Network topology

Relationships come from RIS AS_PATH observations; direction represents path position, not a commercial contract or traffic direction.

AS51424

Currently announcedSnapshot awaiting refresh

Jiri Sperl · ASAGNET

Last observed10/4/2026, 17:34:56Open ASN profile →

AS51424 relationship topology

Showing 2 / 2

AS51424Jiri Sperl

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS12570ITSELF O2 Czech Republic, a.s.

Relationship: Upstream
Observed weight: 256
ASN registration country: Czechia
Latest RIS data: 10/4/2026, 00:00:00

Open AS12570 profile →

All adjacent autonomous systems

The table preserves every relationship in the selected filter; graph limits and pagination never remove data.

2 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4	IPv6
AS12570Observed weight 256	ITSELF O2 Czech Republic, a.s.	Upstream	Czechia	8/25/2019, 00:00:00	10/4/2026, 00:00:00	1,321	0
AS204064Observed weight 256	CEZNET s.r.o.	Upstream	Czechia	8/25/2019, 00:00:00	10/4/2026, 00:00:00	665	0

CHA.LA ASN relationship snapshotRelationships are normalized by CHA.LA from collected routing observations and registration context.CHA.LA routing observations · registration context