AS18438 BROWNB - Brown Brothers Harriman & Company

🇺🇸

ARINassigned

Announced Prefixes (BGP)

20total

20 IPv40 IPv6

IPv4 Addresses

Allocated (RIR)2,048

Announced (BGP)5,120

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)0

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

RIR

Status

assigned

Allocated

2000-08-29

Announced Prefixes

(BGP)20

Prefix	RPKI	IRR	Last Seen
192.200.1.0/24	No ROA	ARINOther IRR	2026-10-08
192.200.2.0/24	No ROA	ARINOther IRR	2026-10-08
192.200.3.0/24	No ROA	Other IRR	2026-10-08
192.200.4.0/24	Valid	ARINOther IRR	2026-10-08
192.200.5.0/24	No ROA	ARINOther IRR	2026-10-08
192.200.6.0/24	No ROA	Other IRR	2026-10-08
192.200.7.0/24	No ROA	Other IRR	2026-10-08
192.200.8.0/24	No ROA	ARINOther IRR	2026-10-08
204.136.16.0/24	No ROA	-	2026-10-08
204.136.19.0/24	No ROA	-	2026-10-08

1-10 of 20

1 / 2

(RIR)8

Prefix	Country	RIR	Status
192.200.1.0/24	🇺🇸 US	ARIN	allocated
192.200.2.0/24	🇺🇸 US	ARIN	allocated
192.200.3.0/24	🇺🇸 US	ARIN	allocated
192.200.4.0/24	🇺🇸 US	ARIN	allocated
192.200.5.0/24	🇺🇸 US	ARIN	allocated
192.200.6.0/24	🇺🇸 US	ARIN	allocated
192.200.7.0/24	🇺🇸 US	ARIN	allocated
192.200.8.0/24	🇺🇸 US	ARIN	allocated

(seen in AS paths)

Networks AS18438 hands its own prefixes to: transit providers, or peers at an exchange.

ASPA

No ASPA

External Links

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS18438 should publish an ASPA object
IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/18438" | jq