I run an open access usenet server, but only for those within my CC, so access is by IP based on our CC allocations from APNIC.
Because IPv4 exhaustion this changes sometimes with buying allocations from other regions, and if they get denied access I encourage them to let us know so we can keep ACL's updated, I've had a request from a starlink user who claims they are here, but traceroute shows them in .DE
tracing some 217.foo.ad.dr
...
9 ae-6.r21.frnkge13.de.bb.gin.ntt.net (129.250.3.183) 290.223 ms 290.180 ms ae-1.r20.frnkge13.de.bb.gin.ntt.net (129.250.7.35) 280.523 ms
10 ae-1.a03.frnkge13.de.bb.gin.ntt.net (129.250.3.152) 290.109 ms 289.667 ms 292.864 ms
11 ae-0.spacex.frnkge13.de.bb.gin.ntt.net (213.198.72.19) 279.611 ms 278.840 ms 279.592 ms
12 undefined.hostname.localhost (206.224.65.189) 280.127 ms 278.506 ms 284.265 ms
13 undefined.hostname.localhost (206.224.65.209) 284.198 ms undefined.hostname.localhost (206.224.65.201) 274.663 ms 273.073 ms
14 * * *
Regards,
Noel Butler