IP Prefix
IPv4
104.18.16.0/20
Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.
Origin AS
AS13335
RPKI
1 ROAs
Open IPs
3,639
last 90 d
Network
Anycast
Cloudflare
Routing
Origin AS
Holder
Cloudflare
Prefix Length
/20
Multi-Origin
No
Last refresh
2026-07-21 19:59:50
RPKI Validity
max-len 20
valid
arin
RIR Allocation
Registry
ARIN
Country
Status
Allocated
Allocated
2014-03-28
Delegated block
104.16.0.0 + 1,048,576 addrs
Geographic Announcement
Anycast — Cloudflare.
This prefix is announced from many PoPs worldwide simultaneously. The MaxMind "ZZ" code below reflects "no single country" rather than "unknown" — the route taken depends on the BGP best-path of the querying ASN.
GeoIP attribution from MaxMind GeoLite2 (CC-BY-SA). The starting address of the prefix maps to:
| Country | Continent | Ranges |
|---|---|---|
| ZZ Anycast / no single country | 1 |
Sample IPs in this Prefix
| IP | Open ports | Last scan |
|---|---|---|
| 104.18.21.60 | 8 | 2026-07-17 03:36:54.000 |
| 104.18.16.211 | 7 | 2026-07-21 15:09:40.000 |
| 104.18.29.21 | 7 | 2026-07-20 09:21:51.000 |
| 104.18.16.0 | 7 | 2026-07-20 04:11:26.000 |
| 104.18.31.168 | 7 | 2026-07-18 13:53:15.000 |
| 104.18.24.123 | 7 | 2026-07-17 01:25:13.000 |
| 104.18.24.112 | 6 | 2026-07-22 00:58:00.000 |
| 104.18.18.94 | 6 | 2026-07-22 00:32:42.000 |
| 104.18.31.222 | 6 | 2026-07-21 23:36:49.000 |
| 104.18.20.138 | 6 | 2026-07-21 07:12:17.000 |
| 104.18.26.148 | 6 | 2026-07-21 05:58:07.000 |
| 104.18.20.66 | 6 | 2026-07-20 22:42:52.000 |
| 104.18.18.137 | 6 | 2026-07-20 13:07:32.000 |
| 104.18.26.105 | 6 | 2026-07-20 10:14:41.000 |
| 104.18.18.194 | 6 | 2026-07-20 09:38:33.000 |
| 104.18.18.219 | 6 | 2026-07-20 07:51:46.000 |
| 104.18.17.190 | 6 | 2026-07-20 07:35:39.000 |
| 104.18.26.50 | 6 | 2026-07-20 03:37:00.000 |
| 104.18.21.12 | 6 | 2026-07-20 01:22:56.000 |
| 104.18.18.247 | 6 | 2026-07-19 18:09:52.000 |
| 104.18.22.211 | 6 | 2026-07-19 01:10:47.000 |
| 104.18.21.231 | 6 | 2026-07-18 13:46:11.000 |
| 104.18.26.242 | 6 | 2026-07-18 08:28:35.000 |
| 104.18.27.63 | 6 | 2026-07-18 07:32:28.000 |
| 104.18.24.125 | 6 | 2026-07-18 05:05:30.000 |
Cert Subjects in this Prefix
| Subject | Hosts | Last seen |
|---|---|---|
| *.agu.org | 1 | 2026-07-19 04:17:12.873 |
| kitepharma.com | 1 | 2026-07-19 02:21:14.529 |
Hosted Domains
Domains that resolve to any address in this prefix — aggregated across the whole subnet. 171,572 distinct domains seen; top by span shown.
History
Prefix-event history pending
Origin AS changes, ROA add/drop events, multi-origin episodes and withdrawals require snapshot-diffing across BGP crawls. The data accumulates as the archive grows — full ReplacingMergeTree compaction makes point-in-time event extraction unavailable for now.