Math
10,000 possibilities
4-digit codes from 0000 to 9999 give exactly 10,000 outcomes—that is why PINs feel “small” but lotteries feel huge.
Random 4 Digit Number Combination
2124
Did you know
4-digit numbers in the wild
Quick, trustworthy snippets you can actually use—math, odds, and real-world places these lengths show up.
Security
Why simple PINs show up often
Studies of leaked PIN data show sequences like 1234 and 1111 still dominate; random picks spread risk more evenly than birthdays.
Culture
The number four in East Asia
In Mandarin and several other languages, “four” can sound like the word for death, so some people skip 4 in floors, plates, or PINs—purely cultural preference, not math.
Odds
One random guess
Pick a single 4-digit code at random and you have a 1 in 10,000 chance of matching a specific target—easy to say, hard to hit.
Travel
Hotel safes
Room safes usually default to 4 digits because guests can memorize them after one trip and staff can reset them quickly.
Time
Years on a screen
Dates like 2026 are 4-digit years; your brain treats them as labels, but they are the same width as a bank PIN.
Random 4 digit combinations
Random 4 digit Number combinations starting with 0
0738
0610
0620
0304
0798
0241
0128
0716
0410
0646
Random 4 digit Number combinations starting with 1
1295
1941
1569
1630
1490
1879
1820
1353
1316
1741
Random 4 digit Number combinations starting with 2
2389
2427
2294
2081
2992
2859
2704
2888
2880
2305
Random 4 digit Number combinations starting with 3
3319
3493
3749
3553
3071
3449
3522
3856
3474
3363
Random 4 digit Number combinations starting with 4
4823
4003
4867
4179
4790
4243
4885
4166
4955
4811
Random 4 digit Number combinations starting with 5
5414
5231
5432
5028
5431
5132
5364
5462
5710
5441
Random 4 digit Number combinations starting with 6
6966
6812
6120
6009
6492
6019
6823
6954
6444
6776
Random 4 digit Number combinations starting with 7
7765
7405
7511
7844
7355
7526
7871
7954
7330
7459
Random 4 digit Number combinations starting with 8
8935
8278
8295
8101
8513
8328
8110
8282
8723
8978
Random 4 digit Number combinations starting with 9
9565
9917
9855
9225
9133
9568
9128
9452
9970
9837