AS20743 SWX SIX Swiss Exchange AG

🇨🇭

Org handle: ORG-SSEA4-RIPE

Zurich, Switzerland

RIPE NCCallocated

Announced Prefixes (BGP)

6total

4 IPv42 IPv6

IPv4 Addresses

Allocated (RIR)0

Announced (BGP)8,960

IPv6 Addresses

Allocated (RIR)6.1×10²⁶

Announced (BGP)6.1×10²⁶

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

RIR

Status

allocated

Allocated

2001-05-16

Announced Prefixes

(BGP)6

Prefix	RPKI	IRR	Last Seen
146.109.145.0/24	Valid	RIPE	2026-10-10
146.109.153.0/24	Valid	RIPE	2026-10-10
146.109.160.0/19	Valid	RIPE	2026-10-10
146.109.161.0/24	Valid	RIPE	2026-10-10
2a01:4642:100::/40	Valid	RIPE	2026-10-10
2a01:4642:c800::/40	No ROA	-	2026-10-10

(RIR)2

Prefix	Country	RIR	Status
2a01:4642:100::/40	🇨🇭 CH	RIPE	assigned
2a01:4642:c800::/40	🇨🇭 CH	RIPE	assigned

(seen in AS paths)

Networks AS20743 hands its own prefixes to: transit providers, or peers at an exchange.

ASPA

No ASPA

Abuse Contact

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 AS20743 should publish an ASPA object
IPv4 transfers in the RIPE NCC 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/20743" | jq