I have a similar experience with a tendency to Digital Ocean. Actually, I semi-automatically collect IPs that are banned by (mostly SSH) fail2ban and eBPF bans from dnsdist. These IPs are then merged into CIDRs, which are used as ipsets in a firewall ban chain. The IPs are collected on around ~20 Machines with public, static IPv4 and IPv6 addresses. Most of the Machines are in Canada and Europe.
However, I have statistics for the CIDRs based on their whois record that look like:
CIDRs used: 1255
Already cached: 1252
Skipped uncached targets: 0
IPs scanned total: 985300
Estimated throttled wait: 0.10 minutes
== Country codes ==
Metric: Top 10 of 90 unique country codes
Total: 1183 country codes total and 90 unique country codes in 1255 targets
US 287
CN 132
NL 88
VN 53
DE 51
HK 45
AU 38
ID 36
RU 33
CA 27
== Regions ==
Metric: Top 10 of 29 unique regions
Total: 334 regions total and 29 unique regions in 1255 targets
CO 48
FL 40
WA 37
QLD 32
GA 26
NY 25
CA 23
TX 17
QC 15
UT 14
== Origin ASNs ==
Metric: Top 10 of 382 unique origin ASNs
Total: 805 origin ASNs total and 382 unique origin ASNs in 1255 targets
AS16276 26
AS132203 24
AS24086 18
AS38731 18
AS7552 18
AS24940 17
AS9808 15
AS135377 14
AS137718 13
AS62390 11
== Netnames ==
Metric: Top 10 of 630 unique netnames
Total: 1157 netnames total and 630 unique netnames in 1255 targets
RIPE 38
MSFT 31
SINGLEHOP 25
ACEVILLEPTELTD-SG 21
VIETTEL-VN 18
CMNET 17
APNIC 16
CHINANET-GD 14
VOLCANO-ENGINE 13
UCLOUD-HK 11
== Org names ==
Metric: Top 10 of 222 unique org names
Total: 703 org names total and 222 unique org names in 1255 targets
RIPE Network Coordination Centre 55
DigitalOcean, LLC 40
Asia Pacific Network Information Centre 32
Microsoft Corporation 31
Internap Holding LLC 25
HostPapa 23
Korea Telecom 20
Hetzner Online GmbH 17
China Mobile 16
ReliableSite.Net LLC 16
== Organizations ==
Metric: Top 10 of 236 unique organizations
Total: 691 organizations total and 236 unique organizations in 1255 targets
RIPE Network Coordination Centre (RIPE) 55
DigitalOcean, LLC (DO-13) 40
Asia Pacific Network Information Centre (APNIC) 32
Microsoft Corporation (MSFT) 31
Internap Holding LLC (IC-1425) 25
HostPapa (HOSTP-7) 23
ORG-HOA1-RIPE 17
ORG-CM1-AP 16
ReliableSite.Net LLC (RL-323) 15
FranTech Solutions (SYNDI-5) 13
== Domains ==
Metric: Top 10 of 534 unique domains
Total: 2581 domains total and 534 unique domains in 1255 targets
rdap.arin.net 404
apps.db.ripe.net 83
chinatelecom.cn 63
vnnic.vn 58
ripe.net 55
www.ripe.net 53
apnic.net 46
digitalocean.com 44
ovh.net 38
www.as14061.net 35
I deleted the (abuse) mail section. Because.
99% of the IPs are IPv4. In the IPset are mostly /32 but also a lot of ~/24 and rarely ~/16 segments. RIPE, ARIN and APNIC comes into play because some CIDR blocks are somewhat generously sized and block multiple network segments belonging to different organizations at the same time. E.g. this hides BR from the stats (because the ipset mostly bans every provider from BR).