According to the latest from CBECI, Iran's share of BTC hashrate has steadily increased over summer of 2021.
There was a blanket ban on 'crypto mining' (read: GPU farms for alts as well as BTC) announced May 26th, lasting through September 22nd, sooo...
@waxwing the graph doesn't do a great job of illustrating it but the article explicitly states an increase of 3.11% for Iran's hashrate(during a period where there should have been a marked decrease if not total collapse)
and yep - apparently they use maxmind's geoip database to correlate ip addresses to locations
Bitcoin Maston Instance