AS18438 Brown Brothers Harriman & Company 🇺🇸 US

Announcing 20 prefixes, seen at the RIS collectors.

IPv4 prefixes
20
5,120 (20 × /24)
IPv6 prefixes
0
-
Upstreams
9
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
0
transit customers observed
Customer cone
0
ASes reachable through it

Registry and operator data

AS number
AS18438
Name
Brown Brothers Harriman & Company
Organisation
Brown Brothers Harriman & Company
Country
🇺🇸 US
RIR
ARIN
Allocated
2000-08-29

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

3 valid (15.0%) 0 invalid (0.0%) 17 no ROA (85.0%)

Announced prefixes

20 in total

Prefix RPKI Peers Sample path First seen
192.200.1.0/24 v4 no ROA 41 34549352805500218438 2026-09-18
192.200.2.0/24 v4 no ROA 41 34549352805500218438 2026-09-18
192.200.3.0/24 v4 no ROA 41 34549352805500218438 2026-09-18
192.200.4.0/24 v4 RPKI valid 41 34549352805500218438 2026-09-18
192.200.5.0/24 v4 no ROA 41 34549352805500218438 2026-09-18
192.200.6.0/24 v4 no ROA 41 34549352805500218438 2026-09-18
192.200.7.0/24 v4 no ROA 41 34549352805500218438 2026-09-18
192.200.8.0/24 v4 no ROA 41 34549352805500218438 2026-09-18
204.136.16.0/24 v4 no ROA 41 3454917418438 2026-09-18
204.136.19.0/24 v4 no ROA 42 37721335618438 2026-09-18
204.136.20.0/24 v4 no ROA 42 38001251618438 2026-09-18
204.136.23.0/24 v4 no ROA 42 34549646118438 2026-09-18
204.136.24.0/24 v4 no ROA 42 3454964614688718438 2026-09-18
204.136.25.0/24 v4 no ROA 42 3454964614688718438 2026-09-18
204.136.26.0/24 v4 no ROA 41 34549352805500218438 2026-09-18
204.136.27.0/24 v4 no ROA 41 34549352805500218438 2026-09-18
204.136.28.0/24 v4 RPKI valid 47 69395400418438 2026-09-18
204.136.29.0/24 v4 no ROA 41 3454917418438 2026-09-18
204.136.30.0/24 v4 RPKI valid 41 34549352805500218438 2026-09-18
204.136.31.0/24 v4 no ROA 42 37721335618438 2026-09-18