AS19043 ONEBEACONINSURANCEGROUP - OneBeacon Insurance Group LTD

🇺🇸

ARINassigned

Announced Prefixes (BGP)

4total

4 IPv40 IPv6

IPv4 Addresses

Allocated (RIR)8,192

Announced (BGP)9,216

IPv6 Addresses

Allocated (RIR)3×10²⁶

Announced (BGP)0

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

RIR

Status

assigned

Allocated

2010-03-09

Announced Prefixes

(BGP)4

Prefix	RPKI	IRR	Last Seen
205.134.128.0/19	No ROA	-	2026-10-09
205.134.128.0/24	No ROA	-	2026-10-09
205.134.132.0/23	No ROA	-	2026-10-09
205.134.158.0/24	No ROA	-	2026-10-09

(RIR)2

Prefix	Country	RIR	Status
205.134.128.0/19	🇺🇸 US	ARIN	allocated
2620:11f:3000::/40	🇺🇸 US	ARIN	allocated

(seen in AS paths)

Networks AS19043 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 AS19043 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/19043" | jq