Usually JDM engines never have a number after the letter (H22A, B16A, B18C, D15B, etc). The USDM ones have a number after the letter such as the D16Y7, D16Y8, D16Z6, D15B7, B18C1, B18C5. It's just a matter of memorizing the engines. Just study the world of Honda and these things should get stuck in your head.
The Honda D series inline-four cylinder engine is used in a variety of compact models, most commonly the Honda Civic, CRX, Logo, Stream, and first-generation Integra. Engine displacement ranges between 1.2 and 1.7 liters.Are you looking for an engine for your 95 Civic EX. I also troubled with the same problem and after 2 months I finally bought it from Japanese Engines | Used Japanese Engine | JDM Engines at very reasonable cost. You may also purchase from this website.