Fancy Serial Number Checker

Enter your bill’s serial number and discover just how unique—and potentially valuable—it is.

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What is a Fancy Serial Number?

A fancy serial number is any U.S. dollar bill with a unique or eye-catching number pattern that makes it stand out to collectors. These numbers aren’t just fun to spot—they can sometimes be worth far more than face value.

Here are some popular types of fancy serial numbers:

  • Solid: All digits are the same (e.g., 11111111).

  • Ladder: Numbers run in sequence, either up (12345678) or down (87654321).

  • Radar: Reads the same forward and backward (e.g., 06600600).

  • Repeater: Digits repeat in a noticeable way (e.g., 12212212).

  • Bookends: First and last digits match (e.g., 22012200).

  • Trinary: Only three different digits are used (e.g., 11223344).

  • Binary: Only two digits appear, often 0 and 1 (e.g., 00001111).

  • Super Radar: Rare patterns that read the same forward, backward, and sometimes upside down (e.g., 80008000).

Collectors often pay a premium for these bills depending on the rarity, demand, and condition of the note.

What Does the Checker Result Mean?

When you use our Fancy Serial Number Checker, you’ll get a coolness score (UCI rating) that shows how special your bill is:

  • Extremely Cool (Hall of Fame): 99%+ – the rarest of the rare, highly sought after.

  • Very Cool (Gallery Material): 95–98.9% – rare and valuable to many collectors.

  • Cool: 90–94.9% – uncommon and interesting, worth keeping.

  • Almost Cool: 75–89.9% – has unique traits, but not top-tier.

  • So-So: 50–74.9% – fairly common, limited collector appeal.

  • Uncool: Below 50% – normal serial numbers with no special traits.

Are Fancy Serial Numbers Valuable?

The value of a fancy serial number depends on:

  • Rarity of the pattern

  • Overall print run

  • Bill condition (crisp uncirculated notes are worth more)

  • Collector demand

Some bills sell for hundreds—or even thousands—of dollars if the number is especially rare. Always research recent auctions and consult experts before selling.

Use this tool to check your bills and see if you’ve got a hidden gem in your wallet. Whether it’s for fun or for profit, fancy serial numbers add excitement to currency collecting.