Multiple Public IPs - Load balancer?

[x86_64]

Two additional records may also appear if the recursive resolver sends ECS information along with the query. The "ecs" record is the ECS client subnet included in the query. The "ip" record is a representative ip address selected at random by Akamai’s authoritative nameserver from the ECS client subnet. (Recursive resolvers don’t send the actual client IP they observe, in order to reduce the privacy impacts of ECS.)

whoami.ds.akahelp.net is not a good method for finding out your IP address, it just spits out a random IP from the received ECS info.
You are not contacting the domain directly but through a DNS upstream, so Akamai has no chance of knowing your IP.

A better way would be to use plethora of web based services such as curl -4 https://ip.me or if you really wanna use dig then use dig TXT o-o.myaddr.l.google.com @ns1.google.com +short