By the Random IMEI Editorial Team | randomimei.com
A concise structural reference for test and educational use.
IMEI Format (15 Digits)
┌──────────┬────────┬─┐
│ TAC │ SNR │C│
│ 8 digits │6 digits│1│
└──────────┴────────┴─┘| Segment | Digits | Meaning |
|---|---|---|
| TAC (Type Allocation Code) | 1–8 | Identifies a device model in official allocation data |
| SNR (Serial Number) | 9–14 | Identifies a unit within the TAC allocation |
| CD (Check Digit) | 15 | Luhn checksum for error detection |
Total: 15 digits. No hyphens, no spaces (though often displayed as XX-XXXXXX-XXXXXX-X).
IMEISV Format (16 Digits)
┌──────────┬────────┬──┐
│ TAC │ SNR │SV│
│ 8 digits │6 digits│2 │
└──────────┴────────┴──┘- SV (Software Version): 2 digits, replaces the check digit
- Used in 3GPP signaling
- No Luhn check digit in IMEISV
Common TAC Codes by Manufacturer
| Manufacturer | Example prefix in local snapshot | Example profile |
|---|---|---|
| Apple | 35437977 | iPhone 15 Pro Max |
| Samsung | 35871071 | Galaxy S23 Ultra |
| 35281596 | Pixel 8 Pro | |
| Huawei | 86560706 | P60 Pro |
| Xiaomi | 86340051 | Xiaomi 14 Ultra |
| OnePlus | 86154506 | OnePlus 12 |
| Motorola | 35981753 | Razr 40 Ultra |
| Sony | 35004648 | Xperia 1 V |
These examples come from Random IMEI catalog snapshot 2025-11-02. They are not a live or authoritative GSMA lookup. See the methodology and source notes.
Luhn Check Digit Calculation
The 15th digit is computed via the Luhn algorithm:
- Take the first 14 digits
- From the rightmost, double every other digit
- If result > 9, subtract 9
- Sum all 14 processed digits
- Check digit =
(10 - (sum mod 10)) mod 10
Example: IMEI 3539110912345 6?
Digits: 3 5 3 9 1 1 0 9 1 2 3 4 5 6
Double: 3 10 3 18 1 2 0 18 1 4 3 8 5 12
Adjust: 3 1 3 9 1 2 0 9 1 4 3 8 5 3
Sum = 52 → Check = (10 - 52%10) % 10 = (10-2)%10 = 8IMEI: 353911091234568 ✅
IMEI vs. Related Identifiers
| Identifier | Length | Used For | Example |
|---|---|---|---|
| IMEI | 15 | 3GPP device identity | 353911091234568 |
| IMEISV | 16 | IMEI structure + software version | 3539110912345681 |
| MEID | 14 hex | CDMA device ID (legacy) | A0000012345678 |
| ESN | 8 hex | Old CDMA serial (deprecated) | 80AB1234 |
| ICCID | 19–20 | SIM card identifier | 8901260017641234567 |
| IMSI | Usually 15 | Subscriber identity on SIM | 310260123456789 |
Where to Find IMEI
| Method | Steps |
|---|---|
| Dial code | Dial *#06# on most phones |
| Settings (iOS) | Settings → General → About → IMEI |
| Settings (Android) | Settings → About Phone → IMEI |
| Physical | May appear on a SIM tray, back panel, or battery compartment |
| Packaging | Original box barcode label |
IMEI Blacklisting & Carrier Checks
- GSMA Device Registry: supports status exchange among eligible ecosystem participants
- National and carrier blocklists: coverage and propagation vary
- Carrier lock: a separate commercial restriction from blocklist status
- Random IMEI does not query any registry, carrier, blocklist, ownership or warranty system
Common Use Cases for IMEI Generation
| Use Case | Why |
|---|---|
| QA/Testing | Populate isolated fixtures with valid-format values |
| Device management | Test mock MDM workflows |
| Telecom development | Exercise offline parsing and validation |
| Database seeding | Fill non-production schemas with synthetic identifiers |
| Format validation | Verify a Luhn implementation |
⚠️ Generated values are synthetic fixtures. Never submit them to live carrier, activation, warranty, financing, insurance or identity systems; rules vary by jurisdiction.
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