Network topology

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

AS43757

Currently announcedSnapshot awaiting refresh

ICZAS-CZ ICZ a.s. · ICZAS-CZ

Last observed10/3/2026, 19:43:01Open ASN profile →

AS43757 relationship topology

Showing 3 / 3

AS43757ICZAS-CZ ICZ a.s.

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS5610O2-CZECH-REPUBLIC O2 Czech Republic, a.s.

Relationship: Upstream
Observed weight: 187
ASN registration country: Czechia
Latest RIS data: 10/3/2026, 00:00:00

Open AS5610 profile →

All adjacent autonomous systems

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3 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4	IPv6
AS5610Observed weight 187	O2-CZECH-REPUBLIC O2 Czech Republic, a.s.	Upstream	Czechia	8/23/2019, 00:00:00	10/3/2026, 00:00:00	160	185
AS5578Observed weight 186	AS-BENESTRA SWAN, a.s.	Upstream	Slovakia	8/23/2019, 00:00:00	10/3/2026, 00:00:00	239	0
AS6855Observed weight 174	SK-TELEKOM Slovak Telekom, a.s.	Upstream	Slovakia	8/23/2019, 00:00:00	10/3/2026, 00:00:00	276	149

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