Use GetCID Free to generate your 48-digit Confirmation ID (CID) from any 54 or 63-digit Installation ID, run fast bulk PIDKey Check (Windows & Office Key Check), verify Office Redeem Keys, and check Office 365 Accounts in seconds.
0xC004C008 / 0xC004C020) does not use any activation. However, checking an Online Retail key will use 1 PC online activation per check. To check only the product edition of an Online Retail key without using an activation, select Get Info Only.
Simple, 100% free online tools to generate Microsoft Confirmation IDs (GetCID Free), check Windows & Office product keys (PIDKey Check), and verify Office 365 accounts in seconds.
When Windows or Office asks to "Activate by telephone" (error 0xC004C008 or 0xC004C020), open slui 4 to find your 54-digit or 63-digit Installation ID. Paste it into our GetCID Free Generator to get your 48-digit Confirmation ID (Blocks A–H) in 2 seconds.
Check up to 50 Windows, Office, and Server product keys at the same time. Our PIDKey Check automatically detects the product certificate and shows the exact Edition Description, Sub-Type, Remaining MAK Count, and Error Code.
Safely check if an Office 2024/2021 Home & Business or Microsoft 365 key is unused before redeeming it at setup.office.com in Redeem Check, or verify up to 50 Office 365 logins in Office 365 Check.
Easy-to-follow tutorials for Windows 11/10 phone activation, Office Confirmation IDs, PIDKey Check error codes, Office 365 redeem keys, and official Microsoft software downloads.
slmgr.vbs /ipk <Product-Key> in Administrator Command Prompt.slui 4 (or run slmgr.vbs /dti) to copy your 63-digit Installation ID.cscript ospp.vbs /dinstid.cscript ospp.vbs /actcid:<48-Digit-CID>) to activate Office permanently.Online, 0xC004C008, 0xC004C020, 0xC004C003, 0xC004C060) and check remaining MAK counts.DISM /online /Set-Edition..img and .iso offline installers directly from Microsoft's CDN (officecdn.microsoft.com).Simple guide to understanding the status codes returned by Microsoft's activation servers.
| Status / Code | Tool | What It Means & What To Do |
|---|---|---|
| Online / Valid | PIDKey / Redeem | The product key is genuine, active, and ready for direct online activation or redemption at setup.office.com. |
| 0xC004C008 / 0xC004C020 | PIDKey Check | The key is genuine and can be activated using Phone Activation (0xC004C008 for Retail/OEM keys, 0xC004C020 for Volume MAK keys). Copy your Installation ID from slui 4 and paste it into the GetCID Free tab above to get your Confirmation ID for free! |
| 0xC004C003 / 0x67 / 0xC004C060 | PIDKey / GetCID | The product key has been blocked by Microsoft and can no longer be activated. You can buy a new, 100% working genuine key at an affordable price from ResellKeys.com. |
| Used / InvalidToken | Redeem Check | The Office redeem key has already been redeemed to a Microsoft account or was cancelled by the distributor. |
Clear answers to common questions about Microsoft phone activation and product key checking.
Most GetCID and PIDKey websites charge money per check or require paid API tokens. GetCID.cc is supported by sponsorships from trusted software partners, which lets us offer unlimited GetCID Free Confirmation ID generation, PIDKey Check, Office Redeem Check, and Office 365 Account Check completely free.
Checking Volume MAK remaining counts, checking Telephone Activation keys (0xC004C008 / 0xC004C020), and checking keys in Office Redeem Check never use an activation. However, if you run a full online check on an Online Retail key, Microsoft's server will use 1 PC online activation per check. If you only want to check what edition an Online Retail key is without using an activation, check the Get Info Only box before clicking Check.
Both 0xC004C008 (Retail / OEM) and 0xC004C020 (Volume MAK) mean your key is genuine and can be activated by phone! Enter the key on your PC, open the Telephone Activation Wizard (press Win + R and type slui 4, or run slmgr.vbs /dti), copy the 63-digit Installation ID, and paste it into our GetCID Free tab to get your 48-digit Confirmation ID in 2 seconds.
When Microsoft's server reports that a key is blocked (0xC004C003 / 0xC004C060 / 0x67) or has already been redeemed, that key cannot be activated anymore. You can buy a new, 100% working Windows or Office key at a lower, affordable price with instant delivery from ResellKeys.com.