Checking — Four Possible Outcomes
Outcome 1: All Numbers Are Yours ✅
Action: No immediate action needed. Set a calendar reminder to check again in 30 days. This is good digital hygiene.
Outcome 2: You See Fewer Numbers Than You Own ⚠️
Action: One of your SIMs may be temporarily deactivated or pending re-registration. Visit your operator’s franchise with your CNIC to investigate.
Outcome 3: You See an Unknown Number 🚨
Action: This is an emergency. Follow these steps immediately:
- Screenshot the 668 reply
- Call the operator associated with the unknown number (Jazz: 111, Zong: 310, Telenor: 345, Ufone: 333)
- Call PTA helpline: 0800-55055 (toll-free)
- File an online complaint at complaint.pta.gov.pk
- Visit your nearest police station to file an FIR for precaution
Outcome 4: “Invalid CNIC” Message ❌
Action: You have typed your CNIC incorrectly. Count the digits — it must be exactly 13. Remove all dashes and spaces. Try again.
668 Error Messages — Complete Troubleshooting Guide
Error: “Service Temporarily Unavailable”
Cause: PTA server overload during peak hours. Fix: Wait 15–20 minutes and try again. Try a different SIM or network.
Error: “Invalid Request Format”
Cause: CNIC typed incorrectly — with dashes, spaces, or wrong number of digits. Fix: Count your CNIC digits — must be exactly 13. Remove all formatting characters.
Error: No Reply After 5 Minutes
Cause: Possible SMS delivery issue, network congestion, or barred SIM. Fix: Try from a different SIM. Check if your outgoing SMS is working by sending a test message to a friend. Use the cnic.sims.pk web portal as an alternative.
Error: “CNIC Not Found”
Cause: Your CNIC is not registered in the NADRA database or there is a data mismatch. Fix: Visit your nearest NADRA office with your original CNIC to verify your records.
Error: Reply Shows 0 SIMs But You Own SIMs
Cause: Your SIM may be registered under a different CNIC (common after manual SIM registrations at non-biometric franchises before 2015). Fix: Visit your operator’s franchise with your CNIC and biometric to re-verify registration.
668 vs Other SIM Verification Methods — Which Is Best?
| Feature | 668 SMS | cnic.sims.pk Portal | Operator App | PTA Helpline |
|---|---|---|---|---|
| Speed | 30–60 seconds | 1–2 minutes | 1–2 minutes | 5–15 minutes |
| Internet needed | ❌ No | ✅ Yes | ✅ Yes | ❌ No |
| Works abroad | ❌ No | ✅ Yes | ✅ Yes | ❌ No |
| Shows all networks | ✅ Yes | ✅ Yes | ❌ Own only | ✅ Yes |
| Cost | Free | Free | Free | Free |
| Availability | 24/7 | 24/7 | 24/7 | Mon–Sat |
| Best for | Daily check | Visual overview | Own SIM only | Complaints |
Verdict: 668 is the best tool for regular monitoring. Use cnic.sims.pk when you need a screenshot or are abroad. Use the PTA helpline only for complaints and blocking requests.
How Criminals Bypass 668 Monitoring — And How to Stay Ahead
Understanding how SIM fraud works in Pakistan helps you protect yourself better:
Common criminal tactics:
- Photocopy fraud: Criminals obtain CNIC photocopies from hotels, banks, shops, or careless citizens and use them at low-compliance franchises to register SIMs.
- Biometric mould fraud: Rare but documented — criminals use gelatin or silicone moulds to mimic fingerprints and bypass biometric verification.
- Insider fraud: Corrupt franchise employees register SIMs on customer CNICs without authorization.
- Social engineering: Victims are tricked into giving CNIC numbers over phone calls, posing as bank or telecom staff.
How to stay ahead:
- Check 668 monthly without fail
- Never share your CNIC photocopy without writing “For [purpose] Only — [Date]” on it
- Enable two-step verification on all financial apps
- Register your alternate contact number with your bank for fraud alerts
- Track your activity with Pakistan’s official live tracker portal
668 SIM Check for Overseas Pakistanis
If you are living abroad, you cannot access the 668 short code from a foreign network. Here are your alternatives:
Option 1: cnic.sims.pk The PTA web portal works from any country with internet access. Use it exactly the same way — enter your CNIC and check your registered SIMs.
Option 2: NADRA Pak Identity App Available on Google Play and App Store globally. After identity verification, you can view your CNIC-linked SIM data.
Option 3: Ask a trusted family member Have a trusted person in Pakistan send the 668 SMS using their SIM on your behalf — they type your CNIC number and share the reply with you.
Option 4: Use NICOP If you hold a NICOP (National Identity Card for Overseas Pakistanis), you can use the same NICOP number for 668 verification in Pakistan.
Frequently Asked Questions About 668 SIM Check Pakistan
Q: Is the 668 SIM check really free in Pakistan? A: Yes. PTA mandates that the 668 service is provided free of charge by all operators. You will not be billed for the SMS. If any operator charges you, report it to PTA at 0800-55055.
Q: Can I check another person’s SIMs using their CNIC via 668? A: No. Entering someone else’s CNIC number and checking their SIM registrations is a violation of privacy law in Pakistan under PECA 2016. The 668 service is designed only for citizens to check their own CNIC.
Q: How often should I use the 668 SIM check? A: At minimum once per month. If you have recently shared your CNIC photocopy with any business or institution, check within 48 hours of that event.
Q: Does 668 work if my SIM is on low balance? A: Yes. The 668 SMS is a system message and does not require any balance. Even a zero-balance SIM can send this SMS successfully.
Q: I have 5 SIMs shown on 668 but I only use 3. Is this normal? A: No. If you only actively use 3 SIMs, 5 showing on 668 means 2 unauthorized SIMs exist on your CNIC. Contact PTA immediately.
Q: Can children’s CNICs be used to register SIMs illegally? A: Yes, and this happens. Parents should check their children’s CNICs via 668 as well, especially CNICs of minors who have recently obtained Form-B or CNIC.
Q: What if I want to keep a record of my 668 check? A: Screenshot the reply SMS immediately after receiving it. SMS messages can be accidentally deleted. Store the screenshot in your photos or cloud backup.
Q: Does 668 show ported numbers correctly? A: Yes. When a number is ported from one network to another via MNP (Mobile Number Portability / 667 service), the 668 database updates to reflect the new network while keeping the same number. Both before and after porting, the number remains visible under your CNIC.
Summary: Everything You Need to Know About 668 SIM Check
The 668 SIM check is one of the most powerful consumer protection tools available to Pakistani citizens in 2026. It is free, instant, requires no internet, and can literally save you from financial ruin if you use it regularly.
Key takeaways:
- Send your 13-digit CNIC (no dashes) to 668 via SMS
- The reply shows every active SIM on your CNIC across all networks
- Check at minimum once per month — more often if you have shared your CNIC recently
- If you see an unknown number, act immediately through PTA and your operator
- For additional monitoring tools and guides, visit Sim Owner Details — Pakistan’s most complete SIM verification platform
Do not wait until you are a fraud victim to check. Send the SMS to 668 right now — it takes 60 seconds and could protect everything you have worked for.
For a broader understanding of how Pakistan’s SIM data infrastructure works and what other tools are available to you, explore our official Pakistan SIM data guide.
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