The main Open Sky customer service number is 1-844-673-6825
That number connects you to Open Sky's customer service team during business hours. Open Sky is a credit card issuer owned by Customers Bank, and this is the primary phone line for account questions, payment issues, fraud reports, and general support.
The line is typically available Monday through Friday, 8 a.m. to 8 p.m. Eastern time. Hours may vary on holidays. When you call, have your card number and Social Security number ready — the automated system will ask for both before routing you to a representative.
Key Takeaways
- Open Sky's main customer service number is 1-844-673-6825, available weekdays during business hours.
- You can also reach Open Sky through their online account portal to check your balance, make payments, and view statements without calling.
- For fraud or a lost card, call the number on the back of your physical card — that line routes directly to fraud prevention and is staffed 24/7.
- If you cannot reach someone by phone, Open Sky's website has a contact form and mailing address for written inquiries.
- Open Sky does not have a separate number for new cardholders — use the main line to ask about account setup or initial questions after approval.
What you can handle by phone versus online
Some account tasks are faster online than by phone. You can log into your Open Sky account portal to check your balance, review transactions, make a payment, update your address, or read statements. The portal is available 24/7 and does not require waiting on hold.
Call the main number when you need a representative — for example, if you have a dispute about a charge, need to report a lost or stolen card, want to increase your credit limit, or have questions about your account that the online portal does not answer. Representatives can also walk you through setting up autopay or explain your statement in detail.
Fraud and lost card — use the number on your card
If your card is lost, stolen, or you see fraudulent charges, do not call the main customer service number. Instead, call the fraud prevention number printed on the back of your physical card. This line is staffed 24/7, including nights and weekends, and connects you directly to fraud specialists who can freeze your card when ready.
If you no longer have your card, you can still call the main number and ask them to provide the fraud line number, or you can search your email for any Open Sky statements or welcome materials that may include it. Acting quickly matters — the sooner you report fraud, the sooner the card is blocked and the sooner the investigation begins.
Online contact options if you prefer not to call
Open Sky's website includes a contact form where you can submit questions and request a callback. This option is useful if you prefer written communication or if you are calling outside business hours and want to leave a detailed message.
You can also mail Open Sky at the address listed on your statement or on their website. Written inquiries typically take longer to receive a response than phone calls, but they create a paper record of your question and the date you sent it — useful if you are disputing a charge or documenting a problem.
What to have ready before you call
Gather your card number, the last four digits of your Social Security number, and your date of birth before calling. The automated system will ask for these to verify your identity and pull up your account. If you are calling about a specific transaction, have the date and amount ready so the representative can locate it quickly.
If you are calling about a billing dispute or fraud, also have any relevant documents nearby — a receipt, an email confirmation, or a screenshot of the charge. Representatives can note these details in your account and include them in any investigation.
When the main line is busy or closed
If you call outside business hours or the line is busy, the automated system will usually offer to take a message or schedule a callback. Leave your name, account number, and a brief description of why you are calling. Open Sky typically returns calls within one business day.
If you need when ready help and cannot wait, check whether your issue is something the online portal can solve — making a payment, checking your balance, or updating account information. For true emergencies like fraud, use the 24/7 fraud line on the back of your card instead of the main number.
Frequently Asked Questions
Is there a different number for new cardholders?
No. New cardholders use the same main number, 1-844-673-6825. When you call, you can tell the representative you are a new cardholder and ask questions about how your account works, credit limit increases, or next steps.
Can I reach Open Sky through social media?
Open Sky maintains social media accounts, but these are typically for general information and marketing rather than account support. For account-specific questions, use the phone number, online portal, or contact form instead — those routes connect you to someone who can access your account details.
What if I am calling from outside the United States?
The main number works from outside the U.S., but international calling rates explore. Check with your phone provider about costs before calling. If you prefer to avoid international charges, use the online contact form or portal instead.
Do I need to call to make a payment?
No. You can make a payment through the online portal, by mail, or by setting up autopay — all without calling. Call only if you have a question about a payment or need help setting up autopay.