What is the phone number for federal credit union? While 800-527-7328 is Security Service Federal Credit Union's best toll-free number, it is also the only way to get in touch with them.What is the routing number for regional federal credit union? REGIONAL FEDERAL CREDIT UNION ROUTING ABA NUMBER. 271991139 routing number is a 9-digit number designed and assigned to Regional Federal Credit Union by The American Bankers Association (ABA) to identify the financial institution upon which a payment was drawn. Regional Federal Credit Union routing numbers are also known as as "ABA numbers",...Where is service credit union located? Service Credit Union has 1 location in Massachusetts and 24 in New Hampshire. The credit union serves members from offices in Apo, Bedford, Concord, Derry, Epping, Exeter, Falmouth, Hampton, Hinsdale , Hudson, Keene, Lebanon, Manchester, Mannheim, Newington, Plymouth , Portsmouth, Rochester, Salem, Somersworth and Tilton.How many digits in a credit union account number? These are encoded on the bottom of your checks. The first nine digits (at the bottom, starting from left) are the credit union's routing number, followed by some punctuation, followed by your 14-digit account number.