PostalAnnex - Ada Share: Mail Services/Shipping PostalAnnex - Ada Visit Website Request Info 6749 Fulton St E Ste A ADA, Michigan 49301 (616) 227-8091 Facebook About Map About PostalAnnex offers a diverse range of services for businesses and individuals including shipping, private mailboxes, notary, printing, greeting cards, and assorted cards and gifts. What's Nearby? Distance: 5 10 15 20 25 50 mi.