Yes, currently these two variants don't cache; my primary use case was to use as source for PiHole/dnsmasq. I've a Python version in the works that would cache based on TTL.
Can you pls give the Python3 variant a try? It supports caching:
https://evuraan.info/evuraan/stuff/magan/magan.py.txt
You'd need scapy for Python3:
$ pip3 install scapy-python3
$ wget https://evuraan.info/evuraan/stuff/magan/magan.py.txt -O magan.py
$ chmod 755 magan.py
$ ./magan.py --help
Usage:
-h --help print this usage and exit
-p --port alternate port to listen
-v --version print version information and exit