Using Client Subnet in DNS Requests

BIG-IP DNS 14.0 now supports edns-client-subnet (ECS) for both responding to client requests (GSLB) or forwarding client requests (screening). The following is a quick start on using this feature. ...
Published Sep 14, 2018
Version 1.0
application delivery
BIG-IP DNS
Robin_Mordasiew's avatar
Robin_Mordasiew
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May 08, 2019

Short answer is, yes this can be done, but you would need to use an irule.