POSTMARK CREDIT UNION Routing Number: 231381019
- Routing Number: 231381019
- Bank Name: POSTMARK CREDIT UNION
- Address: 2630 LINGLESTOWN ROAD
- State: PA
- Zip Code: 17110-3666
- Bank Phone: 717-671-5119
- Office Type: Main
- City: HARRISBURG
- Institution Status Code: 1