Or even more niche in your outlier status if you could remember IPs of the commonly used servers without a DNS in place.
Most of the time, local networked IPs all start with the same values for the first 3 octets (maybe 2 if VLAN but then usually only one digit diff). The same was true for most people's local phone number memorized registry. Those of us old enough, we only had to dial 5 digits using (70s) the last number of the prefix before eventually moving to 7 digits to include the full prefix (80s). The world suddenly changed when we had to dial the entire area code as well (90s).
