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It is extremely important that you provide Diamond with your updated contact information, including cell number and email address so that we can reach you regarding suspicious debit card or credit card activity. Contact us to update your email, phone and/or address, or update your info through NetBranch Online Banking .


To help ensure the security of your account(s) at Diamond, an expanded fraud detection and prevention service has been added on Diamond Visa Debit Cards at no cost to members. If you have provided Diamond with a cell number, this monitoring service will now alert you of possible unusual activity on your account(s) by text message. These messages originate from Diamond and may show as sender number 328-74. You will be prompted to respond using your cell. If no reply is received, the monitoring service will attempt to contact you by your phone numbers on file.

These texts will only ask members to verify if they did or did not make the purchase(s) in question. They will not ask for account or personal information. If you have any doubt on the validity of the text, or have general questions about this monitoring service, please contact Diamond’s Call Center at 800-593-1000. Verizon®, AT&T™, Sprint™ and T-Mobile® users within the U.S. will not be charged standard data or message rates for these alerts.

Keeping our members and their accounts secure…That’s younity!

For general questions, you can chat online with a Diamond Member Services Representative during regular business hours. When you chat, you will be communicating live with Diamond.

Diamond Credit Union Routing Number: 231385154

call center24-HOUR CALL CENTER
610-326-5490 / 800-593-1000

During Normal Business Hours: Choose from a list of automated options or connect with our Call Center for personal assistance.
Monday – Wednesday: 9:00 a.m. to 4:30 p.m. (Eastern Time)
Thursday & Friday: 9:00 a.m. to 7:00 p.m.
Saturday: 9:00 a.m. to 1:00 p.m.

After Hours Assistance: Diamond now offers after-hours support. A live person is available to answer questions and assist members, or in certain cases, a Diamond representative will follow-up the next business day.


Using a touch-tone phone, follow the prompts to get your account balances, transfer funds, and much more.
Telebranch: 610-326-2339 / 610-326-5490, option #2

IN PERSON – Branch Locations

Diamond currently has 5 locations to serve our membership. Click here for hours and locations.


Use our convenient email form below to submit your email address and your question/request. A Diamond Representative will respond by the end of the next business day. Please DO NOT include account numbers or sensitive information in this email.

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