For Ryerson

$($and their primary domain, where applicable$)$:

Identify their domain registrar and explain how you obtained this information.

Identify their domain registration expiry date and explain how you obtained this information.

Identify their public IP address space in CIDR notation $($anything equivalent to Class B or larger$)$ and explain how you obtained this information.

Identify their authoritative DNS servers and the time$-$to$-$live values and explain how you obtained this information. Provide the records.

Identify the mail server$($s$)$ that accept their inbound email with the priority for each server, indicate the sequence from highest to lowest priority $($where applicable$),$ and explain how you obtained this information. Provide the records.

Identify their Sender Policy Framework record and explain how you obtained this information.

Identify their autonomous system number and explain how you obtained this information.

Identify at least one of their Internet service providers and explain how you obtained this information.