The question "which ASN are the clients coming from?" was exactly the reason I revived AWFFull — the new version adds an ASN table based on the DB-IP ASN Lite database :-)
To your point about it maybe being a paid feature: the DB-IP Lite files are free (CC-BY), so the ASN part doesn't have to cost anything — it's just not what the MaxMind-oriented tooling usually reaches for.
To your point about it maybe being a paid feature: the DB-IP Lite files are free (CC-BY), so the ASN part doesn't have to cost anything — it's just not what the MaxMind-oriented tooling usually reaches for.