Depends on just what you mean, but the general answer is "no" they are not out of reach. Integrated PRS, ortho, uro, and neuro are all very competitive, but I'm not sure whether you are considering them surgical subspecialties. Even for those, you're scored above the average, and if you look at the "charting outcomes" pdf you'll see that even for these some 25% or so of the matching applicants had step 1 scores around 225-230. It probably depends very much on the rest of your resume... are your grades good, do you have any research experience, etc.? There might be programs out there with a "first pass" filter that cuts off applicants below 230, but there are many others that do not. As always, the prevailing wisdom is to strengthen your resume as much as possible and apply broadly, regardless of your step 1 score.
If you mean fellowships after a general surgery residency, then I'd think you are right in the thick of things. 228 is very much in the competitive range, especially so with a solid application/resume to back it up. Once in, your performance in residency will have about as much to do with landing the fellowship of your choice as anything else (well, except for perhaps where you do your residency if you are looking at a select few of the more rare and competitive fellowships).
But I'm certainly no expert on the match process. You beat the national average by a fair margin, and that means something. You're in the top third or so of all students who took step 1, so don't sell yourself short. Decide what it is you want to do, make sure you get to know the right people, make connections, do aways with solid performance at places that interest you, make sure your application is solid everywhere else, and interview well. Sounds easy, no? I'm sure you'll do fine. 😉