Cool Serial Numbers on Currency

1. Ascending Ladder

With an ascending ladder serial number, each digit is one number higher than the previous one. Examples: 01234567, 12345678, 23456789, 45678910

2. Descending Ladder

With a descending ladder serial number, each digit is one number lower than the previous one. Examples: 10987654, 98765432, 87654321, 76543210

3. Solid

Solid serial numbers are on banknotes with every digit being the same. Examples: 11111111, 22222222, 33333333, 44444444, 55555555, 66666666, 77777777, 88888888, 99999999

4. Radar

With radar serial numbers, you can read them the same front to back, almost like a mirror image. Examples: 12344321, 00122100, 00011000, 44511544

5. Repeater

Repeater serial numbers are ones that any two or four digits repeat. Examples: 02020202, 00020002, 59335933, 29292929, 11121112

6. Radar Repeater

Radar repeaters are a combination of both radar and repeater serial numbers. Examples: 15511551, 84488448, 64466446, 91199119, 34433443

7. Rotator

Rotator serial numbers can only have 0, 1, 6, 8, and 9’s in the serial number. Imagine a rotational axis at the central digit position. Examples: 66600999, 00088000, 00669900, 6961969

8. Radar Rotator

Radar rotator serial numbers are those with both a radar and a rotating serial number. Examples: 88800888, 08800880, 00088000, 88811888, 11188111

9. Super Radar

Super radar serial numbers are special among collectors. With super radars, the internal digits are all the same. Examples: 90000009, 60000006, 20000002

10. Super Repeater

Many collectors enjoy super repeaters. Super repeater serial numbers have two digits that repeat four times. Examples: 12121212, 54545454, 91919191, 08080808

11. Seven in a Row

Seven in a row serial numbers have seven digits consecutively which are all the same. Examples: 11111112, 87777777, 54444444, 98888888, 12222222, 32222222

12. Seven of a Kind

Seven of a kind serial numbers seven out of eight digits all being the same. Examples: 11211111, 55555655, 88838888, 44444447

13. Binary

In a binary serial number, only two of the same digits are present. Collectors refer to a true binary serial number only having only (1’s) and zeros (0’s). Examples: 01011101, 01011111, 11111001, 00001010, 00101101

14. Double Quad

With double quad serial numbers, the first four digits and the last four digits are all the same numbers. Examples: 11112222, 55559999, 66661111, 00008888. The example below is a silver certificate, learn more about them from a page we wrote here.

15. High

High serial numbers are those with high numbers, specifically those over 99999900. The below example is a $2 bill from 1976. See our full two-dollar bill price guide for more information on rare $2 bills.

16. Low

Most collectors consider low serial numbers anything below 100 (A00000100A and lower) while others consider low serial numbers to be only serial numbers 1 through 9. Examples: 00000099, 00000051, 00000002, 00000072

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