Static IPv6 getting a /59 PD on DPC3941B
I'm using a Mikrotik router connected to the Comcast gateway, a DPC3941B, and i'm asking for a /56 Prefix Delegation but getting a /59. I've also tried using an EdgeRouter and a Sophos UTM with the same /59 PD getting delegated.
I'm a Static IP customer with a /28 IPv4 block, and would love to subdelegate prefixes using the /56.
How can I get the /56 that i see advertised on both the Gateway's interface and on the Comcast View Static IP Setting page? Nothing that i do on my end gets me a /56 prefix.
Can anyone help? Thanks in advance.