Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Issuing network | IIN ranges | Active | Length | Validation |
| --- | --- | --- | --- | --- |
| American Express | 34, 37 [ dead link ] | Yes | 15 | Luhn algorithm |
| Bankcard | 5610, 560221-560225 | No | 16 | Luhn algorithm |
| China UnionPay | 62 or 88 | Yes | 16-19 | no validation |
| Diners Club Carte Blanche | 300-305 | Yes | 14 | Luhn algorithm |
| Diners Club enRoute | 2014, 2149 | No | 15 | no validation |
| Diners Club International | 36 | Yes | 14 | Luhn algorithm |
| Diners Club United States & Canada | 54, 55 | Yes | 16 | Luhn algorithm |
| Discover Card | 6011, 622126-622925, 644-649, 65 | Yes | 16 | Luhn algorithm |
| InstaPayment | 637-639[ citation needed ] | Yes | 16 | Luhn algorithm |
| JCB | 3528-3589 | Yes | 16 | Luhn algorithm |
| Laser | 6304, 6706, 6771, 6709 | Yes | 16-19 | Luhn algorithm |
| MasterCard | 51-55 | Yes | 16 | Luhn algorithm |
| Solo | 6334, 6767 | No | 16, 18, 19 | Luhn algorithm |
| Switch | 4903, 4905, 4911, 4936, 564182, 633110, 6333, 6759 | No | 16, 18, 19 | Luhn algorithm |
| Visa | 4 | Yes | 13, 16 | Luhn algorithm |
Question:
What is the length for iin range 51-55?
Answer:
16.0