Observed topology

AS21217 SAFEHOSTNET Infrastructure Switzerland Colo Sarl

Hosting RIPE

Upstreams 6 carry this network

Downstreams 2 this network carries

Adjacent (IPv4) 8

Adjacent (IPv6) 5

Upstream graph Who carries AS21217, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS21217 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS21217: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

AS	Network	Type	Families	Paths seen
AS25091	IP-Max SA	Unclassified	IPv4 IPv6	533
AS3356	Level 3 Parent, LLC	Transit	IPv4 IPv6	89
AS3342	Cibicom A/S	Unclassified	IPv4	60
AS47176	GAS&COM AG	Unclassified	IPv4 IPv6	59
AS13237	euNetworks GmbH	Unclassified	IPv4 IPv6	50
AS20932	Services Industriels de Geneve	Unclassified	IPv4 IPv6	48

Transit

Downstream networks

inferred

Networks for which AS21217 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS42600	Global Message Services Ukraine LLC	Unclassified	IPv4	45
AS50350	MKS Pamp SA	Unclassified	IPv4	24

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS21217 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS25091	IP-Max SA	Unclassified	IPv4 IPv6	580
AS3356	Level 3 Parent, LLC	Transit	IPv4 IPv6	93
AS47176	GAS&COM AG	Unclassified	IPv4 IPv6	66
AS3342	Cibicom A/S	Unclassified	IPv4	60
AS13237	euNetworks GmbH	Unclassified	IPv4 IPv6	57
AS20932	Services Industriels de Geneve	Unclassified	IPv4 IPv6	52
AS42600	Global Message Services Ukraine LLC	Unclassified	IPv4	45
AS50350	MKS Pamp SA	Unclassified	IPv4	24

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-01 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.48M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you. Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.