Summary: The actual design of the mark of the beast is not known, but the spirit of the mark of the beast is in exsistance today.
“The Mark of the Beast”
Elder Melvin L. Maughmer, Jr.
The mark of the beast is something that many people are curious about but have great reservations in trying to fully understand. Superstitions, uncertainty, and fear have gripped the minds of people and have caused society to live a life of total speculation and in fear of that mysterious mark. Oftentimes people associate the number of the beast, which according to Revelation 13:18 (quickview)  is 666 as the mark of the beast. “Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.” This is the numerical value of the beast’s name NOT THE MARK ITSELF.
Before numbers became accepted in society, letters of the alphabet were used to represent numbers, which meant that many letters also have a numeric value to them. Most people are familiar with the Roman numeral system, where letters have a numeric value to them, like I=1, V=5, X=10, L=50, C=100, M=1000 and so on. The Bible, which originally was written in Greek and Hebrew, also use a similar alpha/numeric system; therefore causing many letters to have a numeric expression to them also. The name of the beast of Revelation will have a name that will add up to six hundred threescore and six, the infamous 666. Understand that just because a person has 6 letters in their first name, 6 letters in their middle name and 6 letters in their last name does not qualify them as being the anti-christ. I remember when President Reagan was in office, because his name is Ronald Wilson Reagan, having 6 letters in each, that he was the anti-christ. As the popular slang saying is NOT!!! It is also imperative that people understand that just because you buy something at the store and you bill total is $6.66 does not mean that you are eternally cursed and headed straight to hell, so don’t pass go and don’t collect $200.00. It is “FOR NOW” just the number of man.
There are needless to say many interpretations of that infamous number 666, whether due to Greek, Hebrew, or Roman numerical structure and who is to say that one from the other is the exact interpretation. The Bible says in 2nd Peter 1:20 “Knowing this first, that no prophecy of the scripture is of any private interpretation.” I believe that we are all given a portion of the exact interpretation and when we put all of them together we come with the fullness of the interpretation. This is my portion of the meaning of that infamous number 666. The number 6 is 1 short of the number 7. The number 7 is God’s number, it represents perfection and completeness of spiritual things. The number 6 is short of perfection and completeness because it lacks the common denominator the 1 and only God. 6 is the number of man, for without God he falls short of perfection and is incomplete without Him. Therefore the number 6 is incompleteness and imperfection of man and is man’s number or the number of man as Revelation 13:18 (quickview)  says. The number 3, the second most mentioned number in the Bible, represent fullness. The number 3 speaks of solidity it is the symbol of fullness. It denotes Divine testimony and represents the 3 manifestations of God. Fullness means not lacking in any essentials being at the highest or greatest degree. Fullness: Father, Son, and Holy Ghost, Omniscience, Omnipotent, Omnipresence. Fullness: Body, Soul, Spirit, Death, Burial, Resurrection. Fullness: Outer Court, Inner Court, Holy of Holies, Tabernacle, Temple, Pentecost, 30, 60, 100 fold, fruit, more fruit, much fruit Faith, Goodness, Mercy, Peter, James, John, there were 3 crosses on Calvary, 3 men died 3 different deaths, 1 died in sin, 1 died to sin, and the 1 died for sin. Fullness