Six of a Kind Serial Number
By Muhammad Khalid Hussain; published ; updated
A Six of a Kind serial has one digit appearing six times, plus two different digits, for exactly three distinct digits total. Banknote Expert checks all eight digits.
Enter your bill’s 8-digit serial number above to see its rarity score, any matched patterns and an estimated value range. Nothing is uploaded. The check runs entirely in your browser.
What is a six of a kind serial number?
A Six of a Kind serial has exactly six copies of one digit. The other two positions must contain two different digits, so the full serial uses three distinct digits. For example, 66666678 contains six 6s, one 7 and one 8.
Six of a Kind vs seven of a kind, solid and near solid
Seven of a Kind has seven matching digits, and a solid has eight. This site's Six of a Kind rule is narrower than a simple six-count: the two leftover digits must differ. Some competitor pages call six matching digits near solid, while others apply that phrase to seven matching digits. We use the explicit detector name and count rather than treating near solid as a precise category. Six in a Row describes six consecutive matching digits; scattered sixes can still meet the count rule.
| Pattern | Detector rule | Example |
|---|---|---|
| Six of a Kind | Six identical digits and two different others | 66666678 |
| Seven of a Kind | Seven identical digits and one other | 77717777 |
| Solid | All eight digits identical | 77777777 |
| Near solid | Informal term, used inconsistently by sellers | Check the exact digit count |
Six of a Kind examples and non-examples
The exact count and the two remaining digits both matter. A six-count with two identical leftovers has only two distinct digits and does not meet this site's Six of a Kind rule.
| Serial | Result |
|---|---|
| 66666678 | Six 6s, then two different digits |
| 67666668 | Six 6s scattered; still qualifies |
| 66666677 | Not this detector's Six of a Kind; only two distinct digits |
| 66666667 | Seven of a Kind |
| 66666666 | Solid |
How rare is Six of a Kind?
Choose the repeated digit in 10 ways, its six positions in 28 ways, then choose two ordered, different leftover digits in 9 × 8 ways. The result is 20,160 strings among 100,000,000, or 1 in 4,960. This calculation follows the detector's three-distinct-digit requirement.
How much is a Six of a Kind note worth?
No verified Six of a Kind sold-price bands are available in the site's data source. The condition cells are blank rather than borrowing values from Seven of a Kind, Radar or another category.
See the fancy serial number value guide for the site's valuation approach and use the star note lookup for a star suffix.
| Condition | Recorded range | Sample |
|---|---|---|
| Circulated | ||
| Very Fine | ||
| Uncirculated |
What raises or lowers the value?
- Six consecutive repeats can look stronger than scattered repeats, though no sale data here isolates that effect.
- Digit appeal and the remaining two digits may matter to buyers, but no digit-specific range is recorded.
- Radar, binary or star-note overlaps may add interest. They do not guarantee an extra premium.
- Denomination, condition and eye appeal remain important when comparing offers.
Should you keep, sell, or grade it?
Keep it if the pattern interests you, then check completed sales for notes with similar condition, denomination and overlaps. A circulated example with no stronger feature may not justify grading fees. Do not pay to grade based on a near-solid label alone.
How to check your serial
Count the most frequent digit, then check that it appears six times and that the other two digits differ. Preserve all eight positions and look for radar, binary or star-note overlaps.
Use the fancy serial number checker and compare the Seven of a Kind guide, Five of a Kind guide and Solid guide.
Check your serial on Banknote Expert
Enter all eight digits, including leading zeros, to see Six of a Kind and any overlapping patterns.
Open the fancy serial checkerSix of a Kind serial number FAQs
What is a six of a kind serial number?
It has six copies of one digit and two different other digits, for three distinct digits total.
Is six of a kind the same as near solid?
Near solid is used inconsistently. This site's precise label means six repeats plus two different leftover digits; other sellers may mean something else.
How rare is six of a kind?
The detector rule produces 20,160 strings among 100,000,000, or 1 in 4,960.
How much is a six of a kind note worth?
The site's verified value source has no publishable Six of a Kind band. Compare completed sales for similar notes.
Does the position of the six digits matter?
The detector counts the six matching digits wherever they appear. A consecutive run may look more striking, but no position-specific sold band is recorded.