Radar Serial Number
Checker & Value Guide
A Radar reads the same forwards and backwards — like 12344321. Found one? It could be worth $20–$200+. Check yours now.
Enter Your USD Serial Number
What Is a Radar Serial Number?
A Radar serial number is a palindrome — the digits read identically in either direction. The term comes from the word "radar" itself, which is a palindrome. Radars are one of the most popular fancy serial number patterns for new collectors.
Reads the same both ways.
Palindrome built from only two unique digits.
Radar Note Value Guide (2025)
| Type | Example | Circulated | Uncirculated |
|---|---|---|---|
| Standard Radar ($1) | 12344321 | $15 – $40 | $40 – $80 |
| Radar ($20+) | 08100180 | $40 – $80 | $80 – $200+ |
| Super Radar | 11188111 | $80 – $150 | $150 – $400+ |
| Radar + Star Note | 12344321* | $100 – $250 | $250 – $800+ |
How to Spot a Radar in 10 Seconds
- Locate the 8-digit serial number (top left or bottom right of the bill).
- Split the number down the middle — if the left half mirrors the right half, it's a Radar.
- If it also uses only two unique digits (like 11100111), it's a Super Radar.
- Enter the number in the checker above for instant confirmation and eBay comparables.
💡 Related Patterns Worth Checking
- Solid serial numbers — every digit identical (e.g., 88888888)
- Low serial numbers — under 100 or 1,000
- Star Notes — replacement bills marked with a star
Frequently Asked Questions
Everything you need to know about collecting fancy serial numbers.
What is a Radar serial number?
A Radar serial number is a palindrome — it reads the same forwards and backwards. For example, 12344321 or 80000008 are Radars. They're a favorite among beginner collectors because the pattern is instantly recognizable and mathematically uncommon.
How much is a Radar bill worth?
A standard Radar note on a $1 bill typically sells for $15–$40 in circulated condition and $40–$80 uncirculated. On higher denominations ($20, $50, $100), Radar notes can fetch $50–$200+. Condition and denomination are the biggest value drivers.
What is a Super Radar?
A Super Radar is a rarer Radar where the serial number uses only two digits total, like 11199111 or 22200222. These are far scarcer than standard Radars and can sell for $80–$300+ depending on denomination.
How is a Radar different from a Repeater?
A Radar reads the same forwards and backwards (12344321). A Repeater has the first half identical to the second half (45674567). Both are collectible but distinct patterns — our checker identifies each correctly.
How rare are Radar serial numbers?
Out of every 10,000 8-digit serial numbers, only about 10 are true Radars — roughly 1 in 1,000. That rarity is why collectors are willing to pay a premium over face value even on lower denominations.
Can I use this Radar checker for any US bill?
Yes. Our Radar serial number checker works for all modern US Federal Reserve Notes: $1, $2, $5, $10, $20, $50, and $100. Just enter the 8-digit serial number above and we'll tell you instantly if it's a Radar, Super Radar, or another fancy pattern.
Have a specific question not answered here? Check our detailed Value Guide above.