AS18438
Brown Brothers Harriman & Company
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS18438 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 204.136.30.0/24 | 18,219 | 2026-07-29 13:15:11 |
| 192.200.7.0/24 | 17,216 | 2026-07-29 12:36:02 |
| 192.200.6.0/24 | 17,206 | 2026-07-29 12:35:27 |
| 192.200.5.0/24 | 17,180 | 2026-07-29 12:34:53 |
| 192.200.2.0/24 | 17,171 | 2026-07-29 11:44:30 |
| 204.136.28.0/24 | 13,709 | 2026-07-29 13:15:11 |
| 204.136.29.0/24 | 6,111 | 2026-07-29 13:15:11 |
| 204.136.16.0/24 | 6,092 | 2026-07-29 13:15:11 |
| 204.136.26.0/24 | 5,366 | 2026-07-29 13:15:11 |
| 204.136.27.0/24 | 5,214 | 2026-07-29 13:15:11 |
| 192.200.3.0/24 | 5,183 | 2026-07-29 12:38:31 |
| 192.200.1.0/24 | 5,179 | 2026-07-29 12:37:26 |
| 192.200.8.0/24 | 5,179 | 2026-07-29 12:31:32 |
| 204.136.25.0/24 | 5,014 | 2026-07-29 13:11:11 |
| 204.136.24.0/24 | 4,992 | 2026-07-29 13:11:11 |
| 204.136.20.0/24 | 4,867 | 2026-07-29 13:17:19 |
| 204.136.19.0/24 | 4,617 | 2026-07-29 13:15:11 |
| 204.136.31.0/24 | 4,595 | 2026-07-29 13:15:38 |
| 204.136.23.0/24 | 3,719 | 2026-07-29 13:15:11 |
| 192.200.4.0/24 | 2,439 | 2026-07-29 12:57:48 |
Frequently Asked Questions
What is AS18438?
AS18438 is an Autonomous System Number assigned to Brown Brothers Harriman & Company. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS18438 announce?
AS18438 announces 5.1K IPv4 addresses distributed across 11 routed CIDR prefixes. The network is registered in United States.
Who operates AS18438?
AS18438 is operated by Brown Brothers Harriman & Company. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS18438 registered in?
AS18438 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
