SSG Private RallyPoint Member 3785161 <div class="images-v2-count-0"></div>DA Form 61 under 27d and 28d its asks for Prior Service NO. (If applicable). Do I have one? I&#39;ve looked over my DD214 and have even asked my recruiters where I could find this number at or if its even applicable to me and haven&#39;t had any luck. Help. What is a "Prior Service Number"? How do I find out if I have one, and where can I find it? 2018-07-11T17:20:23-04:00 SSG Private RallyPoint Member 3785161 <div class="images-v2-count-0"></div>DA Form 61 under 27d and 28d its asks for Prior Service NO. (If applicable). Do I have one? I&#39;ve looked over my DD214 and have even asked my recruiters where I could find this number at or if its even applicable to me and haven&#39;t had any luck. Help. What is a "Prior Service Number"? How do I find out if I have one, and where can I find it? 2018-07-11T17:20:23-04:00 2018-07-11T17:20:23-04:00 SGM Bill Frazer 3788810 <div class="images-v2-count-0"></div>In the old days- up to Vietnam- you had a Service number, which was totally different the your SSAN, It went out the window about 69-70. Response by SGM Bill Frazer made Jul 12 at 2018 11:01 PM 2018-07-12T23:01:55-04:00 2018-07-12T23:01:55-04:00 2018-07-11T17:20:23-04:00